Measurement of optical nonlinearities from intersubband transitions in GaN/AlGaN quantum wells at 1.5 μm

Gang Chen, R. Rapaport, O. Mitrofanov, C. Gmachl, H. M. Ng

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

We measured the resonant nonlinear optical absorption and refraction due to intersubband transitions in GaN/AlGaN multiple quantum well structures at 1. 5 μm. The measured values are much smaller than that predicted by theoretical studies. This is attributed to a larger than expected dephasing of excited electrons. At high excitation intensity, the absorption can be saturated.

Original languageEnglish (US)
Pages (from-to)384-387
Number of pages4
JournalPhysica Status Solidi (B) Basic Research
Volume240
Issue number2
DOIs
StatePublished - Nov 1 2003
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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