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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Published

2022-10-12

Issue

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

Section

Condensed Matter Physics and Materials Science

License

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How to Cite

[1]
“Terahertz time-domain spectroscopy of MBE-grown GaAs/AlGaAs asymmetric double quantum wells”, Proc. SPP, vol. 40, no. 1, pp. SPP–2022, Oct. 2022, Accessed: Apr. 14, 2026. [Online]. Available: https://proceedings.spp-online.org/article/view/SPP-2022-1E-06