Optical Properties of Cu Nanocrystalline-OPAA Composite Film

doi:10.3724/SP.J.1077.2011.00907

Abstract

Abstract: Optically transparent Cu nanocrystalline/OPAA composite film was successfully prepared by electrodepositing Cu into ordered porous anodic alumina (OPAA) template using constant voltage direct current technique. The morphology, structure, linear optical absorption, third-order optical nonlinearity and ultrafast dynamics of the Cu/OPAA composite were characterized by field emission scanning electron microscope (FESEM), transmission electron microscope (TEM). UV-Vis spectrophotometer, Z-scan technique and femtosecond pump-probe experiment. The results show that Cu nanoparicles have diameters of 40–50nm with face center cubic structure and disperse in the branched pores of the OPAA template, which induce a surface plasmon resonance (SPR) absorption at 584 nm. When the probe optical wavelength is far away from the SPR wavelength, Cu nanocrystalline/OPAA composite film possesses a character of light-induced absorption. When the probe optical wavelength is near the SPR wavelength, it possesses a photo-bleaching character. The composite film has a non-resonant third-order nonlinear susceptibility of 0.73×10^-9 esu and a response time of 1.3 ps.

Key words: ordered porous anodic alumina, Cu nanocrystalline, third-order optical nonlinearity

CLC Number:

TB333

LIU Yan, YANG Xiu-Chun, ZHOU Hui, HOU Jun-Wei, HAN Shan-Shan, QIAN Shi-Xiong. Optical Properties of Cu Nanocrystalline-OPAA Composite Film[J]. Journal of Inorganic Materials, 2011, 26(9): 907-911.

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