Band-to-Band Transitions in InAs/GaSb Multi-Quantum-Well Structures Using k.p Theory: Effects of Well/Barrier Width and Temperature

S. Bahareh Seyedein Ardebili, Jong Su Kim (), Jaedu Ha, Tae In Kang, Behnam Zeinalvand Farzin, Yeongho Kim and Sang Jun Lee
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S. Bahareh Seyedein Ardebili: Department of Physics, Yeungnam University, Gyeongsan 38541, Republic of Korea
Jong Su Kim: Department of Physics, Yeungnam University, Gyeongsan 38541, Republic of Korea
Jaedu Ha: Department of Physics, Yeungnam University, Gyeongsan 38541, Republic of Korea
Tae In Kang: Department of Physics, Yeungnam University, Gyeongsan 38541, Republic of Korea
Behnam Zeinalvand Farzin: Department of Physics, Yeungnam University, Gyeongsan 38541, Republic of Korea
Yeongho Kim: Korea Research Institute of Standards and Science, Daejeon 34113, Republic of Korea
Sang Jun Lee: Korea Research Institute of Standards and Science, Daejeon 34113, Republic of Korea

Energies, 2023, vol. 16, issue 3, 1-16

Abstract: We investigated the conduction- and valence-confined energy levels and first band-to-band transition energies of a type-II InAs/GaSb multi-quantum-well at 77 K and room temperature for various well and barrier thicknesses. We calculated the electron and hole confined energies based on Kane’s eight-band k.p formalism. We also explored the effect of the barrier width on the wells’ interactions, which was negligible for wells with a width wider than 30 nm. Moreover, we proposed a single exponential function to predict the first transition energies without considering the complex approach of k.p theory. Then, we measured the photoluminescence spectra of the manufactured samples, including thin wells (1, 2, and 3 monolayers) and wide barriers (50 nm). Finally, we made comparisons between the theoretical band-to-band transition energies for k z = 0 and experimental results from the photoluminescence spectra for different well thicknesses at 77 and 300 K.

Keywords: InAs/GaSb multi-quantum-well structure; eight-band k.p theory; finite difference method; first transition energy; photoluminescence (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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