Birefringent Fresnel zone plates in silica fabricated by femtosecond laser machining


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), pp. 2200-2202. (doi:10.1364/OL.27.002200).

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Description/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.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1364/OL.27.002200
ISSNs: 0146-9592 (print)
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ePrint ID: 57124
Date :
Date Event
December 2002Published
Date Deposited: 13 Aug 2008
Last Modified: 16 Apr 2017 17:40
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/57124

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