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

Authors

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