Dr Scott Watson
- Lecturer in Electronic and Photonic Devices (Electronic & Nanoscale Engineering)
telephone:
01413304799
email:
Scott.Watson@glasgow.ac.uk
School of Engineering, Rankine Building, Oakfield Avenue, G12 8LT
Research interests
Scott is currently working as a Lecturer in Electronic & Photonics Devices. He completed his PhD on visible light communications at the University of Glasgow, before conducting research across a range of topics as a postdoctoral researcher.
Research interests include:
- The use of lasers and LEDs in the visible spectrum for communications in free space, through fibre and underwater.
- Narrow linewidth DFB lasers for optical quantum clocks and underwater communications.
- Lasers at 1310 nm and 1550 nm for telecommunications.
- Resonant tunneling diodes, both electrically and optically driven, for terahertz communication applications.
- Single photon avalanche detectors (SPADs) for LiDAR.
Publications
2024
Kafar, A. et al. (2024) GaN Laser Diodes for Quantum Sensing, Precision Metrology, and Quantum Computing. In: SPIE Quantum West, 2024, San Francisco, CA, U.S.A., 27 Jan -1 Feb 2024, p. 134. (doi: 10.1117/12.2691756)
Watson, S. et al. (2024) 422 nm Distributed Feedback Laser for a Compact Strontium Ion Optical Clock. In: SPIE Quantum West, 2024, San Francisco, CA, U.S.A., 27 Jan -1 Feb 2024, p. 2. (doi: 10.1117/12.3000207)
2023
Najda, S. P. et al. (2023) GaN laser diodes for the development of quantum sensing and timing systems. In: SPIE Photonex 2023, Glasgow, UK, 23-26 Oct 2023, p. 13. (doi: 10.1117/12.2691754)
Watson, S. , Najda, S. P., Perlin, P., Suski, T., Marona, L., Leszczynski, M., Stanczyk, S., Schiavon, D., Slight, T. J. and Kelly, A. E. (2023) Blue Lasers for Optical Wireless Communications. In: 2023 23rd International Conference on Transparent Optical Networks (ICTON), Bucharest, Romania, 02-06 July 2023, pp. 1-4. ISBN 9798350303032 (doi: 10.1109/ICTON59386.2023.10207417)
Ye, S. et al. (2023) 1.55-µm sidewall grating DFB lasers integrated with a waveguide crossing for an optical beam forming network. IEEE Photonics Technology Letters, 35(14), pp. 785-788. (doi: 10.1109/LPT.2023.3278880)
Coughlan, C., Mirza, M. M.A. , Kirdoda, J. , Dumas, D., Smith, C., McCarthy, C. , Mowbray, H., Watson, S. , Millar, R. and Paul, D. J. (2023) Variation of Sidewall Passivation on Sub-um Selectively Grown Ge-on-Si Devices Towards Single Photon Avalanche Detectors. In: SPIE OPTO 2023, San Francisco, CA, USA, 28 Jan-3 Feb 2023, 124170M. ISBN 9781510659391 (doi: 10.1117/12.2665493)
2022
Al-Moathin, A. et al. (2022) EML based on identical epitaxial layer, side-wall grating and HSQ planarization. IEEE Photonics Technology Letters, 34(6), pp. 317-320. (doi: 10.1109/LPT.2022.3155730)
2021
Millar, R. W. et al. (2021) Pseudo-planar Ge-on-Si Single-photon Avalanche Diode Detector with Record Low Noise-equivalent Power. In: SPIE PHOTONEX, Glasgow, UK, 28 Sep - 01 Oct 2021, (doi: 10.1117/12.2599033)
Al-Moathin, A., Ye, S. , Watson, S. , Di Gaetano, E. , Al-Taai, Q. R. A. , Eddie, I., Li, C., Hou, L. , Kelly, A. and Marsh, J. H. (2021) Electroabsorption Modulated Laser Based on Identical Epitaxial Layer and Transmission Line Technology. In: CLEO/Europe-EQEC 2021, Munich, Germany, 21-25 Jun 2021, ISBN 9781665418768 (doi: 10.1109/CLEO/Europe-EQEC52157.2021.9542103)
Millar, R. W. et al. (2021) Ge-on-Si Single-Photon Avalanche Diode Detectors with Low Noise Equivalent Power in the Short-Wave Infrared. In: 2021 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC), Munich, Germany, 21-25 June 2021, ISBN 9781665418768 (doi: 10.1109/CLEO/Europe-EQEC52157.2021.9542785)
Di Gaetano, E. , Watson, S. , McBrearty, E. , Sorel, M. and Paul, D. J. (2021) Sub-MHz linewidth distributed feedback laser at 780.24-nm emission wavelength for 87Rb applications. Novel In-Plane Semiconductor Lasers XX, 06-12 Mar 2021. ISBN 9781510642454 (doi: 10.1117/12.2582524)
Gwyn, S. et al. (2021) Dynamic device characteristics and linewidth measurement of InGaN/GaN laser diodes. IEEE Photonics Journal, 13(1), 1500510. (doi: 10.1109/JPHOT.2020.3045218)
2020
Watson, S. , Di Gaetano, E. , McBrearty, E. , Sorel, M. and Paul, D. J. (2020) Narrow Linewidth Distributed Feedback Diode Lasers for Cooling in Cold Atom Systems. In: CLEO: Applications and Technology 2020, Washington, DC, USA, 10-15 May 2020, AF3I.5. ISBN 9781943580767 (doi: 10.1364/CLEO_AT.2020.AF3I.5)
Watson, S. et al. (2020) Distributed Feedback Lasers for Quantum Cooling Applications. In: 22nd International Conference on Transparent Optical Networks (ICTON), Bari, Italy, 19-23 July 2020, ISBN 9781728184241 (doi: 10.1109/ICTON51198.2020.9203200)
Di Gaetano, E. , Watson, S. , McBrearty, E. , Sorel, M. and Paul, D.J. (2020) Sub-MHz linewidth 780.24 nm distributed feedback laser for ⁸⁷Rb applications. Optics Letters, 45(13), pp. 3529-3532. (doi: 10.1364/OL.394185)
Cantú, H. I., McKee, A., Ivanov, P., Watson, S. and Kelly, A. E. (2020) The effect of detuned wavelength in the dynamic performance of distributed feedback lasers operating at O band and C band. Microwave and Optical Technology Letters, 62(4), pp. 1466-1470. (doi: 10.1002/mop.32206)
