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.
Kim, H.
1e7c5a0b-2b45-40a9-b1d2-329a258aa277
Rogers, E.T.F.
b92cc8ab-0d91-4b2e-b5c7-8a2f490a36a2
28 January 2020
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).
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
Published date: 28 January 2020
Additional Information:
Funding Information:
This work was supported by Korean Ministry of Science, ICT (Grant No. 2019R1F1A1063151) and Hongik University new faculty research support fund.
Publisher Copyright:
© 2020, The Author(s).
Identifiers
Local EPrints ID: 442056
URI: http://eprints.soton.ac.uk/id/eprint/442056
ISSN: 2045-2322
PURE UUID: 50e604b6-36e1-4248-ae7e-01c026c27616
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Date deposited: 06 Jul 2020 16:31
Last modified: 16 Mar 2024 08:22
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Author:
H. Kim
Author:
E.T.F. Rogers
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