期刊
OPTICS LETTERS
卷 40, 期 20, 页码 4671-4674出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.40.004671
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资金
- Alfred P. Sloan Foundation (A.P. Sloan Foundation) [FG-BR2014-027]
- Army Research Office (ARO) [W911NF-13-1-0293]
- Caltech University of Cambridge SURF exchange
- Gordon and Betty Moore Foundation [GBMF1250]
- National Science Foundation (NSF) [PHY-1125565]
- U.S. Department of Energy (DOE) [DE-SC0010533]
We present a method of performing high-speed rotational anisotropy nonlinear optical harmonic generation experiments at rotational frequencies of several hertz by projecting the harmonic light reflected at different angles from a sample onto a stationary position-sensitive detector. The high rotational speed of the technique, 103 to 104 times larger than existing methods, permits precise measurements of the crystallographic and electronic symmetries of samples by averaging over low frequency laser-power, beam-pointing, and pulse-width fluctuations. We demonstrate the sensitivity of our technique by resolving the bulk fourfold rotational symmetry of GaAs about its [001] axis using second-harmonic generation. (C) 2015 Optical Society of America
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