基于微纳波导四波混频效应的全光逻辑实现  

Optical Logic Gate Based on Four-Wave Mixing in Subwavelength Metallic Waveguide

作　　者：王鲁俊[1] 闫连山[1] 郭迎辉[1] 温坤华[1] 陈智宇[1] 潘炜[1] 罗斌[1] 

机构地区：[1]西南交通大学信息光子与通信研究中心,四川成都610031

出　　处：《光学学报》2013年第4期174-179,共6页Acta Optica Sinica

基　　金：国家973计划(2011CB301800);国家自然科学基金(61275068)资助课题

摘　　要：研究填充非线性材料的金属介质金属(MIM)平面波导中的四波混频(FWM)效应,针对该类基于表面等离子体(SP)局域增强和双折射特性的微纳器件,具体分析了不同偏振态抽运光输入所对应的FWM过程。在厚度为250nm的波导中,当入射抽运偏振态相同时FWM效应最强,FWM效率达到-33dB;在入射抽运偏振态正交时FWM效应最弱,没有闲频波产生。在厚度为50nm的波导中由于SP TE模式截止,仅在入射抽运偏振态均为TM时FWM效率达到-30dB,其他偏振态下没有闲频波产生。利用上述特性可以制作基于FWM的微纳全光逻辑器件。Four-wave mixing （FWM） effect in metal-insulator-metal （MIM） waveguide filled with a Kerr nonlinear medium is investigated, followed by the study about polarization-dependent FWM in such nanoplasmonic structures due to the local enhancement effect of surface plasmons （SP） and birefringent characteristics. When the pumps with the polarization parallel to each other are launched into the waveguide with 250-nm thickness, the FWM efficiency reaches --33 dB. However, when the pumps are perpendicularly polarized, idler waves can not be obtained. For the waveguide with 50-nm thickness, when the pumps are both TM polarized, the FWM efficiency reaches -30 dB. While under other polarization states of pumps, idler waves can not be observed due to the cut off of TE modes. Such FWM-based mechanisms are utilized to construct all-optical logical gates.

关 键 词：非线性光学 表面等离子体 微纳波导 四波混频 双折射效应 

分 类 号：O437[机械工程—光学工程]