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
Selected publications
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)
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)
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)
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)
All publications
2023
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
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]