Journal
APPLIED PHYSICS LETTERS
Volume 83, Issue 6, Pages 1077-1079Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1599044
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We report the experimental demonstration of second-harmonic generation in periodically poled GaN by first-order quasiphase matching. The periodically poled structure was grown by plasma-assisted molecular-beam epitaxy. We observed about 9 muW of second-harmonic power from a fundamental input laser wavelength of 1658.6 nm with a normalized conversion efficiency of 12.76% W-1 cm(-2). The ability to perform nonlinear wavelength conversion by periodic poling and the fact that GaN has a very wide window of transparency, pave the way for GaN to be used for nonlinear optical devices in telecommunications as well as a nonlinear light source for biochemical detection in the far infrared and deep ultraviolet. (C) 2003 American Institute of Physics.
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