Chinese Optics Letters, 2019, 17 (3): 032601, Published Online: Mar. 8, 2019   

Enhanced nonlinearity for filamentation in gold-nanoparticle-doped water Download: 619次

Author Affiliations
1 Shanghai Key Laboratory of Modern Optical System, Engineering Research Center of Optical Instrument and System, Ministry of Education, School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
2 State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China
Abstract
We report a universal approach based on the surface plasmon resonances (SPRs) attained in filamentation in water doped with gold nanoparticles for enhancing the nonlinear refractive index. The filament-induced supercontinuum spectrum in water overlaps with SPRs of gold nanospheres, which further leads to a modification on the Kerr nonlinear refractive index. In our experiment, the measured nonlinear refractive index (n2) in water doped with gold nanoparticles increases by six times, as compared with that in pure water. Such enhancement may be useful for filament-induced nonlinear applications with modest incident intensity.

Shuai Yuan, Lirong Wang, Fengjiang Liu, Fengquan Zhou, Min Li, Hui Xu, Yuan Nie, Junyi Nan, Heping Zeng. Enhanced nonlinearity for filamentation in gold-nanoparticle-doped water[J]. Chinese Optics Letters, 2019, 17(3): 032601.

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