Linear and nonlinear optical absorption in copper nanocluster-glass composites
Linear and nonlinear optical absorption in copper nanocluster-glass composites
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DOI：
10.1016/j.matlet.2007.02.065
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发表时间：
2007-09
影响因子：
3
通讯作者：
B. Ghosh;P. Chakraborty;S. Mohapatra;P. Kurian;C. Vijayan;P. Deshmukh;P. Mazzoldi
中科院分区：
文献类型：
--
作者：
B. Ghosh;P. Chakraborty;S. Mohapatra;P. Kurian;C. Vijayan;P. Deshmukh;P. Mazzoldi
在100 keV和200 keV的Cu+离子轰击下，在熔融石英玻璃中形成了铜纳米团簇。紫外-可见光谱测量已经揭示了在特征表面等离子体共振（SPR）频率处的突出的线性吸收带，这表明即使没有热处理，在玻璃基质中也明显形成了铜胶体。离子诱导的胶体形成的玻璃没有热处理可能是第一次在本研究中观察。注入样品的后续退火导致吸收带的进一步增强。没有热退火的铜纳米团簇的形成可以归因于即使在环境条件下铜原子的相对高的迁移率。通过Z-扫描技术测量了金属纳米团簇-玻璃复合材料的透射率，发现了金属纳米团簇-玻璃复合材料的非线性光学响应的饱和吸收。
Copper nanoclusters have been formed in fused silica glasses under 100 keV and 200 keV Cu+ion implantations. UV–Vis spectroscopy measurements have revealed prominent linear absorption bands at characteristic surface plasmon resonance (SPR) frequency signifying the appreciable formation of copper colloids in glass matrices even without thermal treatments. Ion-induced colloid formation in glasses without thermal treatments is probably the first time observation in the present study. Subsequent annealing of the implanted samples has resulted in the further enhancement of the absorption bands. Formation of copper nanoclusters without thermal annealing can be attributed to the relatively high mobility of copper atoms even at ambient conditions. The transmittance measurements made by Z-scan technique have revealed saturable absorption signifying the nonlinear optical responses of the metal nanocluster-glass composites.