Chiral nanosurfaces for enhancement of local electromagnetic field

Lukas Ohnoutek; Ventsislav K. Valev

doi:10.1117/12.2589695

18 April 2021 Chiral nanosurfaces for enhancement of local electromagnetic field

Lukas Ohnoutek, Ventsislav K. Valev

Proceedings Volume 11770, Nonlinear Optics and Applications XII; 1177005 (2021) https://doi.org/10.1117/12.2589695
Event: SPIE Optics + Optoelectronics, 2021, Online Only

Abstract

The ability of plasmonic nanosurfaces to produce strong electromagnetic fields in their vicinity upon illumination can be used to enhance effects, such as those originating from chirality (lack of mirror symmetry) of molecules. We numerically investigate chiral nanosurfaces composed of plasmonic nanobars with varying packing densities. We identify the optimum illumination conditions for maximal field enhancement. Under these illumination conditions, the optical chirality near the surface exceeds the optical chirality of the incident light by almost an order of magnitude in a large area (200 nm × 200 nm) near the surface. Our simulations prove the nanosurfaces to be promising candidates for enhancement of chiral-optical effects.

Conference Presentation

Citation Download Citation

Lukas Ohnoutek and Ventsislav K. Valev "Chiral nanosurfaces for enhancement of local electromagnetic field", Proc. SPIE 11770, Nonlinear Optics and Applications XII, 1177005 (18 April 2021); https://doi.org/10.1117/12.2589695

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