Temperature dependent gain characteristics in GaN-based vertical-cavity surface-emitting lasers

Tien-chang Lu*, Bo Siao Cheng, Mei Chung Liu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Temperature dependent gain characteristics and linewidth enhancement factor (D-factor) of vertical-cavity surface-emitting lasers with InGaN/GaN multiple quantum wells were studied by measuring the photoluminescence spectra below the threshold condition and analyzed by using the Hakki-Paoli method. The optical gain and differential gain showed a more rapid increase as a function of the injected carriers as temperature decreased. The D-factor for the lasing mode was estimated as 2.8 at room temperature and decreased to a value as low as 0.6 at 80 K.

Original languageEnglish
Pages (from-to)20149-20154
Number of pages6
JournalOptics Express
Volume17
Issue number22
DOIs
StatePublished - 26 Oct 2009

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