Enhancement of terahertz emission of semi-insulating gallium arsenide via zinc oxide thin film surface modification

  • Archel Susvilla Escaro National Institute of Physics, University of the Philippines Diliman
  • Erick John Carlo Solibet National Institute of Physics, University of the Philippines Diliman
  • Raymund Veloz National Institute of Physics, University of the Philippines Diliman
  • Neil Irvin Cabello National Institute of Physics, University of the Philippines Diliman
  • Miguel Bacaoco National Institute of Physics, University of the Philippines Diliman
  • Lorenzo Lopez, Jr. National Institute of Physics, University of the Philippines Diliman
  • Maria Angela Faustino National Institute of Physics, University of the Philippines Diliman
  • Alexander De Los Reyes National Institute of Physics, University of the Philippines Diliman
  • Arven Cafe National Institute of Physics, University of the Philippines Diliman
  • Elmer Estacio National Institute of Physics, University of the Philippines Diliman
  • Armando Somintac National Institute of Physics, University of the Philippines Diliman
  • Arnel Salvador National Institute of Physics, University of the Philippines Diliman

Abstract

This study reports on the Terahertz (THz) emission of semi-insulating Gallium Arsenide (GaAs) substrate coated with Zinc Oxide (ZnO) thin film via spray pyrolysis. Using a reflection-mode THZ time domain spectroscopy (TDS), it was shown  that enhancement in the THZ emission was observed with ZnO-coated SI-GaAs compared to the bare substrate. The enhancement is partly attributed to the decreased reflectivity due to the  modification of the surface by addition of a ZnO thin film on the GaAs substrate which translates to higher photon absorbance of the material. 

Published
2017-06-07
How to Cite
[1]
A. Escaro, E. J. C. Solibet, R. Veloz, N. I. Cabello, M. Bacaoco, L. Lopez, M. A. Faustino, A. De Los Reyes, A. Cafe, E. Estacio, A. Somintac, and A. Salvador. Enhancement of terahertz emission of semi-insulating gallium arsenide via zinc oxide thin film surface modification, Proceedings of the Samahang Pisika ng Pilipinas 35, SPP-2017-PA-03 (2017). URL: https://paperview.spp-online.org/proceedings/article/view/244.
Section
Poster Session A (Materials Science, Instrumentation, and Photonics)