Piezoelectric and deformation potential effects of strain-dependent luminescence in semiconductor quantum well structures

Aihua Zhang, Mingzeng Peng, Morten Willatzen, Junyi Zhai, Zhong Lin Wang

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The mechanism of strain-dependent luminescence is important for the rational design of pressure-sensing devices. The interband momentum-matrix element is the key quantity for understanding luminescent phenomena. We analytically solved an infinite quantum well (IQW) model with strain, in the framework of the 6 × 6 k·p Hamiltonian for the valence states, to directly assess the interplay between the spin-orbit coupling and the strain-induced deformation potential for the interband momentum-matrix element. We numerically addressed problems of both the infinite and IQWs with piezoelectric fields to elucidate the effects of the piezoelectric potential and the deformation potential on the strain-dependent luminescence. The experimentally measured photoluminescence variatio½n as a function of pressure can be qualitatively explained by the theoretical results.
Original languageEnglish
Article number134–144
JournalNano Research
Volume10
Issue number1
Number of pages11
ISSN1998-0124
DOIs
Publication statusPublished - 2017

Keywords

  • Piezoelectric potential
  • Deformation potential
  • Luminescence
  • Quantum well

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