Rahmati Azadeh Taher, Granpayeh Nosrat
Faculty of Electrical and Computer Engineering, K. N. Toosi University of Technology, Tehran, Iran.
Appl Opt. 2010 Dec 20;49(36):6952-9. doi: 10.1364/AO.49.006952.
In this paper, the cross-phase modulation Kerr nonlinear effect is utilized to induce nonlinearity and a change in the coupling length by a high-intensity pump signal in the nonlinear photonic crystal directional coupler. We have analyzed and modified the nonlinear square-lattice directional couplers for the first time, to the best of our knowledge, and have improved the power consumption for inducing the nonlinear switching. We have shown that according to the slower group velocity and the increased confinement of the TM modes with lower frequency in the region with a higher dielectric constant in a square lattice, the required switching pump power of the structure is less than that of the same triangular structure.
在本文中，利用交叉相位调制克尔非线性效应，通过非线性光子晶体定向耦合器中的高强度泵浦信号来诱导非线性以及耦合长度的变化。据我们所知，我们首次对非线性方形晶格定向耦合器进行了分析和改进，并降低了诱导非线性开关所需的功耗。我们已经表明，根据较慢的群速度以及在方形晶格中较高介电常数区域内较低频率的TM模式的限制增强，该结构所需的开关泵浦功率小于相同三角形结构的泵浦功率。