2019
Gwyn, S. et al. (2019) GaN-based Distributed Feedback Laser Diodes for Optical Communications. In: Fourth International Conference on Applications of Optics and Photonics, Lisbon, Portugal, 31 May - 04 Jun 2019, 112070O. ISBN 9781510631632 (doi: 10.1117/12.2527074)
Leitao, M. F. et al. (2019) Pump-power-dependence of CsPbBr₃-in-Cs₄PbBr₆ quantum dot color converter. Optical Materials Express, 9(8), pp. 3504-3518. (doi: 10.1364/OME.9.003504)
Zhang, W. et al. (2019) Optical direct intensity modulation of a 79GHz resonant tunneling diode-photodetector oscillator. Optics Express, 27(12), pp. 16791-16797. (doi: 10.1364/OE.27.016791) (PMID:31252899)
Watson, S. , Zhang, W., Tavares, J., Figueiredo, J., Cantu, H., Wang, J., Wasige, E. , Salgado, H., Pessoa, L. and Kelly, A. (2019) Resonant tunneling diode photodetectors for optical communications. Microwave and Optical Technology Letters, 61(4), pp. 1121-1125. (doi: 10.1002/mop.31689)
Watson, S. , Zhang, W., Tavares, J., Figueiredo, J., Cantu, H., Wang, J., Wasige, E. , Salgado, H., Pessoa, L. and Kelly, A. (2019) Resonant tunneling diode photodetectors for optical communications. Microwave and Optical Technology Letters, 61(4), pp. 1121-1125. (doi: 10.1002/mop.31689)
Slight, T. J. et al. (2019) Recent progress in distributed feedback InGaN/GaN laser diodes. In: Novel In-Plane Semiconductor Lasers XVIII, San Francisco, CA, USA, 02-07 Feb 2019, 109390I. ISBN 9781510625204 (doi: 10.1117/12.2507630)
2018
Slight, T. J. et al. (2018) Continuous-wave operation of (Al,In)GaN distributed-feedback laser diodes with high-order notched gratings. Applied Physics Express, 11(11), 112701. (doi: 10.7567/APEX.11.112701)
Slight, T. J. et al. (2018) Distributed Feedback InGaN/GaN Laser Diodes. In: Gallium Nitride Materials and Devices XIII - San Francisco, United States, San Francisco, California, United States, 27 Jan-1 Feb 2018, p. 45. ISBN 9781510615496 (doi: 10.1117/12.2285632)
Watson, S. et al. (2018) InGaN/GaN Laser Diodes and their Applications. 20th Anniversary International Conference on Transparent Optical Networks (ICTON 2018), Bucharest, Romania, 1-5 July 2017. ISBN 9781538666043 (doi: 10.1109/ICTON.2018.8473864)
Yadav, A. et al. (2018) InGaN Distributed Feed back Laser with Sidewall Gratings Emitting at 42X nm. 2018 International Conference Laser Optics (ICLO), St. Petersburg, Russia, 4-8 June 2018. p. 606. ISBN 9781538636114 (doi: 10.1109/LO.2018.8435673)
Zhang, W., Watson, S. , Wang, J., Figueiredo, J., Wasige, E. and Kelly, A. E. (2018) Optical Characteristics Analysis of Resonant Tunneling Diode Photodiode Based Oscillators. In: 2018 IEEE 87th Vehicular Technology Conference (VTC Spring), Porto, Portugal, 3-6 June 2018, ISBN 9781538663554 (doi: 10.1109/VTCSpring.2018.8417889)
2017
Leitao, M. F. et al. (2017) MicroLED-pumped Perovskite Quantum Dot Color Converter for Visible Light Communications. In: 2017 IEEE Photonics Conference (IPC), Orlando, FL, USA, 01-05 Oct 2017, pp. 69-70. ISBN 9781509065783 (doi: 10.1109/IPCon.2017.8116011)
Leitao, M. F., Santos, J. M.M., Guilhabert, B., Watson, S. , Kelly, A. E. , Islim, M. S., Haas, H., Dawson, M. D. and Laurand, N. (2017) Gb/s visible light communications with colloidal quantum dot color converters. IEEE Journal of Selected Topics in Quantum Electronics, 23(5), 1900810. (doi: 10.1109/JSTQE.2017.2690833)
Watson, S. , Zhang, W., Wang, J., Al-Khalidi, A. , Cantu, H., Figueiredo, J., Wasige, E. and Kelly, A. E. (2017) Resonant Tunneling Diode Oscillators for Optical Communications. In: Third International Conference on Applications of Optics and Photonics, Faro, Portugal, 08-12 May 2017, 104532Q. ISBN 9781510613836 (doi: 10.1117/12.2276319)
Cantú, H.I., McKee, A., Childs, D. , Watson, S. and Kelly, A.E. (2017) Dynamic performance of detuned ridge waveguide AlInGaAs distributed feedback laser diodes. Microwave and Optical Technology Letters, 59(6), pp. 1468-1470. (doi: 10.1002/mop.30561)
Islim, M. S. et al. (2017) Towards 10 Gb/s orthogonal frequency division multiplexing-based visible light communication using a GaN violet micro-LED. Photonics Research, 5(2), A35-A43. (doi: 10.1364/PRJ.5.000A35)
Viola, S., Islim, M. S., Watson, S. , Videv, S., Haas, H. and Kelly, A. E. (2017) 15 Gb/s OFDM-based VLC Using Direct Modulation of 450 GaN Laser Diode. In: Advanced Free-Space Optical Communication Techniques and Applications III, Warsaw, Poland, 11-14 Sep 2017, 104370E. ISBN 9781510613386 (doi: 10.1117/12.2292004)
2016
Ferreira, R. X.G. et al. (2016) High bandwidth GaN-based micro-LEDs for multi-Gb/s visible light communications. IEEE Photonics Technology Letters, 28(19), pp. 2023-2026. (doi: 10.1109/LPT.2016.2581318)
Najda, S.P. et al. (2016) AlGaInN laser diode technology for free-space and plastic optical fibre telecom applications. Proceedings of the SPIE: The International Society for Optical Engineering, 9739, 97390U. (doi: 10.1117/12.2207237)
