Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/100792
Title: Analysis of optical gain and threshold current density of wurtzite InGaN/GaN/AlGaN quantum well lasers
Authors: Teo, Y. C.
Chong, T. C.
Li, M. F.
Fan, Weijun
Keywords: DRNTU::Science::Physics::Atomic physics::Quantum theory
Issue Date: 1998
Source: Yeo, Y. C., Chong, T. C., Li, M. F., & Fan, W. (1998). Analysis of optical gain and threshold current density of wurtzite InGaN/GaN/AlGaN quantum well lasers. Journal of Applied Physics, 84(4), 1813.
Series/Report no.: Journal of applied physics
Abstract: The valence subband structures, density-of-states, and optical gain of (0001) wurtzite InxGa12xN/GaN quantum wells (QWs) are studied using a numerical approach. We used the effective-mass parameters of GaN and InN derived using the empirical pseudopotential method. By varying the well width and mole fraction of In in the well material, the effects of quantum confinement and compressive strain are examined. A narrower well width and a higher In mole fraction in the well lead to transverse electric enhancement and transverse magnetic suppression of the optical gain. From the relationship between the optical gain and the radiative current density, we obtain the transparent current density for a single QW to be 200 A/cm2. The InGaN/GaN/AlGaN separate confinement heterostructure multiple QW (MQW) laser structure is then analyzed. It is shown that a suitable combination of well width and number of QWs should be selected in optimizing the threshold current density in such MQW lasers.
URI: https://hdl.handle.net/10356/100792
http://hdl.handle.net/10220/17978
ISSN: 1089-7550
DOI: 10.1063/1.368338
Rights: © 1998 American Institute of Physics. This paper was published in Journal of Applied Physics and is made available as an electronic reprint (preprint) with permission of American Institute of Physics. The paper can be found at the following official DOI: [http://dx.doi.org/10.1063/1.368338]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles

Files in This Item:
File Description SizeFormat 
Analysis of optical gain and threshold current density of wurtzite.pdf
245.47 kBAdobe PDFThumbnail
View/Open

Google ScholarTM

Check

Altmetric


Plumx

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.