Wu Tingting, Shum Perry Ping, Sun Yunxu, Shao Xuguang, Huang Tianye
Opt Express. 2015 Jan 12;23(1):253-63. doi: 10.1364/OE.23.000253.
We provide a comprehensive study on the efficient third harmonic generation (THG) in a lossy metal-hybrid-metal asymmetric plasmonic slot waveguide (MHM) to develop a method for efficient THG by focusing on the modal phase-matching condition (PMC), the third-order nonlinear susceptibility of the nonlinear interactive material, and the pump-harmonic modal overlap in conjunction with reasonable linear propagation loss. In addition to the PMC and the nonlinear material, the stimulated THG process can be greatly enhanced by the large pump-harmonic modal overlap. With 1 W pump power, simulation results present that THG conversion efficiency up to 2.79 × 10(-4) within 4.5 ����m MHM can be achieved.
我们对有损金属 - 混合金属非对称等离子体狭缝波导（MHM）中的高效三次谐波产生（THG）进行了全面研究，通过关注模态相位匹配条件（PMC）、非线性相互作用材料的三阶非线性极化率以及泵浦 - 谐波模态重叠，并结合合理的线性传播损耗，来开发一种实现高效THG的方法。除了PMC和非线性材料外，大的泵浦 - 谐波模态重叠可极大地增强受激THG过程。在泵浦功率为1 W时，模拟结果表明，在4.5μm的MHM内可实现高达2.79×10^(-4)的THG转换效率。
