Optical sorting of sub-10 nm chiral entities using non-chiral metasurface

Libang Mao; Meng Lian; Jingyuan Jia; Ying Su; Haonan Ren; Kuan Liu; Tun Cao

doi:10.1117/12.2604488

13 December 2021 Optical sorting of sub-10 nm chiral entities using non-chiral metasurface

Libang Mao, Meng Lian, Jingyuan Jia, Ying Su, Haonan Ren, Kuan Liu, Tun Cao

Proceedings Volume 12072, 10th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Micro- and Nano-Optics, Catenary Optics, and Subwavelength Electromagnetics; 1207207 (2021) https://doi.org/10.1117/12.2604488
Event: Tenth International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT 2021), 2021, Chengdu, China

Abstract

Enantioseparation is a fundamental problem in pharmaceutics and agrochemicals. Yet, the prevailing chemical techniques are not effective. In this paper, we proposed an achiral metasurface, which consists of a disk-double split ring (DDSR) resonator sustaining dipole-octupole (DO) Fano resonance (FR). We have proved that such a resonance can significantly enlarge the chiral gradient force of the enantiomers by numerical simulation. We find that the resonator has a large chirality density gradient near the DO-FR, which strengthens the chiral gradient force that can discriminate the sub-10 nm chiral nanoparticles. Therefore, the enantioselective optical potential can trap or push different enantiomers. We propose a method to enhance the chiral gradient force by using an achiral metasurface consisting of a disk and an asymmetric double split-ring resonator, which can promote the development of enantiomer purification and separation technology, and bring new prospects for the latest all-optical enantiomer synthesis technology.

Citation Download Citation

Libang Mao, Meng Lian, Jingyuan Jia, Ying Su, Haonan Ren, Kuan Liu, and Tun Cao "Optical sorting of sub-10 nm chiral entities using non-chiral metasurface", Proc. SPIE 12072, 10th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Micro- and Nano-Optics, Catenary Optics, and Subwavelength Electromagnetics, 1207207 (13 December 2021); https://doi.org/10.1117/12.2604488

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