Optimization of electro-optical characteristics of GaAs-based oxide confinement VCSEL

M. S. Alias, S. Shaari, S. M. Mitani

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


An experimental study has been presented of the oxide-confined vertical-cavity surface-emitting lasers (VCSEL) operating in the 850 nm region of the electromagnetic spectrum. In this regard, various relevant VCSEL samples with numerous oxide aperture sizes have been fabricated and characterized. Thorough investigations of the electrical as well as optical characteristics of the fabricated samples have been performed which includes the overall device performance as a function of the oxidize aperture sizes. It is reported that the VCSEL with oxide aperture size <10 μm require low threshold currents (<1 mA). Further, the differential quantum efficiencies up to 28% were measured for a number of these devices. It is found that devices employing oxide aperture of 10 to 15 μm shows promising electro-optical characteristics for 850 nm oxide VCSEL optimization.

Original languageEnglish (US)
Pages (from-to)806-810
Number of pages5
JournalLaser Physics
Issue number4
StatePublished - Apr 2010
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Instrumentation
  • Atomic and Molecular Physics, and Optics
  • Industrial and Manufacturing Engineering


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