Optical bistability in metal-insulator-metal plasmonic Bragg waveguides with Kerr nonlinear defects.
Optical bistability in metal-insulator-metal plasmonic Bragg waveguides with Kerr nonlinear defects.
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DOI：
10.1364/ao.50.001307
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发表时间：
2011-04
期刊：
影响因子：
1.9
通讯作者：
Hua Lu;Xueming Liu;Y. Gong;D. Mao;Leiran Wang
中科院分区：
文献类型：
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作者：
Hua Lu;Xueming Liu;Y. Gong;D. Mao;Leiran Wang
本文数值研究了具有克尔非线性缺陷的金属-绝缘体-金属（MIM）等离子体布拉格光栅波导的缺陷模式特征和光双稳性的非线性效应。通过时域有限差分模拟发现，随着缺陷层宽度的增大，缺陷模峰出现蓝移和高程上升，随着缺陷层介电常数的增大，缺陷模峰出现红移和高程下降。在长度小于2 μm的波导中获得了明显的光学双稳定性。结果表明，该结构可用于高集成光电路的全光开关设计。
We numerically investigate the characteristics of the defect mode and the nonlinear effect of optical bistability in metal-insulator-metal (MIM) plasmonic Bragg grating waveguides with Kerr nonlinear defects. By means of finite-difference time-domain simulations, we find that the defect mode peak exhibits a blueshift and height-rise by enlarging the width of the defect layer, and it has a redshift and height-fall with the increase of the dielectric constant of defect layer. Obvious optical bistability is obtained in our waveguides with a length of less than 2 μm. The results show that our structure could be applied to the design of all-optical switching in highly integrated optical circuits.