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

Chen Gang | Zendy; Rapaport R. | Zendy; Mitrofanov O. | Zendy; Gmachl C. | Zendy; Ng H. M. | Zendy

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

Author(s) -

Chen Gang,

Rapaport R.,

Mitrofanov O.,

Gmachl C.,

Ng H. M.

Publication year - 2003

Publication title -

physica status solidi (b)

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.51

H-Index - 109

eISSN - 1521-3951

pISSN - 0370-1972

DOI - 10.1002/pssb.200303371

Subject(s) - dephasing , quantum well , excited state , absorption (acoustics) , electron , excitation , optoelectronics , condensed matter physics , materials science , physics , atomic physics , optics , laser , quantum mechanics

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. (© 2003 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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