Print Email Facebook Twitter Time-Domain Equivalent Circuits for the Link Modeling Between Pulsed Photoconductive Sources and Receivers Title Time-Domain Equivalent Circuits for the Link Modeling Between Pulsed Photoconductive Sources and Receivers Author Zhang, H. (TU Delft Tera-Hertz Sensing) Llombart, Nuria (TU Delft Tera-Hertz Sensing) Bueno Lopez, J. (TU Delft Electronics) Freni, Angelo (University of Florence) Date 2024 Abstract Photoconductive antennas (PCAs) are promising candidates for sensing and imaging applications. In recent years, our group has investigated their properties under pulsed laser illumination in transmission using a time-domain (TD) Norton equivalent circuit. Here, we extend this analysis to the link between a photoconductive source and a receiver introducing for the latter a second TD Norton equivalent circuit. We also evaluate the transfer function of a dispersive quasi-optical (QO) link. Specifically, a field correlation approach based on the high-frequency techniques is used to evaluate the spectral transfer function between two bow-tie-based PCAs, including the QO link. The detected currents in the receiving circuit are reconstructed using stroboscopic sampling of the modeled THz pulses, equivalent to what is actually performed by THz TD systems. Both the amplitude and the waveforms of these currents are evaluated. The QO link is then experimentally characterized to validate the proposed methodology. The comparison between the simulations and the measurements is excellent. Subject Bow-tie antennafield correlationNorton equivalent circuitphotoconductive antennasquasi-optical link To reference this document use: http://resolver.tudelft.nl/uuid:6f18ada7-08bd-4dd3-ba3e-8bd1cbba156e DOI https://doi.org/10.1109/TTHZ.2024.3364768 Embargo date 2024-08-19 ISSN 2156-342X Source IEEE Transactions on Terahertz Science and Technology, 14 (3), 311-326 Bibliographical note 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. Part of collection Institutional Repository Document type journal article Rights © 2024 H. Zhang, Nuria Llombart, J. Bueno Lopez, Angelo Freni Files file embargo until 2024-08-19