An all-dielectric metasurface with asymmetric wavefronts for oppositely propagating circularly polarized light

Fei Zhang; Ming Zhang; Honglin Yu

doi:10.1117/12.2505723

24 January 2019 An all-dielectric metasurface with asymmetric wavefronts for oppositely propagating circularly polarized light

Fei Zhang, Ming Zhang, Honglin Yu

Author Affiliations +

Proceedings Volume 10840, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Micro- and Nano-Optics, Catenary Optics, and Subwavelength Electromagnetics; 1084005 (2019) https://doi.org/10.1117/12.2505723
Event: Ninth International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT2018), 2018, Chengdu, China

Abstract

Chirality is a key molecular structural concept and a ubiquitous phenomenon in nature that has become an increasingly significant research avenue. Here, we show that an all-dielectric metasurface, an array of spatially varying anisotropic nanofins, exhibits asymmetric wavefronts for forwardly and backwardly propagating circularly polarized lights. Similar to the asymmetric transmission phenomena, two wavefronts generated by one circular polarization from both sides of the proposed metasurface are not limited to the same or mirror symmetric, but also can be arbitrarily and independently manipulated. The observation of this novel effect originates from asymmetric photonic spin-orbit interactions. As an example, a metasurface is designed to produce an optical vortex and holographic image, respectively, when a circular polarization propagates through it in opposite directions. Due to its high efficiency and multifunctionality of the proposed metasurface, this work may have potential applications in many fields, such as optical communications, and provide new ideas for studying chiral and functional materials.

Citation Download Citation

Fei Zhang, Ming Zhang, and Honglin Yu "An all-dielectric metasurface with asymmetric wavefronts for oppositely propagating circularly polarized light", Proc. SPIE 10840, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Micro- and Nano-Optics, Catenary Optics, and Subwavelength Electromagnetics, 1084005 (24 January 2019); https://doi.org/10.1117/12.2505723

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