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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).

Record type: Article


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


Local EPrints ID: 57124
ISSN: 0146-9592
PURE UUID: c66ad429-afa5-460f-a2f3-da5a4d3face7

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Date deposited: 13 Aug 2008
Last modified: 17 Jul 2017 14:29

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