Najda, S. P. et al. (2016) AlGaInN laser diode technology for GHz high-speed visible light communication through plastic optical fiber and water. Optical Engineering, 55(2), 026112. (doi: 10.1117/1.OE.55.2.026112)
Giuliano, G. , Viola, S., Watson, S. , Laycock, L., Rowe, D. and Kelly, A. E. (2016) Laser Based Underwater Communication Systems. In: 18th International Conference on Transparent Optical Networks (ICTON), Trento, Italy, 10-14 July 2016, pp. 1-4. ISBN 9781509014675 (doi: 10.1109/ICTON.2016.7550382)
Leitao, M. et al. (2016) Colloidal Quantum Dot and Epitaxial Quantum-Well Platelet Colour-Converters for Visible Light Communication. In: Semiconductor and Integrated Optoelectronics (SIOE'16), Cardiff, Wales, 5-7 Apr 2016,
Najda, S. P. et al. (2016) AlGaInN Laser Diode Technology for Systems Applications. In: Gallium Nitride Materials and Devices XI, San Francisco, CA, USA, 15-18 Feb 2016, p. 974819. ISBN 9781628419832 (doi: 10.1117/12.2207231)
Najda, S.P. et al. (2016) Free-space and underwater GHz data transmission using AlGaInN laser diode technology. Proceedings of the SPIE: The International Society for Optical Engineering, 9833, 983309. (doi: 10.1117/12.2208330)
Santos, J.M. et al. (2016) Colloidal Quantum Dot Color Converters for Visible Light Communications. In: 2016 IEEE Photonics Conference (IPC), Waikoloa, HI, USA, 2-6 Oct 2016, pp. 396-397. ISBN 9781509019069 (doi: 10.1109/IPCon.2016.7831155)
Watson, S. et al. (2016) High Speed Visible Light Communication Using Blue GaN Laser Diodes. In: Advanced Free-Space Optical Communication Techniques and Applications II, Edinburgh, UK, 26-29 Sept 2016, 99910A. (doi: 10.1117/12.2245495)
2015
Najda, S., Perlin, P., Marona, L., Leszczyński, M., Czernecki, R., Watson, S. , Kelly, A. E. , Watson, M. A., Blanchard, P. and White, H. (2015) Novel laser diode technology for free-space communications. SPIE Newsroom, (doi: 10.1117/2.1201508.006070)
Herrnsdorf, J. et al. (2015) Active-matrix GaN micro light-emitting diode display with unprecedented brightness. IEEE Transactions on Electron Devices, 62(6), pp. 1918-1925. (doi: 10.1109/TED.2015.2416915)
Santos, J. M. M. et al. (2015) Hybrid GaN LED with capillary-bonded II–VI MQW color-converting membrane for visible light communications. Semiconductor Science and Technology, 30(3), 035012. (doi: 10.1088/0268-1242/30/3/035012)
Herrnsdorf, J., McKendry, J. J.D., Ferreira, R., Henderson, R., Videv, S., Watson, S. , Haas, H., Kelly, A. E. , Gu, E. and Dawson, M. D. (2015) Single-Chip Discrete Multitone Generation. In: 2015 Summer Topicals Meeting Series (SUM), Nassau, Bahamas, 13-15 Jul 2015, pp. 47-48. ISBN 9781479974689 (doi: 10.1109/PHOSST.2015.7248185)
McKendry, J. D., Tsonev, D., Ferreira, R., Videv, S., Griffiths, A. D., Watson, S. , Gu, E., Kelly, A. E. , Haas, H. and Dawson, M. D. (2015) Gb/s Single-LED OFDM-Based VLC Using Violet and UV Gallium Nitride μLEDs. In: 2015 IEEE Summer Topicals Meeting Series (SUM), Nassau, Bahamas, 13-15 July 2015, pp. 175-176. ISBN 9781479974689 (doi: 10.1109/PHOSST.2015.7248252)
Najda, S. P. et al. (2015) AlGaInN laser diode technology for free-space telecom applications. Free-Space Laser Communication and Atmospheric Propagation XXVII, San Francisco, CA, USA, 7 Feb 2015. 93540Q. (doi: 10.1117/12.2077459)
Najda, S. P. et al. (2015) AlGaInN laser diode technology and systems for defence and security applications. Laser Technology for Defense and Security XI, Baltimore, MD, USA, 20 Apr 2015. p. 946604. (doi: 10.1117/12.2178463)
Najda, S. P. et al. (2015) Advances in Single Mode and High Power AlGaInN Laser Diode Technology for Systems Applications. In: Gallium Nitride Materials and Devices X, San Francisco, CA, USA, 07 Feb 2015, 93631A. (doi: 10.1117/12.2076268)
Najda, S. P. et al. (2015) AlGaInN laser diode technology and systems for defence and security applications. In: Electro-Optical Remote Sensing, Photonic Technologies, and Applications IX, 96490P. ISBN 9781628418590 (doi: 10.1117/12.2193381)
Santos, J.M.M., Watson, S. , Guilhabert, B., Krysa, A., Kelly, A.E. , Laurand, N. and Dawson, M. D. (2015) MQW Nanomembrane Assemblies for Visible Light Communications. In: 2015 Photonics Conference (IPC), Reston, VA, USA, 04-08 Oct 2015, pp. 523-524. ISBN 9781479974658 (doi: 10.1109/IPCon.2015.7323489)
Watson, S. , Najda, S. P., Perlin, P., Leszczynski, M., Targowski, G., Grzanka, S., Watson, M. A., White, H. and Kelly, A. E. (2015) Multi-Gigabit Data Transmission Using a Directly Modulated Gan Laser Diode for Visible Light Communication Through Plastic Optical Fiber and Water. In: 2015 IEEE Summer Topicals Meeting Series (SUM), Nassau, Bahamas, 13-15 July 2015, pp. 224-225. ISBN 9781479974689 (doi: 10.1109/PHOSST.2015.7248278)
2014
Tsonev, D. et al. (2014) A 3-Gb/s single-LED OFDM-based wireless VLC link using a gallium nitride µLED. IEEE Photonics Technology Letters, 26(7), pp. 637-640. (doi: 10.1109/LPT.2013.2297621)
Los Alamos National Security, Llc (2014) High-Sensitivity, High-Speed Continuous Imaging System. .
