Time domain circuit representation of photoconductive gaps in antennas for pulsed terahertz time domain systems

Conference paper (2019)

Authors

A. Fiorellini Bernardis Tera-Hertz Sensing - EEMCS
P.M. Sberna EKL Equipment - EEMCS
A. Neto Tera-Hertz Sensing - EEMCS
Nuria Llombart Tera-Hertz Sensing - EEMCS
Research Group
EKL Equipment (EEMCS) (TU Delft)
Copyright: © 2019 A. Fiorellini Bernardis, P.M. Sberna, A. Neto, Nuria Llombart
DOI: https://doi.org/10.1109/IRMMW-THz.2019.8874557
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Published Date

01-09-2019

Language

English

Reuse Rights

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Else Kooi Laboratory

Research Group

EKL Equipment

Abstract

Pulsed terahertz time-domain systems rely on antennas printed on photoconductive substrates (PCA), which show extremely fast conductivity transients when illuminated by femto-seconds laser pulses. This work introduces a time domain representation of the PCA transmitter that accounts for time evolving voltages at the terminals of the photoconductive gap; such model is able to explain the saturation phenomena observed in measurements performed under high power laser excitations that previous models could not account for.

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