Dynamic Controls of Second-Harmonic Generations in Both Forward and Backward Modes Using Reconfigurable Plasmonic Metawaveguide
Dynamic Controls of Second-Harmonic Generations in Both Forward and Backward Modes Using Reconfigurable Plasmonic Metawaveguide
复制标题
使用可重构等离子体超波导对正向和反向模式中的二次谐波产生进行动态控制
DOI：
10.1002/adom.201902058
复制
发表时间：
2020-02-24
影响因子：
9
通讯作者：
Cui, Tie Jun
中科院分区：
文献类型：
--
作者：
Gao, Xinxin;Zhang, Jingjing;Cui, Tie Jun
Second-harmonic generation (SHG) has recently been explored in plasmonic metamaterials, but real-time tunability of the nonlinear process still remains a challenge and has not been reported. Here, an ultrathin spoof surface plasmon polariton (SSPP) waveguide loaded with varactor diodes is proposed to achieve high conversion efficiencies of SHGs in both forward and backward phase-matching conditions in the same frequency band. The dispersion behaviors of SSPPs can be manipulated by adjusting the capacitance of the varactor diodes loaded on the unit structure, allowing forward and backward phase-matching for both fundamental and second-harmonic waves. Experiments are demonstrated in the microwave frequency to observe the dynamic controls of the forward/backward SHGs in a single SSPP platform, showing good agreement with theoretical predictions. It is expected that the reconfigurable SHGs may find many applications in nonlinear plasmonic metamaterials, wireless communication systems, and microwave integrated circuits.
