Time-Domain Modelling of Pulsed Photoconducting Sources - Part I

Time-Domain Modelling of Pulsed Photoconducting Sources - Part I: The Norton Equivalent Circuit

Neto, A. (TU Delft Tera-Hertz Sensing)
Llombart, Nuria (TU Delft Tera-Hertz Sensing)
Freni, Angelo (University of Florence)

2023

In the circuit theory, the Norton and Thevenin equivalent generators are tools that simplify the solutions of networks involving passive or active components. They have been extensively used in the frequency domain to describe time-harmonic sources. A time-stepped evolution is instead typically used to include transient sources. As a particular case of the latter, the Norton equivalent circuit is extended here to investigate pulsed photoconducting sources, where a dc bias voltage and a pulsed optical laser are combined to generate terahertz (THz) bursts. The proposed derivation relies on the application of the electromagnetic (EM) equivalence theorem. The main conclusion of this derivation is the understanding that, from the three different spectral regions (dc, THz, and optics), only the THz radiation is to be explicitly included in the equivalent circuit. The theory is validated by a campaign of measurements reported in a connected paper.

Equivalence theorem
Norton equivalent circuit
photoconductive (PC) sources

http://resolver.tudelft.nl/uuid:87e1af3f-f159-4783-975d-e1c957f5d74d

https://doi.org/10.1109/TAP.2022.3184517

2023-03-27

0018-926X

IEEE Transactions on Antennas and Propagation, 71 (3), 2527-2535

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. Neto, Nuria Llombart, Angelo Freni