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 In_xGa_1−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 In_xGa_1−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.

Issue

2025: Proceedings of the 43rd Samahang Pisika ng Pilipinas Physics Conference

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.