Journal
OPTICS LETTERS
Volume 41, Issue 7, Pages 1368-1371Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.41.001368
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Funding
- National Natural Science Fund of China [51272050, 51302047, 61205113]
- Natural Science Fund of Heilongjiang Province [A2015015]
- China Scholarship Council (CSC)
- Ministry Education of China [B13015]
- Ministry of Education (MOE) [R-144-000-327-112]
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An ultrathin hexagonal boron nitride film is synthesized by a method of chemical vapor deposition. Irradiated by femtosecond laser pulses in the visible spectrum of 400800 nm, it exhibits multiphoton absorption and positive nonlinear refraction properties. The two-photon and three-photon absorption coefficients are of the order of 10(-5) cm W-1 and 10(-14) cm(3) W-2, respectively. The nonlinear refraction coefficient is as large as similar to 10(-8) cm(2) W-1. These nonlinear coefficients lead to figures of merit that meet the material requirements for all-optical switching devices. (C) 2016 Optical Society of America
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