Time-Domain Modelling of Pulsed Photoconducting Sources - Part II

Time-Domain Modelling of Pulsed Photoconducting Sources - Part II: Characterization of an LT GaAs Bow-Tie Antenna

Fiorellini Bernardis, A. (TU Delft Tera-Hertz Sensing)
Sberna, P.M. (TU Delft EKL Processing)
Bueno Lopez, J. (TU Delft Electronics)
Zhang, H. (TU Delft Tera-Hertz Sensing)
Llombart, Nuria (TU Delft Tera-Hertz Sensing)
Neto, A. (TU Delft Tera-Hertz Sensing)

2023

Drude's description of the response of low-temperature gallium arsenide to optical pulse excitation is used to evaluate the components of a time-domain Norton equivalent circuit of a photoconductive antenna (PCA) source. The saturation of the terahertz (THz) radiated power occurring at large optical excitation levels was previously associated by the scientific community to radiation and charge screening of the bias. With the present circuit, we are able to model accurately the measured saturation as only due to the EM feedback from the antenna to the bias. The predicted THz radiated power is shown to match very accurately the measurements when the circuit is combined with an accurate description of the experimental conditions and the modeling of the THz quasi-optical (QO) channel.

Equivalent circuit
photoconductive antennas (PCAs)
terahertz (THz)
THz radiated power
THz sources
THz technology

http://resolver.tudelft.nl/uuid:cf5f6e05-9cd3-4ad5-a494-fe8968d73c34

https://doi.org/10.1109/TAP.2023.3236763

2023-07-19

0018-926X

IEEE Transactions on Antennas and Propagation, 71 (3), 2536-2545

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Institutional Repository

journal article

© 2023 A. Fiorellini Bernardis, P.M. Sberna, J. Bueno Lopez, H. Zhang, Nuria Llombart, A. Neto