Improvement of terahertz emission in gallium arsenide photoconductive antennas coated with silicon nanowires via dropcasting

Authors

Neil Irvin Cabello ⋅ PH National Institute of Physics, University of the Philippines Diliman
Alexander De Los Reyes ⋅ PH National Institute of Physics, University of the Philippines Diliman
Vladimir Sarmiento ⋅ PH Materials Science and Engineering Program, University of the Philippines Diliman
John Paul Ferrolino ⋅ PH Materials Science and Engineering Program, University of the Philippines Diliman
Victor DC Andres Vistro ⋅ PH National Institute of Physics, University of the Philippines Diliman
John Daniel Vasquez ⋅ PH Materials Science and Engineering Program, University of the Philippines Diliman
Hannah Bardolaza ⋅ PH National Institute of Physics, University of the Philippines Diliman
Hideaki Kitahara ⋅ JP Research Center for Development of Far-Infrared Region, University of Fukui, Japan
Masahiko Tani ⋅ PH Research Center for Development of Far-Infrared Region, University of Fukui, Japan
Arnel Salvador ⋅ PH National Institute of Physics, University of the Philippines Diliman
Armando Somintac ⋅ PH National Institute of Physics, University of the Philippines Diliman
Elmer Estacio ⋅ PH National Institute of Physics, University of the Philippines Diliman

Abstract

We report on the enhancement in the terahertz (THz) emission of a gallium arsenide (GaAs) photoconductive antenna (PCAs) coated with silicon nanowires (SiNWs). The SiNWs were synthesized using metal-assisted chemical etching, and applied onto the PCAs by dropcasting. The THz emission from the SiNW-coated PCA was observed to have up to three times peak-to-peak THz-TDS waveform enhancement over its uncoated counterpart. A possible origin for the enhancement is the improved light-trapping and photoabsorption in the SiNW-coated sample, but is currently unable to completely account for it.

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Issue

2021: Proceedings of the 39th Samahang Pisika ng Pilipinas Physics Conference

Article ID

SPP-2021-PA-02

Section

Poster Session A (Condensed Matter Physics and Materials Science)

Published

2021-10-01

How to Cite

[1]

NI Cabello, A De Los Reyes, V Sarmiento, JP Ferrolino, VDA Vistro, JD Vasquez, H Bardolaza, H Kitahara, M Tani, A Salvador, A Somintac, and E Estacio, Improvement of terahertz emission in gallium arsenide photoconductive antennas coated with silicon nanowires via dropcasting, Proceedings of the Samahang Pisika ng Pilipinas 39, SPP-2021-PA-02 (2021). URL: https://proceedings.spp-online.org/article/view/SPP-2021-PA-02.