Modified rate equations model for tunneling in GaAs/AlGaAs asymmetric coupled quantum wells

Authors

Rafael Jaculbia ⋅ PH National Institute of Physics, University of the Philippines Diliman
Maria Herminia Balgos ⋅ PH National Institute of Physics, University of the Philippines Diliman
Michael Defensor ⋅ PH National Institute of Physics, University of the Philippines Diliman
Karim Omambac ⋅ PH National Institute of Physics, University of the Philippines Diliman
Arnel Salvador ⋅ PH National Institute of Physics, University of the Philippines Diliman
Armando Somintac ⋅ PH National Institute of Physics, University of the Philippines Diliman

Abstract

We modify the rate equations model for the time resolved spectra of GaAs/AlGaAs asymmetric coupled quantum wells (ACQW) to include tunneling effects. The modification takes into account the stoppage of tunneling after a certain maximum number of carriers tunnel from the narrow well to the wide well, which is a direct consequence of effective mass filtering. To check the validity of the modification, we apply the model to the TRPL spectra of GaAs/AlGaAs ACQW. Results show a good fit between the experimental data and the model. The model also gives values of the tunneling and recombination time constants which are of the same order as what is expected for the structures investigated.

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Issue

2011: Proceedings of the 29th Samahang Pisika ng Pilipinas National Physics Congress

Article ID

SPP2011-PB-9

Section

Poster Session PB

Published

2011-10-24

How to Cite

[1]

R Jaculbia, MH Balgos, M Defensor, K Omambac, A Salvador, and A Somintac, Modified rate equations model for tunneling in GaAs/AlGaAs asymmetric coupled quantum wells, Proceedings of the Samahang Pisika ng Pilipinas 29, SPP2011-PB-9 (2011). URL: https://proceedings.spp-online.org/article/view/SPP2011-PB-9.