Terahertz time-domain spectroscopy of MBE-grown GaAs/AlGaAs asymmetric double quantum wells

Authors

Neil Irvin F. Cabello ⋅ PH National Institute of Physics, University of the Philippines Diliman
Mae Agatha C. Tumanguil-Quitoras ⋅ PH Materials Science and Engineering Program, University of the Philippines Diliman
Hannah R. Bardolaza ⋅ PH National Institute of Physics, University of the Philippines Diliman
Lean L. Dasallas ⋅ PH Materials Science and Engineering Program, University of the Philippines Diliman
Elizabeth Ann P. Prieto ⋅ PH Materials Science and Engineering Program, University of the Philippines Diliman
Armando S. Somintac ⋅ PH National Institute of Physics, University of the Philippines Diliman
Arnel A. Salvador ⋅ PH National Institute of Physics, University of the Philippines Diliman
Elmer S. Estacio ⋅ PH National Institute of Physics, University of the Philippines Diliman
Alexander E. De Los Reyes ⋅ PH National Institute of Physics, University of the Philippines Diliman

Abstract

We study the THz emission characteristics of molecular beam epitaxy-grown GaAs/AlGaAs coupled (CADQW) and uncoupled asymmetric double quantum wells (UADQW). We found the THz emission from the CADQW and UADQW samples to be comparable to the THz emission from p-InAs and higher than p-GaAs and n-GaAs. Furthermore, we observe higher THz emission from the CADQW as compared to the UADQW. This is attributed to the tunneling of electrons in the CADQW leading to a larger dipole moment. These results are important for the development of double quantum wells as possible intense THz radiation sources.

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Issue

2022: Proceedings of the 40th Samahang Pisika ng Pilipinas Physics Conference

Article ID

SPP-2022-1E-06

Section

Condensed Matter Physics and Materials Science

Published

2022-10-12

How to Cite

[1]

NIF Cabello, MAC Tumanguil-Quitoras, HR Bardolaza, LL Dasallas, EAP Prieto, AS Somintac, AA Salvador, ES Estacio, and AE De Los Reyes, Terahertz time-domain spectroscopy of MBE-grown GaAs/AlGaAs asymmetric double quantum wells, Proceedings of the Samahang Pisika ng Pilipinas 40, SPP-2022-1E-06 (2022). URL: https://proceedings.spp-online.org/article/view/SPP-2022-1E-06.