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Article
Effects of transverse mode coupling and optical confinement factor on gallium-nitride based laser diode
Chinese Physics B
  • Xiaomin Jin, California Polytechnic State University - San Luis Obispo
  • Zhang Bei, Peking University
  • Dai Tao, Peking University
  • Zhang Guo-Yi, Peking University
Publication Date
4-1-2008
Abstract
We have investigated the transverse mode pattern and the optical field confinement factor of gallium nitride(GaN) laser diodes (LDs) theoretically. For the particular LD structure, composed of approximate 4 μm thick n-GaN substrate layer, the maximum optical confinement factor was found to be corresponding to the 5th order transverse mode, the so-called lasing mode. Moreover, the value of the maximum confinement factor varies periodically when increasing the n-sideGaN layer thickness, which simultaneously changes and increases the oscillation mode order of the GaN LD caused by the effects of mode coupling. The effects of the thickness and the average composition of Al in the AlGaN/GaN superlattice on the optical confinement factor are also presented. Finally, the mode coupling and optimization of the layers in the GaN-based LD are discussed.
Publisher statement
This is an author-created, un-copyedited version of an article accepted for publication in Chinese Physics B. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it.
Citation Information
Xiaomin Jin, Zhang Bei, Dai Tao and Zhang Guo-Yi. "Effects of transverse mode coupling and optical confinement factor on gallium-nitride based laser diode" Chinese Physics B Vol. 17 Iss. 4 (2008) p. 1274 - 1279
Available at: http://works.bepress.com/xjin/17/