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Strong plasmonic confinement and optical force in phosphorene pairs

Lu, Hua, Gong, Yongkang, Mao, Dong, Gan, Xuetao and Zhao, Jianlin 2017. Strong plasmonic confinement and optical force in phosphorene pairs. Optics Express 25 (5) , pp. 5255-5263. 10.1364/OE.25.005255

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Abstract

The plasmonic responses in the spatially separated phosphorene (single-layer black phosphorus) pairs are investigated, mainly containing the field enhancement, light confinement, and optical force. It is found that the strong anisotropic dispersion of black phosphorus gives rise to the direction-dependent symmetric and anti-symmetric plasmonic modes. Our results demonstrate that the symmetrical modes possess stronger field enhancement, higher light confinement, and larger optical force than the anti-symmetric modes in the nanoscale structures. Especially, the light confinement ratio and optical force for the symmetric mode along the armchair direction of black phosphorus can reach as high as >90% and >3000 pN/mW, respectively. These results may open a new door for the light manipulation at nanoscale and the design of black phosphorus based photonic devices.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Publisher: Optical Society of America
ISSN: 1094-4087
Date of Acceptance: 22 February 2017
Last Modified: 05 Aug 2022 01:46
URI: https://orca.cardiff.ac.uk/id/eprint/119595

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