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Far field subwavelength focusing using optical eigenmodes

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.
0003-6951
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.
3be2c93d-7ac1-4c09-8652-f031ca7e4b0f
Zheludev, Nikolay I.
32fb6af7-97e4-4d11-bca6-805745e40cc6
Dholakia, Kishan
c649b0a9-ab68-4571-b8c7-e84553d14174
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.
3be2c93d-7ac1-4c09-8652-f031ca7e4b0f
Zheludev, Nikolay I.
32fb6af7-97e4-4d11-bca6-805745e40cc6
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). (doi:10.1063/1.3587636).

Record type: Article

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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More information

e-pub ahead of print date: 6 May 2011
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 355871
URI: https://eprints.soton.ac.uk/id/eprint/355871
ISSN: 0003-6951
PURE UUID: 7baad3a4-6d5b-41bb-b5a8-6af9dfbf7f49
ORCID for Nikolay I. Zheludev: ORCID iD orcid.org/0000-0002-1013-6636

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Date deposited: 09 Sep 2013 09:24
Last modified: 12 Nov 2019 02:02

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Contributors

Author: Jörg Baumgartl
Author: Sebastian Kosmeier
Author: Michael Mazilu
Author: Edward T.F. Rogers
Author: Kishan Dholakia

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