Tunable and switchable polarization rotation with non-reciprocal plasmonic thin films at designated wavelengths

作     者：Dominik Floess Jessie Y Chin Akihito Kawatani Daniel Dregely Hanns-Ulrich Habermeier Thomas Weiss Harald Giessen 

作者机构：th Physics Institute and Research Center SCOPEUniversity of Stuttgart70550 StuttgartGermany Max Planck Institute for Solid State Research70569 StuttgartGermany 

出 版 物：《Light(Science & Applications)》 (光（科学与应用)（英文版）)

年 卷 期：2015年第4卷第1期

页      面：374-380页

核心收录：

学科分类：0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0803[工学-光学工程] 0702[理学-物理学] 

基　　金：We gratefully acknowledge the funding by DFG(SPP1391,FOR730,and GI 269/11-1),BMBF(FARADAY,FKZ 13N12443) MWK,Baden-Wurttemberg Stiftung and ERC(ComplexPlas) JYC and DD also acknowledge support from Carl-Zeiss-Stiftung. 

主　　题：active tuning Faraday rotation magneto-optics non-reciprocity optical rotator 

摘      要：We experimentally demonstrate an ultra-thin plasmonic optical rotator in the visible regime that induces a polarization rotation that is continuously tunable and switchable by an external magnetic field.The rotator is a magneto-plasmonic hybrid structure consisting of a magneto-optical EuSe slab and a one-dimensional plasmonic gold grating.At low temperatures,EuSe possesses a large Verdet constant and exhibits Faraday rotation,which does not saturate over a regime of several Tesla.By combining these properties with plasmonic Faraday rotation enhancement,a large tuning range of the polarization rotation of up to 8.4° for a film thickness of 220 nm is achieved.Furthermore,through experiments and simulations,we demonstrate that the unique dispersion properties of the structure enable us to tailor the wavelengths of the tunable polarization rotation to arbitrary spectral positions within the transparency window of the magneto-optical slab.The demonstrated concept might lead to important,highly integrated,non-reciprocal,photonic devices for light modulation,optical isolation,and magnetic field optical sensing.The simple fabrication of EuSe nanostructures by physical vapor deposition opens the way for many potentially interesting magneto-plasmonic systems and three-dimensional magneto-optical metamaterials.