Najda, S. P. et al. (2014) Advances in AlGaInN Laser Diode Technology. In: Gallium Nitride Materials and Devices IX, San Francisco, CA, USA, 1 Feb 2014, 89861O. (doi: 10.1117/12.2039253)
Najda, S. P. et al. (2014) AlGaInN Laser Diode Technology for Defence, Security and Sensing Applications. In: Emerging Technologies in Security and Defence II; and Quantum-Physics-based Information Security III, Amsterdam, The Netherlands, 22 Sept 2014, 92540Z. (doi: 10.1117/12.2072172)
Tian, P. et al. (2014) Characteristics and applications of micro-pixelated GaN-based light emitting diodes on Si substrates. Journal of Applied Physics, 115(3), 033112. (doi: 10.1063/1.4862298)
Tian, P., McKendry, J. J.D., Herrnsdorf, J., Watson, S., Ferreira, R., Watson, I. M., Gu, E., Kelly, A. E. and Dawson, M. D. (2014) Temperature-dependent efficiency droop of blue InGaN micro-light emitting diodes. Applied Physics Letters, 105(171107), (doi: 10.1063/1.4900865)
Watson, M. A. et al. (2014) Assessment of Laser Tracking and Data Transfer for Underwater Optical Communications. In: Unmanned/Unattended Sensors and Sensor Networks X, Amsterdam, The Netherlands, 22 Sept 2014, 92480T. (doi: 10.1117/12.2073675)
2013
Watson, S., Tan, M., Najda, S. P., Perlin, P., Leszczynski, M., Targowski, G., Grzanka, S. and Kelly, A.E. (2013) Visible light communications using a directly modulated 422 nm GaN laser diode. Optics Letters, 38(19), p. 3792. (doi: 10.1364/OL.38.003792)
Tian, P. et al. (2013) Characteristics and Applications of InGaN Micro-Light Emitting Diodes on Si Substrates. In: 2013 IEEE Photonics Conference (IPC), Bellevue, WA, USA, 8-12 Sep 2013, pp. 97-98. ISBN 9781457715068 (doi: 10.1109/IPCon.2013.6656387)
Zhang, S., Watson, S., Mckendry, J., Massoubre, D., Cogman, A., Gu, E., Henderson, R., Kelly, A. and Dawson, M. (2013) 1.5 Gbit/s multi-channel visible light communications using CMOS-controlled gaN-based lEDs. Journal of Lightwave Technology, 31(8), pp. 1211-1216. (doi: 10.1109/JLT.2013.2246138)
Najda, S. P. et al. (2013) Advances in AlGaInN Laser Diode Technology for Defence Applications. In: Emerging Technologies in Security and Defence; and Quantum Security II; and Unmanned Sensor Systems X, Dresden, Germany, 23-26 Sep 2013, 88990B. (doi: 10.1117/12.2028717)
Najda, S.P. et al. (2013) Advances in Single Mode, High Frequency and High Power AlGaInN Laser Diodes. In: 2013 Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR), Kyoto, Japan, 30 Jun - 04 Jul 2013, ISBN 9781467364768 (doi: 10.1109/CLEOPR.2013.6600214)
Watson, S., Tan, M., Najda, S. P., Perlin, P., Leszczynski, M., Targowski, G., Grzanka, S. and Kelly, A.E. (2013) High frequency modulation of a 422 nm GaN laser diode. In: 15th International Conference on Transparent Optical Networks (ICTON 2013), Cartagena, Spain, 23-27 Jun 2013, pp. 1-4. (doi: 10.1109/ICTON.2013.6602765)
2012
Zhang, S. et al. (2012) CMOS-controlled color-tunable smart display. IEEE Photonics Journal, 4(5), pp. 1639-1646. (doi: 10.1109/JPHOT.2012.2212181)
Herrnsdorf, J. et al. (2012) Hybrid organic/GaN photonic crystal light-emitting diode. Applied Physics Letters, 101(14), 141122. (doi: 10.1063/1.4757870)
Zhang, S. et al. (2012) Directly color-tunable smart display based on a CMOS-controlled micro-LED array. In: 2012 IEEE Photonics Conference (IPC), Burlingame, CA, USA, 23-27 Sep 2012, pp. 435-436. ISBN 9781457707315 (doi: 10.1109/IPCon.2012.6358679)
Zhang, S., Watson, S., Mckendry, J. J.D., Massoubre, D., Cogman, A., Gu, E., Henderson, R., Kelly, A. and Dawson, M. (2012) High-bandwidth parallel data transmission using GaN/CMOS micro-LED arrays. In: 2012 IEEE Photonics Conference (IPC), Burlingame, CA, USA, 23-27 Sep 2012, pp. 38-39. ISBN 9781457707315 (doi: 10.1109/IPCon.2012.6358477)
Abid, K., Wang, X., Khokhar, A.Z., Watson, S., Al-Hasani, S. and Rahman, F. (2012) Publisher’s Note: "Electrically tuneable spectral responsivity in gated silicon photodiodes" [Appl. Phys. Lett. 99, 231104 (2011)]. Applied Physics Letters, 100(16), p. 169901. (doi: 10.1063/1.4704902)
Bp Corporation North America Inc. and Los Alamos National Security, Llc (2012) System and Method for Underwater Radiography. .
