Optimal Design of GaN-AlGaN Bragg-Confined Structures for Intersubband Absorption in the Near-Infrared Spectral Range

Jelena Radovanović, Vitomir Milanović, Zoran Ikonić, Dragan Indjin, Vladimir Jovanović, Paul Harrison

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

A method is proposed for the design and optimization of structural parameters of GaN-AlGaN Bragg-confined structures with respect to peak intersubband absorption from the ground to the first excited state, 1 → 2 electronic transition, in the near infrared spectral range. An above-the-barrier bound state was used to extend the range of transition energies above the values available in conventional quantum wells. Intrinsic polarization fields and nonparabolicity effects were taken into account. The selection of optimal parameters, maximizing the absorption at wavelengths of 1.55 and 1.3 μm, was performed by using a simulated annealing algorithm, and optimal structures with infinite superlattices as confinement regions were thus designed. These optimal parameters were then used to set realistic, finite structures with a small number of layers, the performance of which was re-evaluated by solving the Schrödinger-Poisson equation self-consistently for a few different levels and profiles of doping.

Original languageEnglish
Article number1233734
Pages (from-to)1297-1304
Number of pages8
JournalIEEE Journal of Quantum Electronics
Volume39
Issue number10
Early online date29 Sep 2003
DOIs
Publication statusPublished - 1 Oct 2003
Externally publishedYes

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