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Birefringent Fresnel zone plates in silica fabricated by femtosecond laser machining

Birefringent Fresnel zone plates in silica fabricated by femtosecond laser machining
Birefringent Fresnel zone plates in silica fabricated by femtosecond laser machining
We demonstrate maskless, single-step fabrication of strongly birefringent Fresnel zone plates by focusing of femtosecond laser pulses deep within silica substrates. The process allows us to produce alternate zone rings directly by inducing a local refractive-index modification of the order of n~10-2 . The embedded zone plates shown in this Letter exhibit efficiencies that vary by as much as a factor of ~6 for orthogonal polarizations. Focal lengths of primary and secondary foci are shown to compare well with theory.
0146-9592
2200-2202
Bricchi, Erica
d7b5197d-d574-4276-b2a9-74e7b2427970
Mills, John D.
3b139ebc-5875-4367-80e6-f7e94cf2d6a8
Kazansky, Peter G.
a5d123ec-8ea8-408c-8963-4a6d921fd76c
Klappauf, Bruce G.
34a7555b-88d7-4776-81c7-a3f859db4c36
Baumberg, Jeremy J.
51423b5f-bdb8-4851-8d50-472253ceb12c
Bricchi, Erica
d7b5197d-d574-4276-b2a9-74e7b2427970
Mills, John D.
3b139ebc-5875-4367-80e6-f7e94cf2d6a8
Kazansky, Peter G.
a5d123ec-8ea8-408c-8963-4a6d921fd76c
Klappauf, Bruce G.
34a7555b-88d7-4776-81c7-a3f859db4c36
Baumberg, Jeremy J.
51423b5f-bdb8-4851-8d50-472253ceb12c

Bricchi, Erica, Mills, John D., Kazansky, Peter G., Klappauf, Bruce G. and Baumberg, Jeremy J. (2002) Birefringent Fresnel zone plates in silica fabricated by femtosecond laser machining. Optics Letters, 27 (24), 2200-2202. (doi:10.1364/OL.27.002200).

Record type: Article

Abstract

We demonstrate maskless, single-step fabrication of strongly birefringent Fresnel zone plates by focusing of femtosecond laser pulses deep within silica substrates. The process allows us to produce alternate zone rings directly by inducing a local refractive-index modification of the order of n~10-2 . The embedded zone plates shown in this Letter exhibit efficiencies that vary by as much as a factor of ~6 for orthogonal polarizations. Focal lengths of primary and secondary foci are shown to compare well with theory.

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Published date: December 2002

Identifiers

Local EPrints ID: 57124
URI: http://eprints.soton.ac.uk/id/eprint/57124
ISSN: 0146-9592
PURE UUID: c66ad429-afa5-460f-a2f3-da5a4d3face7

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Date deposited: 13 Aug 2008
Last modified: 13 Mar 2019 20:34

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Contributors

Author: Erica Bricchi
Author: John D. Mills
Author: Bruce G. Klappauf
Author: Jeremy J. Baumberg

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