期刊
OPTICAL MATERIALS
卷 30, 期 9, 页码 1440-1445出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optmat.2007.08.010
关键词
CdSe/CR39 filter; nonlinear refraction index
Hybrid composites of CdSe nanocrystals embedded in allyl diglycol carbonate (CR39) matrices have been prepared and characterized. The measurements show that the linear refractive index of the composite decreases as the CdSe nanocrystal's weight-percentage concentration increases at the laser wavelengths of 632.8 nm and 532 nm. The room temperature nonlinear optical properties of the hybrid composites were investigated using a single-beam Z-scan technique with femtosecond laser pulses at the wavelengths of 794 nm and 397 nm. The experimental data reveals that the Kerr nonlinear refractive index n(2) of the composite increase at these wavelengths when the CdSe nanocrystal's weight-percentage concentration increases. Also, the nonlinear refractive index n(2) of the CdSe/CR39 hybrid composites exhibit dispersion from a positive value at 794 mn (below the band gap) to a positive value at 395 nm (above the band gap). The measured dispersion of n(2) is roughly consistent with the Sheik-Bahae's theory for the bound electronic nonlinear refraction resulting from the two-photon resonance. Published by Elsevier B.V.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据