Nonlinear optical properties of Au/PVP composite thin films

doi:10.1088/1009-1963/14/9/042

Abstract

Abstract Colloidal Au and poly(vinylpyrrolidone) (PVP) composite thin films are fabricated by spin-coating method. Linear optical absorption measurements of the Au/PVP composite films indicate an absorption peak around 530 nm due to the surface plasmon resonance of gold nanoparticles. Nonlinear optical properties are studied using standard Z-scan technique, and experimental results show large optical nonlinearities of the Au/PVP composite films. A large value of $\chi^{(3)}/\alpha$ up to 0.56×10^-10esu$\cdot$cm is obtained, which is comparable to the best values reported in metal/oxide composite films.

Keywords: Au/PVP third-order optical nonlinearities third-order susceptibility

Received: 20 April 2005
Revised: 18 May 2005
Accepted manuscript online:

PACS:	78.66.Sq	(Composite materials)
	73.22.Lp	(Collective excitations)
	78.20.Ci	(Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))
	42.65.An	(Optical susceptibility, hyperpolarizability)

Fund: Project supported by the Sino-France Program for Advanced Research (Grant No PRA MX03-07).

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Shen Hong (沈鸿), Cheng Bo-Lin (程波林), Lü Guo-Wei (吕国伟), Wang Wei-Tian (王伟田), Guan Dong-Yi (关东仪), Chen Zheng-Hao (陈正豪), Yang Guo-Zhen (杨国桢) Nonlinear optical properties of Au/PVP composite thin films 2005 Chinese Physics 14 1915

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Nonlinear optical properties of Au/PVP composite thin films

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