Sharp and asymmetric transmission response in metal-dielectric-metal plasmonic waveguides containing Kerr nonlinear media

被引：78

作者：

Zhong, Zhi-Jian ^{[1
]}

Xu, Yi ^{[1
]}

Lan, Sheng ^{[1
]}

Dai, Qiao-Feng ^{[1
]}

Wu, Li-Jun ^{[1
]}

机构：

[1] S China Normal Univ, Lab Photon Informat Technol, Sch Informat & Optoelect Sci & Engn, Guangzhou 510006, Guangdong, Peoples R China

来源：

OPTICS EXPRESS | 2010年 / 18卷 / 01期

基金：

中国国家自然科学基金;

关键词：

FILTERS;

D O I：

10.1364/OE.18.000079

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Based on the excitation of surface plasmon polaritons (SPPs), we analytically and numerically investigate the transmission response in metal-dielectric-metal (MDM) plasmonic waveguides with a side coupled nanocavity (SCNC). By filling the nanocavity with a Kerr nonlinear medium, the position of the resonant dip in the transmission spectrum can be tuned by the incident light intensity. The oscillation of a Fabry-Perot nanocavity formed by incorporating a finite length of the same Kerr nonlinear media into the MDM waveguide acts as a background for the transmission response of the system and induces a sharp and asymmetric response line shape. As a result, the wavelength shift required for the plasmonic device to be switched from the maximum to the minimum transmission can be reduced by half in a structure less than 400 nm long. Such an effect may be potentially applied to constructing SPP-based all-optical switching with low power threshold at nanoscale. (C) 2009 Optical Society of America

引用

页码：79 / 86

页数：8

共 24 条

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