Optics Express 2013-02-11

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

文献索引：Opt. Express 21(3) , 3800-8, (2013)

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摘要

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.

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