Watson, S. et al. (2012) High Speed GaN Micro-Light-Emitting Diode Arrays for Data Communications. In: Unmanned/Unattended Sensors and Sensor Networks IX, Edinburgh, UK, 26-27 Sept 2012, 85400G. (doi: 10.1117/12.978993)
2011
Abid, K., Wang, X., Khokhar, A. Z., Watson, S., Al-Hasani, S. and Rahman, F. (2011) Electrically tuneable spectral responsivity in gated silicon photodiodes. Applied Physics Letters, 99(23), p. 231104. (doi: 10.1063/1.3665613)
Articles
Ye, S. et al. (2023) 1.55-µm sidewall grating DFB lasers integrated with a waveguide crossing for an optical beam forming network. IEEE Photonics Technology Letters, 35(14), pp. 785-788. (doi: 10.1109/LPT.2023.3278880)
Al-Moathin, A. et al. (2022) EML based on identical epitaxial layer, side-wall grating and HSQ planarization. IEEE Photonics Technology Letters, 34(6), pp. 317-320. (doi: 10.1109/LPT.2022.3155730)
Gwyn, S. et al. (2021) Dynamic device characteristics and linewidth measurement of InGaN/GaN laser diodes. IEEE Photonics Journal, 13(1), 1500510. (doi: 10.1109/JPHOT.2020.3045218)
Di Gaetano, E. , Watson, S. , McBrearty, E. , Sorel, M. and Paul, D.J. (2020) Sub-MHz linewidth 780.24 nm distributed feedback laser for ⁸⁷Rb applications. Optics Letters, 45(13), pp. 3529-3532. (doi: 10.1364/OL.394185)
Cantú, H. I., McKee, A., Ivanov, P., Watson, S. and Kelly, A. E. (2020) The effect of detuned wavelength in the dynamic performance of distributed feedback lasers operating at O band and C band. Microwave and Optical Technology Letters, 62(4), pp. 1466-1470. (doi: 10.1002/mop.32206)
Leitao, M. F. et al. (2019) Pump-power-dependence of CsPbBr₃-in-Cs₄PbBr₆ quantum dot color converter. Optical Materials Express, 9(8), pp. 3504-3518. (doi: 10.1364/OME.9.003504)
Zhang, W. et al. (2019) Optical direct intensity modulation of a 79GHz resonant tunneling diode-photodetector oscillator. Optics Express, 27(12), pp. 16791-16797. (doi: 10.1364/OE.27.016791) (PMID:31252899)
Watson, S. , Zhang, W., Tavares, J., Figueiredo, J., Cantu, H., Wang, J., Wasige, E. , Salgado, H., Pessoa, L. and Kelly, A. (2019) Resonant tunneling diode photodetectors for optical communications. Microwave and Optical Technology Letters, 61(4), pp. 1121-1125. (doi: 10.1002/mop.31689)
Watson, S. , Zhang, W., Tavares, J., Figueiredo, J., Cantu, H., Wang, J., Wasige, E. , Salgado, H., Pessoa, L. and Kelly, A. (2019) Resonant tunneling diode photodetectors for optical communications. Microwave and Optical Technology Letters, 61(4), pp. 1121-1125. (doi: 10.1002/mop.31689)
Slight, T. J. et al. (2018) Continuous-wave operation of (Al,In)GaN distributed-feedback laser diodes with high-order notched gratings. Applied Physics Express, 11(11), 112701. (doi: 10.7567/APEX.11.112701)
Leitao, M. F., Santos, J. M.M., Guilhabert, B., Watson, S. , Kelly, A. E. , Islim, M. S., Haas, H., Dawson, M. D. and Laurand, N. (2017) Gb/s visible light communications with colloidal quantum dot color converters. IEEE Journal of Selected Topics in Quantum Electronics, 23(5), 1900810. (doi: 10.1109/JSTQE.2017.2690833)
Cantú, H.I., McKee, A., Childs, D. , Watson, S. and Kelly, A.E. (2017) Dynamic performance of detuned ridge waveguide AlInGaAs distributed feedback laser diodes. Microwave and Optical Technology Letters, 59(6), pp. 1468-1470. (doi: 10.1002/mop.30561)
Islim, M. S. et al. (2017) Towards 10 Gb/s orthogonal frequency division multiplexing-based visible light communication using a GaN violet micro-LED. Photonics Research, 5(2), A35-A43. (doi: 10.1364/PRJ.5.000A35)
Ferreira, R. X.G. et al. (2016) High bandwidth GaN-based micro-LEDs for multi-Gb/s visible light communications. IEEE Photonics Technology Letters, 28(19), pp. 2023-2026. (doi: 10.1109/LPT.2016.2581318)
Najda, S.P. et al. (2016) AlGaInN laser diode technology for free-space and plastic optical fibre telecom applications. Proceedings of the SPIE: The International Society for Optical Engineering, 9739, 97390U. (doi: 10.1117/12.2207237)
Najda, S. P. et al. (2016) AlGaInN laser diode technology for GHz high-speed visible light communication through plastic optical fiber and water. Optical Engineering, 55(2), 026112. (doi: 10.1117/1.OE.55.2.026112)
Najda, S.P. et al. (2016) Free-space and underwater GHz data transmission using AlGaInN laser diode technology. Proceedings of the SPIE: The International Society for Optical Engineering, 9833, 983309. (doi: 10.1117/12.2208330)
Najda, S., Perlin, P., Marona, L., Leszczyński, M., Czernecki, R., Watson, S. , Kelly, A. E. , Watson, M. A., Blanchard, P. and White, H. (2015) Novel laser diode technology for free-space communications. SPIE Newsroom, (doi: 10.1117/2.1201508.006070)
Herrnsdorf, J. et al. (2015) Active-matrix GaN micro light-emitting diode display with unprecedented brightness. IEEE Transactions on Electron Devices, 62(6), pp. 1918-1925. (doi: 10.1109/TED.2015.2416915)
Santos, J. M. M. et al. (2015) Hybrid GaN LED with capillary-bonded II–VI MQW color-converting membrane for visible light communications. Semiconductor Science and Technology, 30(3), 035012. (doi: 10.1088/0268-1242/30/3/035012)
Tsonev, D. et al. (2014) A 3-Gb/s single-LED OFDM-based wireless VLC link using a gallium nitride µLED. IEEE Photonics Technology Letters, 26(7), pp. 637-640. (doi: 10.1109/LPT.2013.2297621)
