Dr Maciej Sypek, Orteh, will be visiting the School of Engineering. As part of his visit he will deliver a seminar entitled, "THz Diffractive Optics for Practical Applications". Abstract and biography are given below.

Date & Time: 12:00, Tuesday, 28th March
Venue: Room 514, Rankine Building

Abstract

The performance of modern THz systems can be improved by the use of sophisticated optics. Such optical elements can be used for better coupling of the THz radiation into detectors as well as for controlling beam profiles from THz emitters. Many THz sources can emit narrowband, spatially coherent radiation. In such cases the use of diffractive optics is feasible. Additionally, such optics can be utilized together with matrices of detectors. Different topologies of matrices with detectors can work as focal plane arrays (FPA), standard linear sensors, enhanced spatial resolution sensors or moth-eye like elements. The Orteh Company designs and manufactures standard matrices of detectors based on field-effect transistors (FETs) with signal processing done by fast FPGA circuits. The typical multiplexing technique is replaced by parallel pixel processing. This innovative solution enables utilization of the separate lock-in for each pixel to enlarge the dynamics and sensitivity for the registered signal. The static mode solution provides extremely fast image acquisition. Different modules are scalable and flexible and can be used in many applications for medicine, defense, security, avionics, nondestructive inspection etc. Several THz optical setups composed of diffractive elements and detector modules will be described, including specific designs and applications. Theoretical background, numerical simulations and practical applications will also be presented.

Biography

Maciej Sypek received his M.Sc., Ph.D. and habilitation degrees from the Warsaw University of Technology in 1987, 1992 and 2009, respectively. He is now the CEO of the Polish innovative company Orteh active in the areas of information technologies and optics. He deals with optical design and numerical simulations of propagation electromagnetic radiation in demanding configurations from the extreme ultra-violet to the terahertz range. He is an expert in the design and characterization of subwavelength elements. He is an author or co-author of more than 50 articles published in peer-reviewed scientific journals.

First published: 20 March 2017

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