Electro-optic effect and optical rectification in gold nanoparticles immobilized above a gold surface
Electro-optic effect and optical rectification in gold nanoparticles immobilized above a gold surface
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固定在金表面上的金纳米粒子的电光效应和光学整流
DOI：
10.1088/0022-3727/43/49/495101
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
M. Shimojo and K. Kajikawa
中科院分区：
文献类型：
--
作者：
Y. Uchiho;M. Shimojo and K. Kajikawa
在金表面上的表面固定金纳米球（SIGNs）中观察到了二阶非线性光学效应，即线性电光效应和光学整流效应. EO和OR测量在表面等离子体共振条件下在衰减全反射几何结构中进行。虽然已经报道了SIGN结构显示出相当大的二次谐波产生活性，但是还没有关于SIGN结构中的线性EO效应和OR的报道。单个SIGN结构的有效二阶极化率估计为13 pm V− 1（EO）和40 pm V− 1（OR）。尽管理论预测EO和OR的磁化率相等，但观察到的磁化率不同。这种差异的原因进行了讨论。
Second-order nonlinear optical effects, a linear electro-optic (EO) effect and optical rectification (OR), were observed in surface immobilized gold nanospheres (SIGNs) above a gold surface with a gap of about 1.4 nm. The EO and OR measurements were performed in an attenuated total reflection geometry under a surface plasmon resonance condition. While it has been reported that the SIGN structure shows considerable second-harmonic generation activity, there has been no report on a linear EO effect and OR in the SIGN structure. The effective second-order susceptibilities of a single SIGN structure were evaluated to be 13 pm V− 1 (EO) and 40 pm V− 1 (OR). Although the theory predicts that the susceptibilities of EO and OR will be equal, the observed susceptibilities were different. The reasons for this discrepancy are discussed.