Far field subwavelength focusing using optical eigenmodes
Far field subwavelength focusing using optical eigenmodes
We report the focusing of light to generate a subdiffractive, subwavelength focal spot of full width half maximum 222 nm at an operating wavelength of 633 nm using an optical eigenmode approach. Crucially, the spot is created in the focal plane of a microscope objective thus yielding a practical working distance for applications. The optical eigenmode approach is implemented using an optimal superposition of Bessel beams on a spatial light modulator. The effects of partial coherence are also discussed. This far field method is a key advance toward the generation of subdiffractive optical features for imaging and lithographic purposes.
Baumgartl, Jörg
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Kosmeier, Sebastian
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Mazilu, Michael
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Rogers, Edward T.F.
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Zheludev, Nikolay I.
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Dholakia, Kishan
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Baumgartl, Jörg
0c82c31f-d968-4bd9-8c98-611ba1d179dd
Kosmeier, Sebastian
4027b755-8860-4c85-93eb-bb33d98ca832
Mazilu, Michael
abc73a0d-8200-46f6-a2b9-47d82541c479
Rogers, Edward T.F.
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Zheludev, Nikolay I.
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Dholakia, Kishan
c649b0a9-ab68-4571-b8c7-e84553d14174
Baumgartl, Jörg, Kosmeier, Sebastian, Mazilu, Michael, Rogers, Edward T.F., Zheludev, Nikolay I. and Dholakia, Kishan
(2011)
Far field subwavelength focusing using optical eigenmodes.
Applied Physics Letters, 98 (18), [181109].
(doi:10.1063/1.3587636).
Abstract
We report the focusing of light to generate a subdiffractive, subwavelength focal spot of full width half maximum 222 nm at an operating wavelength of 633 nm using an optical eigenmode approach. Crucially, the spot is created in the focal plane of a microscope objective thus yielding a practical working distance for applications. The optical eigenmode approach is implemented using an optimal superposition of Bessel beams on a spatial light modulator. The effects of partial coherence are also discussed. This far field method is a key advance toward the generation of subdiffractive optical features for imaging and lithographic purposes.
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e-pub ahead of print date: 6 May 2011
Organisations:
Optoelectronics Research Centre
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Local EPrints ID: 355871
URI: http://eprints.soton.ac.uk/id/eprint/355871
ISSN: 0003-6951
PURE UUID: 7baad3a4-6d5b-41bb-b5a8-6af9dfbf7f49
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Date deposited: 09 Sep 2013 09:24
Last modified: 15 Mar 2024 02:44
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Contributors
Author:
Jörg Baumgartl
Author:
Sebastian Kosmeier
Author:
Michael Mazilu
Author:
Edward T.F. Rogers
Author:
Nikolay I. Zheludev
Author:
Kishan Dholakia
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