Magnetic spin–orbit interaction of light

查看全文 作　　者：Mengjia [1]Wang;Hongyi [1]Zhang;Tatiana [1]Kovalevich;Roland [1]Salut;Myun-Sik [2]Kim;Miguel Angel [1]Suarez;Maria-Pilar [1]Bernal;Hans-Peter [2]Herzig;Huihui [3]Lu;Thierry [1]Grosjean

机构地区：[1]FEMTO-ST Institute,UniversitéBourgogne Franche-Comté,UMR CNRS 617415B Av.des Montboucons,25030 Besancon Cedex,France;[2]Optics and Photonics Technology Laboratory,Ecole Polytechnique Fédérale de Lausanne(EPFL),Rue de la Maladière 71b,Neuchâtel CH-2000,Switzerland;[3]Department of Optoelectronic Engineering,Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications,Jinan University,Guangzhou 510632,China

出　　处：《Light(Science & Applications)》索引2018年第7卷第1期,共8页

基　　金：by the Collegium SMYLE,the Labex ACTION(contract ANR-11-LABX-01-01);the Région Bourgogne Franche-Comté;supported by the French RENATECH network and its FEMTO-ST technological facility. 摘　　要：We study the directional excitation of optical surface waves controlled by the magnetic field of light.We theoretically predict that a spinning magnetic dipole develops a tunable unidirectional coupling of light to transverse electric(TE)polarized Bloch surface waves(BSWs).Experimentally,we show that the helicity of light projected onto a subwavelength groove milled into the top layer of a 1D photonic crystal(PC)controls the power distribution between two TE-polarized BSWs excited on both sides of the groove.Such a phenomenon is shown to be solely mediated by the helicity of the magnetic optical field,thus revealing a magnetic spin-orbit interaction of light.Remarkably,this magnetic optical effect is clearly observed via a near-field coupler governed by an electric dipole moment:it is of the same order of magnitude as the electric optical effects involved in the coupling.This opens up new degrees of freedom for the manipulation of light and offers desirable and novel opportunities for the development of integrated optical functionalities. 关键词：LIGHT INTERACTION DIPOLE

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Magnetic spin–orbit interaction of light

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