Piezoelectric effect on optical properties of pseudomorphically strained wurtzite GaN quantum wells
- 1 June 1997
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Photonics Technology Letters
- Vol. 9 (6) , 728-730
- https://doi.org/10.1109/68.584971
Abstract
The presence of internal strain in wurtzite quantum-well (QW) structures may lead to the generation of large polarization fields. These piezoelectric fields cause a spatial separation of the electrons and holes inside the QW to screen the internal fields. A self-consistent calculation of optical gain and the corresponding differential gain is presented in pseudomorphically strained GaN quantum wells as a function of carrier density. Based on the local exchange-correlation potential, electron and hole band structures are obtained by coupling Poisson's equation with an effective-mass Schrodinger equation in the conduction band and an envelope-function (or k/spl middot/p) Hamiltonian in the valence band. Our calculations show that self-consistent calculations including the piezoelectric effects are essential for accurate description of strained wurtzite QW structures.Keywords
This publication has 13 references indexed in Scilit:
- Optical gain of strained wurtzite GaN quantum-well lasersIEEE Journal of Quantum Electronics, 1996
- Optical gain in wide bandgap GaN quantum well lasersSemiconductor Science and Technology, 1996
- Valence-band discontinuities of wurtzite GaN, AlN, and InN heterojunctions measured by x-ray photoemission spectroscopyApplied Physics Letters, 1996
- Elastic constants of gallium nitrideJournal of Applied Physics, 1996
- Piezoresistive effect in wurtzite n-type GaNApplied Physics Letters, 1996
- Envelope-function formalism for valence bands in wurtzite quantum wellsPhysical Review B, 1996
- The influence of the strain-induced electric field on the charge distribution in GaN-AlN-GaN structureJournal of Applied Physics, 1993
- INTRABAND RELAXATION EFFECT ON OPTICAL SPECTRAPublished by Elsevier ,1993
- Nonlinear optical response of [111] growth axis strained-layer superlatticesJournal of Vacuum Science & Technology A, 1987
- Exchange and correlation in atoms, molecules, and solids by the spin-density-functional formalismPhysical Review B, 1976