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Patterned birefringent polarization converters fabricated by femtosecond laser direct writing

Patterned birefringent polarization converters fabricated by femtosecond laser direct writing
Patterned birefringent polarization converters fabricated by femtosecond laser direct writing
Under certain exposure conditions, focused femtosecond light pulses can induce self-assembled nanogratings inside bulk of fused silica glass. Orientation of nanogratings is always perpendicular to incident light polarization. Induced nanograting period varies from 140 nm to 320 nm. By changing incident light power and polarization orientation we can control induced retardance and slow axis of fabricated birefringent patterns. Induced nanogratings exhibit birefringence that provide retardance as large as 260 nm, which is sufficient for performing the required polarization conversion at visible and near-infrared wavelengths. Recently radially polarized optical vortex converter, Fresnel zone plates, polarization diffractive gratings, radial or azimuthal polarization converters were fabricated by inducing nanogratings in fused silica bulk.
Gertus, T.
9b72115f-546c-4f68-80b6-b4d58e5a3f50
Kazansky, P.G.
a5d123ec-8ea8-408c-8963-4a6d921fd76c
Gertus, T.
9b72115f-546c-4f68-80b6-b4d58e5a3f50
Kazansky, P.G.
a5d123ec-8ea8-408c-8963-4a6d921fd76c

Gertus, T. and Kazansky, P.G. (2014) Patterned birefringent polarization converters fabricated by femtosecond laser direct writing. The 15th International Symposium on Laser Precision Microfabrication, Vilnius, Lithuania. 16 - 19 Jun 2014.

Record type: Conference or Workshop Item (Paper)

Abstract

Under certain exposure conditions, focused femtosecond light pulses can induce self-assembled nanogratings inside bulk of fused silica glass. Orientation of nanogratings is always perpendicular to incident light polarization. Induced nanograting period varies from 140 nm to 320 nm. By changing incident light power and polarization orientation we can control induced retardance and slow axis of fabricated birefringent patterns. Induced nanogratings exhibit birefringence that provide retardance as large as 260 nm, which is sufficient for performing the required polarization conversion at visible and near-infrared wavelengths. Recently radially polarized optical vortex converter, Fresnel zone plates, polarization diffractive gratings, radial or azimuthal polarization converters were fabricated by inducing nanogratings in fused silica bulk.

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e-pub ahead of print date: June 2014
Additional Information: Th3-O-9
Venue - Dates: The 15th International Symposium on Laser Precision Microfabrication, Vilnius, Lithuania, 2014-06-16 - 2014-06-19
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 368312
URI: http://eprints.soton.ac.uk/id/eprint/368312
PURE UUID: 73322dde-42c6-489b-97d8-f16ac3b62c03

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Date deposited: 11 Sep 2014 12:50
Last modified: 10 Jul 2020 16:36

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