Excitation and bias voltage-dependence of the terahertz emission from low-temperature-grown photoconductive antenna devices at different temperatures

Authors

Lourdes Nicole F. Dela Rosa ⋅ PH National Institute of Physics, University of the Philippines Diliman
Vince Paul P. Juguilon ⋅ PH National Institute of Physics, University of the Philippines Diliman
Ivan Cedrick M. Verona ⋅ PH National Institute of Physics, University of the Philippines Diliman
Alexander E. De Los Reyes ⋅ PH National Institute of Physics, University of the Philippines Diliman
Hannah R. Bardolaza ⋅ PH National Institute of Physics, University of the Philippines Diliman
Elmer S. Estacio ⋅ PH National Institute of Physics, University of the Philippines Diliman

Abstract

We investigated the temperature dependence of the terahertz (THz) emission in a low-temperature grown gallium arsenide (LT-GaAs) photoconductive antenna (PCA) via an equivalent circuit model (ECM) that accounts for the PCA carrier dynamics. A parametric analysis was done by varying either the laser power or the voltage bias whilst taking all the other parameters constant. Results show that increasing the operating temperature decreases the THz emission intensity, and bandwidth. The THz peak amplitude exhibit a linear trend at low power and voltage values. When the material's voltage breakdown is not considered, at low temperatures a higher bias could be applied to the PCA before voltage screening and carrier velocity saturation occur. Insights from this work contribute to the design optimization of PCA systems to increase overall efficiency.

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Issue

2023: Proceedings of the 41st Samahang Pisika ng Pilipinas Physics Conference

Article ID

SPP-2023-3F-06

Section

Condensed Matter Physics and Materials Science

Published

2023-07-13

How to Cite

[1]

LNF Dela Rosa, VPP Juguilon, ICM Verona, AE De Los Reyes, HR Bardolaza, and ES Estacio, Excitation and bias voltage-dependence of the terahertz emission from low-temperature-grown photoconductive antenna devices at different temperatures, Proceedings of the Samahang Pisika ng Pilipinas 41, SPP-2023-3F-06 (2023). URL: https://proceedings.spp-online.org/article/view/SPP-2023-3F-06.