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

doi:10.1002/pssb.200303371

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

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

12 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 language	English
Pages (from-to)	384-387
Number of pages	4
Journal	Physica Status Solidi (B): Basic Research
Volume	240
Issue number	2
DOIs	https://doi.org/10.1002/pssb.200303371
State	Published - Nov 2003
Externally published	Yes

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

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.",

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AU - Chen, Gang

AU - Rapaport, R.

AU - Mitrofanov, O.

AU - Gmachl, C.

AU - Ng, H. M.

PY - 2003/11

Y1 - 2003/11

N2 - 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.

AB - 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.

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

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