Tian, P. et al. (2014) Characteristics and applications of micro-pixelated GaN-based light emitting diodes on Si substrates. Journal of Applied Physics, 115(3), 033112. (doi: 10.1063/1.4862298)
Tian, P., McKendry, J. J.D., Herrnsdorf, J., Watson, S., Ferreira, R., Watson, I. M., Gu, E., Kelly, A. E. and Dawson, M. D. (2014) Temperature-dependent efficiency droop of blue InGaN micro-light emitting diodes. Applied Physics Letters, 105(171107), (doi: 10.1063/1.4900865)
Watson, S., Tan, M., Najda, S. P., Perlin, P., Leszczynski, M., Targowski, G., Grzanka, S. and Kelly, A.E. (2013) Visible light communications using a directly modulated 422 nm GaN laser diode. Optics Letters, 38(19), p. 3792. (doi: 10.1364/OL.38.003792)
Zhang, S., Watson, S., Mckendry, J., Massoubre, D., Cogman, A., Gu, E., Henderson, R., Kelly, A. and Dawson, M. (2013) 1.5 Gbit/s multi-channel visible light communications using CMOS-controlled gaN-based lEDs. Journal of Lightwave Technology, 31(8), pp. 1211-1216. (doi: 10.1109/JLT.2013.2246138)
Zhang, S. et al. (2012) CMOS-controlled color-tunable smart display. IEEE Photonics Journal, 4(5), pp. 1639-1646. (doi: 10.1109/JPHOT.2012.2212181)
Herrnsdorf, J. et al. (2012) Hybrid organic/GaN photonic crystal light-emitting diode. Applied Physics Letters, 101(14), 141122. (doi: 10.1063/1.4757870)
Abid, K., Wang, X., Khokhar, A.Z., Watson, S., Al-Hasani, S. and Rahman, F. (2012) Publisher’s Note: "Electrically tuneable spectral responsivity in gated silicon photodiodes" [Appl. Phys. Lett. 99, 231104 (2011)]. Applied Physics Letters, 100(16), p. 169901. (doi: 10.1063/1.4704902)
Abid, K., Wang, X., Khokhar, A. Z., Watson, S., Al-Hasani, S. and Rahman, F. (2011) Electrically tuneable spectral responsivity in gated silicon photodiodes. Applied Physics Letters, 99(23), p. 231104. (doi: 10.1063/1.3665613)
Conference or Workshop Item
Di Gaetano, E. , Watson, S. , McBrearty, E. , Sorel, M. and Paul, D. J. (2021) Sub-MHz linewidth distributed feedback laser at 780.24-nm emission wavelength for 87Rb applications. Novel In-Plane Semiconductor Lasers XX, 06-12 Mar 2021. ISBN 9781510642454 (doi: 10.1117/12.2582524)
Watson, S. et al. (2018) InGaN/GaN Laser Diodes and their Applications. 20th Anniversary International Conference on Transparent Optical Networks (ICTON 2018), Bucharest, Romania, 1-5 July 2017. ISBN 9781538666043 (doi: 10.1109/ICTON.2018.8473864)
Yadav, A. et al. (2018) InGaN Distributed Feed back Laser with Sidewall Gratings Emitting at 42X nm. 2018 International Conference Laser Optics (ICLO), St. Petersburg, Russia, 4-8 June 2018. p. 606. ISBN 9781538636114 (doi: 10.1109/LO.2018.8435673)
Najda, S. P. et al. (2015) AlGaInN laser diode technology for free-space telecom applications. Free-Space Laser Communication and Atmospheric Propagation XXVII, San Francisco, CA, USA, 7 Feb 2015. 93540Q. (doi: 10.1117/12.2077459)
Najda, S. P. et al. (2015) AlGaInN laser diode technology and systems for defence and security applications. Laser Technology for Defense and Security XI, Baltimore, MD, USA, 20 Apr 2015. p. 946604. (doi: 10.1117/12.2178463)
Conference Proceedings
Kafar, A. et al. (2024) GaN Laser Diodes for Quantum Sensing, Precision Metrology, and Quantum Computing. In: SPIE Quantum West, 2024, San Francisco, CA, U.S.A., 27 Jan -1 Feb 2024, p. 134. (doi: 10.1117/12.2691756)
Watson, S. et al. (2024) 422 nm Distributed Feedback Laser for a Compact Strontium Ion Optical Clock. In: SPIE Quantum West, 2024, San Francisco, CA, U.S.A., 27 Jan -1 Feb 2024, p. 2. (doi: 10.1117/12.3000207)
Najda, S. P. et al. (2023) GaN laser diodes for the development of quantum sensing and timing systems. In: SPIE Photonex 2023, Glasgow, UK, 23-26 Oct 2023, p. 13. (doi: 10.1117/12.2691754)
Watson, S. , Najda, S. P., Perlin, P., Suski, T., Marona, L., Leszczynski, M., Stanczyk, S., Schiavon, D., Slight, T. J. and Kelly, A. E. (2023) Blue Lasers for Optical Wireless Communications. In: 2023 23rd International Conference on Transparent Optical Networks (ICTON), Bucharest, Romania, 02-06 July 2023, pp. 1-4. ISBN 9798350303032 (doi: 10.1109/ICTON59386.2023.10207417)
Coughlan, C., Mirza, M. M.A. , Kirdoda, J. , Dumas, D., Smith, C., McCarthy, C. , Mowbray, H., Watson, S. , Millar, R. and Paul, D. J. (2023) Variation of Sidewall Passivation on Sub-um Selectively Grown Ge-on-Si Devices Towards Single Photon Avalanche Detectors. In: SPIE OPTO 2023, San Francisco, CA, USA, 28 Jan-3 Feb 2023, 124170M. ISBN 9781510659391 (doi: 10.1117/12.2665493)
Millar, R. W. et al. (2021) Pseudo-planar Ge-on-Si Single-photon Avalanche Diode Detector with Record Low Noise-equivalent Power. In: SPIE PHOTONEX, Glasgow, UK, 28 Sep - 01 Oct 2021, (doi: 10.1117/12.2599033)
Al-Moathin, A., Ye, S. , Watson, S. , Di Gaetano, E. , Al-Taai, Q. R. A. , Eddie, I., Li, C., Hou, L. , Kelly, A. and Marsh, J. H. (2021) Electroabsorption Modulated Laser Based on Identical Epitaxial Layer and Transmission Line Technology. In: CLEO/Europe-EQEC 2021, Munich, Germany, 21-25 Jun 2021, ISBN 9781665418768 (doi: 10.1109/CLEO/Europe-EQEC52157.2021.9542103)
