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Sub-wavelength annular-slit-assisted superoscillatory lens for longitudinally-polarized super-resolution focusing

Sub-wavelength annular-slit-assisted superoscillatory lens for longitudinally-polarized super-resolution focusing
Sub-wavelength annular-slit-assisted superoscillatory lens for longitudinally-polarized super-resolution focusing
A binary metallic superoscillatory lens assisted with annular subwavelength slits is proposed, which generates a longitudinally-polarized super-resolution focal point. The annular slits are designed to selectively transmit radially-polarized light. Simulations using the finite element method show a 0.24 λ focal spot with 21.8 dB of polarization purity and only 0.342 dB reduction in efficiency compared to a standard superoscillatory lens.
2045-2322
Kim, H.
1e7c5a0b-2b45-40a9-b1d2-329a258aa277
Rogers, E.T.F.
b92cc8ab-0d91-4b2e-b5c7-8a2f490a36a2
Kim, H.
1e7c5a0b-2b45-40a9-b1d2-329a258aa277
Rogers, E.T.F.
b92cc8ab-0d91-4b2e-b5c7-8a2f490a36a2

Kim, H. and Rogers, E.T.F. (2020) Sub-wavelength annular-slit-assisted superoscillatory lens for longitudinally-polarized super-resolution focusing. Scientific Reports, 10 (1), [1328]. (doi:10.1038/s41598-019-56810-3).

Record type: Article

Abstract

A binary metallic superoscillatory lens assisted with annular subwavelength slits is proposed, which generates a longitudinally-polarized super-resolution focal point. The annular slits are designed to selectively transmit radially-polarized light. Simulations using the finite element method show a 0.24 λ focal spot with 21.8 dB of polarization purity and only 0.342 dB reduction in efficiency compared to a standard superoscillatory lens.

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More information

Accepted/In Press date: 11 December 2019
e-pub ahead of print date: 28 January 2020

Identifiers

Local EPrints ID: 442056
URI: http://eprints.soton.ac.uk/id/eprint/442056
ISSN: 2045-2322
PURE UUID: 50e604b6-36e1-4248-ae7e-01c026c27616

Catalogue record

Date deposited: 06 Jul 2020 16:31
Last modified: 28 Jul 2020 16:45

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