An All-Optical Diode Based on Plasmonic Attenuation and Nonlinear Frequency Conversion

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2013,（9）
• 页码范围: 136-140
• 页数: 5页
• 语种: 英文
• DOI: 10.1088/0256-307X/30/9/097301

摘要

We present the design of an all-optical diode in a metal-dielectric structure where plasmonic attenuation and quasi-phase-matching are harnessed to greatly improve its performance.Due to the asymmetric design of the second-order nonlinear coefficient,different incident directions will ignite different plasmonic nonlinear processes,which compensate or accelerate plasmonic attenuation.As a result,a unidirectional output of plasmonic signal is achieved.This designed all-optical diode shows advantages of low power consumption,short sample length,high isolation contrast,wide acceptance of structural and initial conditions,and tunable unidirectionality,and becomes of practical interest.