Structural and ultrafast characteristics of LTG-InGaAs photoconductive antennas in-situ annealed at 600°C

Authors

  • Gerald Angelo Catindig ⋅ PH National Institute of Physics, University of the Philippines Diliman, Philippines
  • Hannah Bardolaza ⋅ PH National Institute of Physics, University of the Philippines Diliman, Philippines
  • Kristiene Joy Fernandez ⋅ PH National Institute of Physics, University of the Philippines Diliman, Philippines
  • Dean Von Johari Narag ⋅ PH Materials Science and Engineering Program, University of the Philippines Diliman, Philippines
  • Jonel Francisco ⋅ PH Materials Science and Engineering Program, University of the Philippines Diliman, Philippines
  • Craig Egan Allistair Tan ⋅ PH National Institute of Physics, University of the Philippines Diliman, Philippines
  • Roni Andig ⋅ PH National Institute of Physics, University of the Philippines Diliman, Philippines
  • Gian Carlo Carrillo ⋅ PH Materials Science and Engineering Program, University of the Philippines Diliman, Philippines
  • Mae Agatha Tumanguil ⋅ PH Materials Science and Engineering Program, University of the Philippines Diliman, Philippines
  • Earl Conan Casalme ⋅ PH Materials Science and Engineering Program, University of the Philippines Diliman, Philippines
  • Lourdes Nicole Dela Rosa ⋅ PH National Institute of Physics, University of the Philippines Diliman, Philippines
  • Ivan Cedrick Verona ⋅ PH National Institute of Physics, University of the Philippines Diliman, Philippines
  • Eros Henry Jay Acosta ⋅ PH National Institute of Physics, University of the Philippines Diliman, Philippines
  • Jose Marie Sebastian Arcilla ⋅ PH National Institute of Physics, University of the Philippines Diliman, Philippines
  • John Paul Ferrolino ⋅ PH Materials Science and Engineering Program, University of the Philippines Diliman, Philippines
  • Hideaki Kitahara ⋅ JP Research Center for the Development of the Far Infrared Region, University of Fukui, Japan
  • Masahiko Tani ⋅ JP Research Center for the Development of the Far Infrared Region, University of Fukui, Japan
  • Armando Somintac ⋅ PH National Institute of Physics, University of the Philippines Diliman, Philippines
  • Elmer Estacio ⋅ PH National Institute of Physics, University of the Philippines Diliman, Philippines
  • Arnel Salvador ⋅ PH National Institute of Physics, University of the Philippines Diliman, Philippines

Abstract

We demonstrate the growth, device fabrication, and characterization on indium gallium arsenide InxGa1−xAs thin films grown at 175°C (350°C) and in-situ annealed at 600°C. X-ray diffraction measurements reveal that the indium mole fraction (band gap) of the grown InxGa1−xAs films are 0.465 (0.788 eV) and 0.364 (0.905 eV) for the 175°C and 350°C grown thin films, respectively. The terahertz (THz) emission from the fabricated PCAs reveals that the film grown at 175°C is consistently stronger than the THz emission of the film grown at 350°C for excitation powers ranging between 9 and 90 mW. We compare the characterization results of the thin films and relate the results to material properties like carrier mobility and band gap.

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Issue

Entangled!
25-28 June 2025, National Institute of Physics, University of the Philippines Diliman

Please visit the SPP2025 activity webpage for more information on this year's Physics Congress.

Article ID

SPP-2025-PA-11

Section

Poster Session PA (Photonics, Condensed Matter, Materials and Quantum Science)

Published

2025-06-16

How to Cite

[1]
GA Catindig, H Bardolaza, KJ Fernandez, DVJ Narag, J Francisco, CEA Tan, R Andig, GC Carrillo, MA Tumanguil, EC Casalme, LN Dela Rosa, IC Verona, EHJ Acosta, JMS Arcilla, JP Ferrolino, H Kitahara, M Tani, A Somintac, E Estacio, and A Salvador, Structural and ultrafast characteristics of LTG-InGaAs photoconductive antennas in-situ annealed at 600°C, Proceedings of the Samahang Pisika ng Pilipinas 43, SPP-2025-PA-11 (2025). URL: https://proceedings.spp-online.org/article/view/SPP-2025-PA-11.