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Microengineering of optical properties of GeO2 glass by ultrafast laser nanostructuring

Microengineering of optical properties of GeO2 glass by ultrafast laser nanostructuring
Microengineering of optical properties of GeO2 glass by ultrafast laser nanostructuring
Nanostructuring in glass by ultrafast laser paves the way for integrated optics. In this paper, form birefringence induced by ultrafast laser direct writing in GeO2 glass is systematically investigated. It is shown that the pulse energy for maximum retardance in GeO2 glass is ≈65% lower than in fused silica. The induced retardance by laser scanning is two times higher than that by stationary irradiation under the same processing conditions. The optimum pulse duration for maximum retardance in GeO2 glass lies within sub-picosecond region, i.e., typically around 500 fs, while in fused silica it is in the picosecond regime at around 1–2 ps. A reversed polarization dependence of retardance at low pulse densities and low pulse repetition rates is observed in GeO2 glass. As a result, two optical applications including a radial polarization vortex converter and a computer-generated hologram are demonstrated in GeO2 glass by spatial manipulation of the optical axis of the locally induced form birefringence. The microengineering of optical properties of GeO2 glass by ultrafast laser direct writing may lead to new applications in near-/mid-infrared optics.
2195-1071
Zhang, Fangteng
2e6cb7ad-9bd8-485e-b436-e2449afa7f6f
Čerkauskaite, Aušra
7f5b1e7a-b9f9-41d2-ab4d-307a46605e43
Drevinskas, Rokas
23f858b5-8750-4113-ba11-49cfefc3dbb7
Kazansky, Peter
a5d123ec-8ea8-408c-8963-4a6d921fd76c
Qiu, Jiarong
befa87a1-4795-4e67-b74f-81239eee689c
Zhang, Fangteng
2e6cb7ad-9bd8-485e-b436-e2449afa7f6f
Čerkauskaite, Aušra
7f5b1e7a-b9f9-41d2-ab4d-307a46605e43
Drevinskas, Rokas
23f858b5-8750-4113-ba11-49cfefc3dbb7
Kazansky, Peter
a5d123ec-8ea8-408c-8963-4a6d921fd76c
Qiu, Jiarong
befa87a1-4795-4e67-b74f-81239eee689c

Zhang, Fangteng, Čerkauskaite, Aušra, Drevinskas, Rokas, Kazansky, Peter and Qiu, Jiarong (2017) Microengineering of optical properties of GeO2 glass by ultrafast laser nanostructuring. Advanced Optical Materials, 5 (23), [1700342]. (doi:10.1002/adom.201700342).

Record type: Article

Abstract

Nanostructuring in glass by ultrafast laser paves the way for integrated optics. In this paper, form birefringence induced by ultrafast laser direct writing in GeO2 glass is systematically investigated. It is shown that the pulse energy for maximum retardance in GeO2 glass is ≈65% lower than in fused silica. The induced retardance by laser scanning is two times higher than that by stationary irradiation under the same processing conditions. The optimum pulse duration for maximum retardance in GeO2 glass lies within sub-picosecond region, i.e., typically around 500 fs, while in fused silica it is in the picosecond regime at around 1–2 ps. A reversed polarization dependence of retardance at low pulse densities and low pulse repetition rates is observed in GeO2 glass. As a result, two optical applications including a radial polarization vortex converter and a computer-generated hologram are demonstrated in GeO2 glass by spatial manipulation of the optical axis of the locally induced form birefringence. The microengineering of optical properties of GeO2 glass by ultrafast laser direct writing may lead to new applications in near-/mid-infrared optics.

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AOM-SUBMISSION-revision_v2 - Accepted Manuscript
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Accepted/In Press date: 8 August 2017
e-pub ahead of print date: 18 October 2017
Published date: 1 December 2017

Identifiers

Local EPrints ID: 415080
URI: http://eprints.soton.ac.uk/id/eprint/415080
ISSN: 2195-1071
PURE UUID: a4bb67b3-96f4-4a8b-aef7-e4a8df958b61
ORCID for Aušra Čerkauskaite: ORCID iD orcid.org/0000-0002-2476-7797

Catalogue record

Date deposited: 25 Oct 2017 16:30
Last modified: 07 Oct 2020 05:04

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