Nozhat N, Granpayeh N
Appl Opt. 2014 May 20;53(15):3328-32. doi: 10.1364/AO.53.003328.
In this paper, a two-dimensional nonlinear plasmonic directional coupler (2D-NPDC), with 90° waveguide bends, has been numerically analyzed by the finite-difference time-domain (FDTD) method, considering the nonlinear response of metal due to the ponderomotive force. It has been shown that the required switching power of the 2D-NPDC is 0.05% of that when only the dielectric is nonlinear and the nonlinearity of metal is neglected. Also, the cross-phase modulation (XPM) nonlinear effect has been investigated, which the power for switching is decreased significantly compared to the one with the self-phase modulation (SPM) effect.
在本文中，采用时域有限差分（FDTD）方法对具有90°波导弯曲的二维非线性等离子体定向耦合器（2D-NPDC）进行了数值分析，其中考虑了由有质动力引起的金属非线性响应。结果表明，2D-NPDC所需的开关功率仅为仅考虑电介质非线性而忽略金属非线性时的0.05%。此外，还研究了交叉相位调制（XPM）非线性效应，与自相位调制（SPM）效应相比，其开关功率显著降低。
