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Tailored surface birefringence by femtosecond laser assisted wet etching

Tailored surface birefringence by femtosecond laser assisted wet etching
Tailored surface birefringence by femtosecond laser assisted wet etching
Surface texturing is demonstrated by the combination of wet etching and ultrafast laser nanostructuring of silica glass. Using potassium hydroxide (KOH) at room temperature as an etchant of laser modified glass, we show the polarization dependent linear increase in retardance reaching a threefold value within 25 hours. The dispersion control of birefringence by the etching procedure led to achromatic behaviour over the entire visible spectral range. The mechanism of enhanced KOH etching selectivity after femtosecond laser exposure is discussed and correlated to the formation of various laser-induced defects, such as silicon-rich oxygen deficiency and color centers.
1094-4087
1428-1437
Drevinskas, Rokas
23f858b5-8750-4113-ba11-49cfefc3dbb7
Gecevičius, Mindaugas
271576ee-dd9d-40b3-ab2f-19686b91dc64
Beresna, Martynas
a6dc062e-93c6-46a5-aeb3-8de332cdec7b
Bellouard, Yves
50467062-29d4-4f06-a65c-7ef44d183550
Kazansky, Peter G.
a5d123ec-8ea8-408c-8963-4a6d921fd76c
Drevinskas, Rokas
23f858b5-8750-4113-ba11-49cfefc3dbb7
Gecevičius, Mindaugas
271576ee-dd9d-40b3-ab2f-19686b91dc64
Beresna, Martynas
a6dc062e-93c6-46a5-aeb3-8de332cdec7b
Bellouard, Yves
50467062-29d4-4f06-a65c-7ef44d183550
Kazansky, Peter G.
a5d123ec-8ea8-408c-8963-4a6d921fd76c

Drevinskas, Rokas, Gecevičius, Mindaugas, Beresna, Martynas, Bellouard, Yves and Kazansky, Peter G. (2015) Tailored surface birefringence by femtosecond laser assisted wet etching. Optics Express, 23 (2), 1428-1437. (doi:10.1364/OE.23.001428).

Record type: Article

Abstract

Surface texturing is demonstrated by the combination of wet etching and ultrafast laser nanostructuring of silica glass. Using potassium hydroxide (KOH) at room temperature as an etchant of laser modified glass, we show the polarization dependent linear increase in retardance reaching a threefold value within 25 hours. The dispersion control of birefringence by the etching procedure led to achromatic behaviour over the entire visible spectral range. The mechanism of enhanced KOH etching selectivity after femtosecond laser exposure is discussed and correlated to the formation of various laser-induced defects, such as silicon-rich oxygen deficiency and color centers.

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More information

Accepted/In Press date: 17 November 2014
e-pub ahead of print date: 21 January 2015
Published date: 26 January 2015
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 378394
URI: https://eprints.soton.ac.uk/id/eprint/378394
ISSN: 1094-4087
PURE UUID: b7eff91d-d2b7-4f5b-9ee8-c40354d41233

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Date deposited: 29 Jun 2015 11:15
Last modified: 30 Sep 2019 18:50

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