Millar, R. W. et al. (2021) Ge-on-Si Single-Photon Avalanche Diode Detectors with Low Noise Equivalent Power in the Short-Wave Infrared. In: 2021 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC), Munich, Germany, 21-25 June 2021, ISBN 9781665418768 (doi: 10.1109/CLEO/Europe-EQEC52157.2021.9542785)
Watson, S. , Di Gaetano, E. , McBrearty, E. , Sorel, M. and Paul, D. J. (2020) Narrow Linewidth Distributed Feedback Diode Lasers for Cooling in Cold Atom Systems. In: CLEO: Applications and Technology 2020, Washington, DC, USA, 10-15 May 2020, AF3I.5. ISBN 9781943580767 (doi: 10.1364/CLEO_AT.2020.AF3I.5)
Watson, S. et al. (2020) Distributed Feedback Lasers for Quantum Cooling Applications. In: 22nd International Conference on Transparent Optical Networks (ICTON), Bari, Italy, 19-23 July 2020, ISBN 9781728184241 (doi: 10.1109/ICTON51198.2020.9203200)
Gwyn, S. et al. (2019) GaN-based Distributed Feedback Laser Diodes for Optical Communications. In: Fourth International Conference on Applications of Optics and Photonics, Lisbon, Portugal, 31 May - 04 Jun 2019, 112070O. ISBN 9781510631632 (doi: 10.1117/12.2527074)
Slight, T. J. et al. (2019) Recent progress in distributed feedback InGaN/GaN laser diodes. In: Novel In-Plane Semiconductor Lasers XVIII, San Francisco, CA, USA, 02-07 Feb 2019, 109390I. ISBN 9781510625204 (doi: 10.1117/12.2507630)
Slight, T. J. et al. (2018) Distributed Feedback InGaN/GaN Laser Diodes. In: Gallium Nitride Materials and Devices XIII - San Francisco, United States, San Francisco, California, United States, 27 Jan-1 Feb 2018, p. 45. ISBN 9781510615496 (doi: 10.1117/12.2285632)
Zhang, W., Watson, S. , Wang, J., Figueiredo, J., Wasige, E. and Kelly, A. E. (2018) Optical Characteristics Analysis of Resonant Tunneling Diode Photodiode Based Oscillators. In: 2018 IEEE 87th Vehicular Technology Conference (VTC Spring), Porto, Portugal, 3-6 June 2018, ISBN 9781538663554 (doi: 10.1109/VTCSpring.2018.8417889)
Leitao, M. F. et al. (2017) MicroLED-pumped Perovskite Quantum Dot Color Converter for Visible Light Communications. In: 2017 IEEE Photonics Conference (IPC), Orlando, FL, USA, 01-05 Oct 2017, pp. 69-70. ISBN 9781509065783 (doi: 10.1109/IPCon.2017.8116011)
Watson, S. , Zhang, W., Wang, J., Al-Khalidi, A. , Cantu, H., Figueiredo, J., Wasige, E. and Kelly, A. E. (2017) Resonant Tunneling Diode Oscillators for Optical Communications. In: Third International Conference on Applications of Optics and Photonics, Faro, Portugal, 08-12 May 2017, 104532Q. ISBN 9781510613836 (doi: 10.1117/12.2276319)
Viola, S., Islim, M. S., Watson, S. , Videv, S., Haas, H. and Kelly, A. E. (2017) 15 Gb/s OFDM-based VLC Using Direct Modulation of 450 GaN Laser Diode. In: Advanced Free-Space Optical Communication Techniques and Applications III, Warsaw, Poland, 11-14 Sep 2017, 104370E. ISBN 9781510613386 (doi: 10.1117/12.2292004)
Giuliano, G. , Viola, S., Watson, S. , Laycock, L., Rowe, D. and Kelly, A. E. (2016) Laser Based Underwater Communication Systems. In: 18th International Conference on Transparent Optical Networks (ICTON), Trento, Italy, 10-14 July 2016, pp. 1-4. ISBN 9781509014675 (doi: 10.1109/ICTON.2016.7550382)
Leitao, M. et al. (2016) Colloidal Quantum Dot and Epitaxial Quantum-Well Platelet Colour-Converters for Visible Light Communication. In: Semiconductor and Integrated Optoelectronics (SIOE'16), Cardiff, Wales, 5-7 Apr 2016,
Najda, S. P. et al. (2016) AlGaInN Laser Diode Technology for Systems Applications. In: Gallium Nitride Materials and Devices XI, San Francisco, CA, USA, 15-18 Feb 2016, p. 974819. ISBN 9781628419832 (doi: 10.1117/12.2207231)
Santos, J.M. et al. (2016) Colloidal Quantum Dot Color Converters for Visible Light Communications. In: 2016 IEEE Photonics Conference (IPC), Waikoloa, HI, USA, 2-6 Oct 2016, pp. 396-397. ISBN 9781509019069 (doi: 10.1109/IPCon.2016.7831155)
Watson, S. et al. (2016) High Speed Visible Light Communication Using Blue GaN Laser Diodes. In: Advanced Free-Space Optical Communication Techniques and Applications II, Edinburgh, UK, 26-29 Sept 2016, 99910A. (doi: 10.1117/12.2245495)
Herrnsdorf, J., McKendry, J. J.D., Ferreira, R., Henderson, R., Videv, S., Watson, S. , Haas, H., Kelly, A. E. , Gu, E. and Dawson, M. D. (2015) Single-Chip Discrete Multitone Generation. In: 2015 Summer Topicals Meeting Series (SUM), Nassau, Bahamas, 13-15 Jul 2015, pp. 47-48. ISBN 9781479974689 (doi: 10.1109/PHOSST.2015.7248185)
McKendry, J. D., Tsonev, D., Ferreira, R., Videv, S., Griffiths, A. D., Watson, S. , Gu, E., Kelly, A. E. , Haas, H. and Dawson, M. D. (2015) Gb/s Single-LED OFDM-Based VLC Using Violet and UV Gallium Nitride μLEDs. In: 2015 IEEE Summer Topicals Meeting Series (SUM), Nassau, Bahamas, 13-15 July 2015, pp. 175-176. ISBN 9781479974689 (doi: 10.1109/PHOSST.2015.7248252)
Najda, S. P. et al. (2015) Advances in Single Mode and High Power AlGaInN Laser Diode Technology for Systems Applications. In: Gallium Nitride Materials and Devices X, San Francisco, CA, USA, 07 Feb 2015, 93631A. (doi: 10.1117/12.2076268)
Najda, S. P. et al. (2015) AlGaInN laser diode technology and systems for defence and security applications. In: Electro-Optical Remote Sensing, Photonic Technologies, and Applications IX, 96490P. ISBN 9781628418590 (doi: 10.1117/12.2193381)
