Low threshold current density, highly strained InGaAs laser grown by MOCVD

I. Liang Chen, Wei Chou Hsu, Tsin Dong Lee, Chih Hung Chiou

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


It is possible to delay the growth mode transition from a 2-D growth mode to 3-D growth mode (the so-called Stranski-Krastanov growth mode) by means of non-equilibrium growth process employing a low growth temperature and a high growth rate, and adopting a high V/III ratio simultaneously to maintain crystal quality. Record emission wavelengths in multiple InGaAs/GaAs quantum wells without a strain-compensated barrier are grown by metal organic chemical vapor deposition (MOCVD). An InGaAs vertical-cavity surface emitting laser (VCSEL) with emission spectrum up to 1.26 μm under CW operation has been realized. Optimizing the quality of InGaAs QWs leads to a low threshold current density. The qualities of the highly strained InGaAs QWs of this VCSEL structure, such as internal quantum efficiency, internal loss, and transparency current density, were investigated by standard broad area (BA) laser process. Combined with an extensive gain-cavity detuning and the high-quality InGaAs QWs, the InGaAs VCSEL, we believe, is a promising candidate for application to long wavelength, low-cost source fiber-optical communication systems.

Original languageEnglish
Pages (from-to)4522-4525
Number of pages4
JournalThin Solid Films
Issue number10
Publication statusPublished - 2007 Mar 26

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry


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