Optical gain optimization of Al0.8Ga0.2N-Delta-GaN quantum well laser in ultraviolet spectra using genetic algorithm Conference

Polash, MMH, Alam, MS. (2015). Optical gain optimization of Al0.8Ga0.2N-Delta-GaN quantum well laser in ultraviolet spectra using genetic algorithm . 69(12), 81-90. 10.1149/06912.0081ecst

cited authors

  • Polash, MMH; Alam, MS

abstract

  • An AlGaN based quantum well laser with GaN delta layer and AlN barrier layers has been designed and characterized for obtaining electronic and optical characteristics. The band structure was calculated with self-consistent 6-band k.p formalism including valence-band mixing effect, strain and polarization effect. A Genetic Algorithm based optimization has been performed to optimize the optical gain taking well width, delta width and barrier width into consideration. The Optimization of both TE and TM polarized optical gain exhibits good improvement than previously published work. The peak optical gain as obtained in analysis is 3589.5 cm-1 while the peak spontaneous emission rate is 12.94×1028 s-1cm-3eV-1 at 246.89nm for 5×1019cm-3 carrier density. The optimum TE optical gain is found to be 6479.1 cm-1 for 11Å QW with 7Å delta layer at 279nm wavelength and optimum TM gain is found to be 116.95 cm-1 for 20Å QW with 3Å delta layer at 289.8nm wavelength.

publication date

  • January 1, 2015

Digital Object Identifier (DOI)

International Standard Book Number (ISBN) 13

start page

  • 81

end page

  • 90

volume

  • 69

issue

  • 12