Coherently switching the focusing characteristics of all-dielectric metalenses
Coherently switching the focusing characteristics of all-dielectric metalenses
Flat, gradient index, metasurface optics – in particular all-dielectric metalenses – have emerged and evolved over recent years as compact, lightweight alternative to their conventional bulk glass/crystal counterparts. Here we show that the focal properties of all-dielectric metalenses can be switched via coherent control, which is to say by changing the local electromagnetic field in the metalens plane rather than any physical or geometric property of the nanostructure or surrounding medium. The selective excitation of predominantly electric or magnetic resonant modes in the constituent cells of the metalens provides for switching, by design, of its phase profile enabling binary switching of focal length for a given lens type and, uniquely, switching between different (spherical and axicon) lens types.
27683-27693
He, Fei
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Feng, Yu
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Pi, Hailong
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Yan, Jize
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MacDonald, Kevin F.
76c84116-aad1-4973-b917-7ca63935dba5
Fang, Xu
96b4b212-496b-4d68-82a4-06df70f94a86
18 July 2022
He, Fei
0b5b12e2-82ec-407b-8e4f-a8ba024d9fb3
Feng, Yu
631d9d39-ac55-4282-ab98-5b7d0dd2682e
Pi, Hailong
e275259b-31f8-430c-89d5-0d029740d60e
Yan, Jize
786dc090-843b-435d-adbe-1d35e8fc5828
MacDonald, Kevin F.
76c84116-aad1-4973-b917-7ca63935dba5
Fang, Xu
96b4b212-496b-4d68-82a4-06df70f94a86
He, Fei, Feng, Yu, Pi, Hailong, Yan, Jize, MacDonald, Kevin F. and Fang, Xu
(2022)
Coherently switching the focusing characteristics of all-dielectric metalenses.
Optics Express, 30 (15), .
(doi:10.1364/OE.461264).
Abstract
Flat, gradient index, metasurface optics – in particular all-dielectric metalenses – have emerged and evolved over recent years as compact, lightweight alternative to their conventional bulk glass/crystal counterparts. Here we show that the focal properties of all-dielectric metalenses can be switched via coherent control, which is to say by changing the local electromagnetic field in the metalens plane rather than any physical or geometric property of the nanostructure or surrounding medium. The selective excitation of predominantly electric or magnetic resonant modes in the constituent cells of the metalens provides for switching, by design, of its phase profile enabling binary switching of focal length for a given lens type and, uniquely, switching between different (spherical and axicon) lens types.
Text
Coherent manuscript_XF
- Accepted Manuscript
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Accepted/In Press date: 9 June 2022
e-pub ahead of print date: 14 July 2022
Published date: 18 July 2022
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© 2022 OSA - The Optical Society. All rights reserved.
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Local EPrints ID: 467541
URI: http://eprints.soton.ac.uk/id/eprint/467541
ISSN: 1094-4087
PURE UUID: 4c393446-2cd4-41a9-8b27-891dcb27d507
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Date deposited: 12 Jul 2022 16:45
Last modified: 17 Mar 2024 07:22
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Author:
Fei He
Author:
Yu Feng
Author:
Hailong Pi
Author:
Xu Fang
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