Nanoplasmonic magneto-optical isolator [Invited]  

作　　者：Vahid Foroughi Nezhad Chenglong You Georgios Veronis 

机构地区：[1]School of Electrical Engineering and Computer Science,Louisiana State University,Baton Rouge,Louisiana 70803,USA [2]Center for Computation and Technology,Louisiana State University,Baton Rouge,Louisiana 70803,USA [3]Department of Physics and Astronomy,Louisiana State University,Baton Rouge,Louisiana 70803,USA

出　　处：《Chinese Optics Letters》2021年第8期130-137,共8页中国光学快报（英文版）

摘　　要：We introduce a nanoplasmonic isolator that consists of a cylindrical resonator placed close to a metal-dielectric-metal(MDM) waveguide. The material filling the waveguide and resonator is a magneto-optical(MO) material, and the structure is under an externally applied static magnetic field. We theoretically investigate the properties of the structure and show that the cavity mode without MO activity splits into two modes when the MO activity is present. In addition, we find that the presence of the MDM waveguide leads to a second resonance due to the geometrical asymmetry caused by the existence of the waveguide. We also show that, when MO activity is present, the cavity becomes a traveling wave resonator. Thus, the transmission of the structure depends on the direction of the incident light, and the proposed structure operates as an optical isolator.

关 键 词：PLASMONICS metal optics magneto-optic systems 

分 类 号：TN256[电子电信—物理电子学]