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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Published

2021-10-01

Issue

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

Section

Poster Session A (Condensed Matter Physics and Materials Science)

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How to Cite

[1]
“Improvement of terahertz emission in gallium arsenide photoconductive antennas coated with silicon nanowires via dropcasting”, Proc. SPP, vol. 39, no. 1, p. SPP-2021-PA-02, Oct. 2021, Accessed: Apr. 03, 2026. [Online]. Available: https://proceedings.spp-online.org/article/view/SPP-2021-PA-02