Santos, J.M.M., Watson, S. , Guilhabert, B., Krysa, A., Kelly, A.E. , Laurand, N. and Dawson, M. D. (2015) MQW Nanomembrane Assemblies for Visible Light Communications. In: 2015 Photonics Conference (IPC), Reston, VA, USA, 04-08 Oct 2015, pp. 523-524. ISBN 9781479974658 (doi: 10.1109/IPCon.2015.7323489)
Watson, S. , Najda, S. P., Perlin, P., Leszczynski, M., Targowski, G., Grzanka, S., Watson, M. A., White, H. and Kelly, A. E. (2015) Multi-Gigabit Data Transmission Using a Directly Modulated Gan Laser Diode for Visible Light Communication Through Plastic Optical Fiber and Water. In: 2015 IEEE Summer Topicals Meeting Series (SUM), Nassau, Bahamas, 13-15 July 2015, pp. 224-225. ISBN 9781479974689 (doi: 10.1109/PHOSST.2015.7248278)
Najda, S. P. et al. (2014) Advances in AlGaInN Laser Diode Technology. In: Gallium Nitride Materials and Devices IX, San Francisco, CA, USA, 1 Feb 2014, 89861O. (doi: 10.1117/12.2039253)
Najda, S. P. et al. (2014) AlGaInN Laser Diode Technology for Defence, Security and Sensing Applications. In: Emerging Technologies in Security and Defence II; and Quantum-Physics-based Information Security III, Amsterdam, The Netherlands, 22 Sept 2014, 92540Z. (doi: 10.1117/12.2072172)
Watson, M. A. et al. (2014) Assessment of Laser Tracking and Data Transfer for Underwater Optical Communications. In: Unmanned/Unattended Sensors and Sensor Networks X, Amsterdam, The Netherlands, 22 Sept 2014, 92480T. (doi: 10.1117/12.2073675)
Tian, P. et al. (2013) Characteristics and Applications of InGaN Micro-Light Emitting Diodes on Si Substrates. In: 2013 IEEE Photonics Conference (IPC), Bellevue, WA, USA, 8-12 Sep 2013, pp. 97-98. ISBN 9781457715068 (doi: 10.1109/IPCon.2013.6656387)
Najda, S. P. et al. (2013) Advances in AlGaInN Laser Diode Technology for Defence Applications. In: Emerging Technologies in Security and Defence; and Quantum Security II; and Unmanned Sensor Systems X, Dresden, Germany, 23-26 Sep 2013, 88990B. (doi: 10.1117/12.2028717)
Najda, S.P. et al. (2013) Advances in Single Mode, High Frequency and High Power AlGaInN Laser Diodes. In: 2013 Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR), Kyoto, Japan, 30 Jun - 04 Jul 2013, ISBN 9781467364768 (doi: 10.1109/CLEOPR.2013.6600214)
Watson, S., Tan, M., Najda, S. P., Perlin, P., Leszczynski, M., Targowski, G., Grzanka, S. and Kelly, A.E. (2013) High frequency modulation of a 422 nm GaN laser diode. In: 15th International Conference on Transparent Optical Networks (ICTON 2013), Cartagena, Spain, 23-27 Jun 2013, pp. 1-4. (doi: 10.1109/ICTON.2013.6602765)
Zhang, S. et al. (2012) Directly color-tunable smart display based on a CMOS-controlled micro-LED array. In: 2012 IEEE Photonics Conference (IPC), Burlingame, CA, USA, 23-27 Sep 2012, pp. 435-436. ISBN 9781457707315 (doi: 10.1109/IPCon.2012.6358679)
Zhang, S., Watson, S., Mckendry, J. J.D., Massoubre, D., Cogman, A., Gu, E., Henderson, R., Kelly, A. and Dawson, M. (2012) High-bandwidth parallel data transmission using GaN/CMOS micro-LED arrays. In: 2012 IEEE Photonics Conference (IPC), Burlingame, CA, USA, 23-27 Sep 2012, pp. 38-39. ISBN 9781457707315 (doi: 10.1109/IPCon.2012.6358477)
Watson, S. et al. (2012) High Speed GaN Micro-Light-Emitting Diode Arrays for Data Communications. In: Unmanned/Unattended Sensors and Sensor Networks IX, Edinburgh, UK, 26-27 Sept 2012, 85400G. (doi: 10.1117/12.978993)
Patents
Los Alamos National Security, Llc (2014) High-Sensitivity, High-Speed Continuous Imaging System. .
Bp Corporation North America Inc. and Los Alamos National Security, Llc (2012) System and Method for Underwater Radiography. .
Supervision
- Cai, Shuqiao
Blue lasers for underwater optical wireless communications - Yamsiri, Anoma
Towards an active photonic thermometer
Teaching
- Digital Signal Processing (ENG5027)
Professional activities & recognition
Prizes, awards & distinctions
- 2016: Awarded at my PhD graduation "in recognition of outstanding research by a postgraduate student in the School of Engineering (Dr. Alan Stirling Brown Prize)
Professional & learned societies
- Member, SPIE
- Member, IEEE
Selected international presentations
- 2024: SPIE Photonics West (San Francisco, USA)
- 2023: International Conference on Transparent Optical Networks (ICTON) (Bucharest, Romania)
- 2020: International Conference on Transparent Optical Networks (ICTON) (Online)
- 2020: CLEO (Online)
- 2019: International Conference on Transparent Optical Networks (ICTON) (Angers, France)
- 2018: International Conference on Transparent Optical Networks (ICTON) (Bucharest, Romania)
- 2017: International Conference on Applications of Optics and Photonics (Faro, Portugal)
- 2016: SPIE Photonics West (San Francisco, USA)
- 2013: International Conference on Transparent Optical Networks (ICTON) (Cartagena, Spain)
- 2012: SPIE Security & Defence (Edinburgh, UK)
Supplementary
- h-index : 19, i-index: 28 (Google Scholar)
Research datasets
2020
Di Gaetano, E. , Watson, S. , McBrearty, E. , Sorel, M. and Paul, D. (2020) Sub-MHz linewidth 780.24 nm distributed feedback laser for ⁸⁷Rb applications. [Data Collection]