Optical and Quantum Electronics

, Volume 47, Issue 4, pp 865–872

Cubic GaN/AlGaN based quantum wells optimized for applications to tunable mid-infrared photodetectors

  • A. Radosavljević
  • J. Radovanović
  • V. Milanović
  • D. Indjin
Article

DOI: 10.1007/s11082-014-0016-y

Cite this article as:
Radosavljević, A., Radovanović, J., Milanović, V. et al. Opt Quant Electron (2015) 47: 865. doi:10.1007/s11082-014-0016-y

Abstract

We propose a method which delivers optimal cubic GaN/AlGaN quantum well profiles such that both the Stark effect and peak intersubband absorption from the ground to the first excited electronic state, in a prescribed range of bias electric fields, are maximized. Our method relies on the Genetic Algorithm which finds globally optimal structures with a predefined number of embedded layers. We investigate simple rectangular quantum wells with embedded step layers for applications in tunable mid-infrared photodetectors. The effects of band nonparabolicity are taken into account to refine our model.

Keywords

Quantum well Stark effect Intersubband absorption  Tunable photodetectors Genetic algorithm 

Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • A. Radosavljević
    • 1
    • 2
  • J. Radovanović
    • 1
  • V. Milanović
    • 1
  • D. Indjin
    • 3
  1. 1.School of Electrical EngineeringUniversity of BelgradeBelgradeSerbia
  2. 2.P* Group, Vinča Institute of Nuclear SciencesUniversity of BelgradeBelgradeSerbia
  3. 3.School of Electronic and Electrical EngineeringUniversity of LeedsLeedsUK

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