Measurement of the complex nonlinear optical response of a surface plasmon-polariton
Measurement of the complex nonlinear optical response of a surface plasmon-polariton
复制标题
DOI：
10.1364/ol.39.002274
复制
发表时间：
2014-04-15
期刊：
影响因子：
3.6
通讯作者：
Boyd, Robert W.
中科院分区：
文献类型：
--
作者：
De Leon, Israel;Shi, Zhimin;Boyd, Robert W.
实验观察到表面等离子体激元（SPP）在空气包围的金膜中沿着传播的自相位调制。通过分析反射率曲线与入射角的功率关系，我们表征了SPP的复值非线性传输系数。此外，我们提出了一个程序，可以进一步提取的三阶非线性极化率的复杂值的金从我们的实验数据。我们的工作提供了直接的见解，利用金属的非线性的SPP的非线性控制，并作为一个实用的方法来测量金属材料的复值三阶非线性极化率。(C)2014年美国光学学会
We observe experimentally the self-phase modulation of a surface plasmon-polariton (SPP) propagating along a gold film bounded by air in a Kretschmann-Raether configuration. Through analyzing the power dependence of the reflectance curve as a function of the incidence angle, we characterize the complex-valued nonlinear propagation coefficient of the SPP. Moreover, we present a procedure that can further extract the complex value of the third-order nonlinear susceptibility of gold from our experimental data. Our work provides direct insights into nonlinear control of SPPs utilizing the nonlinearity of metals, and serves as a practical method to measure the complex-valued third-order nonlinear susceptibility of metallic materials. (C) 2014 Optical Society of America