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), 2200-2202. (doi:10.1364/OL.27.002200).
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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.
|Subjects:||Q Science > QB Astronomy
Q Science > QC Physics
Q Science > QD Chemistry
|Divisions:||University Structure - Pre August 2011 > School of Electronics and Computer Science
University Structure - Pre August 2011 > Optoelectronics Research Centre
University Structure - Pre August 2011 > School of Physics and Astronomy
|Date Deposited:||13 Aug 2008|
|Last Modified:||18 Aug 2015 12:09|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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