Measuring the refractive index around intersubband transition resonance in GaN/AlN multi quantum wells

Elad Gross, Amir Nevet, Asaf Pesach, Eva Monroy, Shmuel E. Schacham, Meir Orenstein, Mordechai Segev, Gad Bahir

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

We present the direct measurement of the refractive index distribution (spectral dispersion) arising from an intersubband transition in GaN/AlN multi quantum wells structure. The measurement is carried out through a novel interferometric technique. The measured interferogram yields a change in the refractive index varying from -5 × 10-3 to 6 × 10 -3 as a function of the wavelength, introduced by the intersubband resonance at 1.5 μm. These results compare well with those derived using Kramers-Kronig transform of the measured absorption spectrum.

Original languageEnglish
Pages (from-to)3800-3808
Number of pages9
JournalOptics Express
Volume21
Issue number3
DOIs
StatePublished - 11 Feb 2013

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