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Void-Nanograting Transition by Ultrashort Laser Pulse Irradiation in Silica Glass

Void-Nanograting Transition by Ultrashort Laser Pulse Irradiation in Silica Glass
Void-Nanograting Transition by Ultrashort Laser Pulse Irradiation in Silica Glass
The structural evolution from void modification to self-assembled nanogratings in fused silica is observed for moderate (NA > 0.4) focusing conditions. Void formation, appears before the geometrical focus after the initial few pulses and after subsequent irradiation, nanogratings gradually occur at the top of the induced structures. Nonlinear Schrödinger equation based simulations are conducted to simulate the laser fluence, intensity and electron concentration in the regions of modification. Comparing the experiment with simulations, the voids form due to cavitation in the regions where electron concentration exceeds 1020 cm-3 but is below critical. In this scenario, the energy absorption is insufficient to reach the critical electron concentration that was once assumed to occur in the regime of void formation and nanogratings, shedding light on the potential formation mechanism of nanogratings.
University of Southampton
Dai, Ye
5b53b9dd-be8d-46a6-b6c7-0842da523d31
Patel, Aabid
19aacdf5-c01e-4122-94b6-a29c10485952
Song, Juan
dc482b80-3272-47a9-bb34-a70a7b4479ec
Beresna, Martynas
a6dc062e-93c6-46a5-aeb3-8de332cdec7b
Kazansky, Peter
a5d123ec-8ea8-408c-8963-4a6d921fd76c
Dai, Ye
5b53b9dd-be8d-46a6-b6c7-0842da523d31
Patel, Aabid
19aacdf5-c01e-4122-94b6-a29c10485952
Song, Juan
dc482b80-3272-47a9-bb34-a70a7b4479ec
Beresna, Martynas
a6dc062e-93c6-46a5-aeb3-8de332cdec7b
Kazansky, Peter
a5d123ec-8ea8-408c-8963-4a6d921fd76c

Dai, Ye, Patel, Aabid, Song, Juan, Beresna, Martynas and Kazansky, Peter (2016) Void-Nanograting Transition by Ultrashort Laser Pulse Irradiation in Silica Glass. University of Southampton doi:10.5258/SOTON/385798 [Dataset]

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Abstract

The structural evolution from void modification to self-assembled nanogratings in fused silica is observed for moderate (NA > 0.4) focusing conditions. Void formation, appears before the geometrical focus after the initial few pulses and after subsequent irradiation, nanogratings gradually occur at the top of the induced structures. Nonlinear Schrödinger equation based simulations are conducted to simulate the laser fluence, intensity and electron concentration in the regions of modification. Comparing the experiment with simulations, the voids form due to cavitation in the regions where electron concentration exceeds 1020 cm-3 but is below critical. In this scenario, the energy absorption is insufficient to reach the critical electron concentration that was once assumed to occur in the regime of void formation and nanogratings, shedding light on the potential formation mechanism of nanogratings.

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More information

Published date: 2016
Additional Information: Data for related publication: http://eprints.soton.ac.uk/3399255
Organisations: Optoelectronics Research Centre, ORC Research
Projects:
Printed Optics by Ultrafast Laser Nanostructuring of Glass
Funded by: UNSPECIFIED (EP/M029042/1)
1 July 2015 to 30 June 2018

Identifiers

Local EPrints ID: 385798
URI: http://eprints.soton.ac.uk/id/eprint/385798
PURE UUID: c73ae6c0-3e75-49ff-8f22-782c9ba5610c
ORCID for Aabid Patel: ORCID iD orcid.org/0000-0001-9902-5192

Catalogue record

Date deposited: 09 Aug 2016 11:18
Last modified: 19 Jul 2017 01:03

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Contributors

Creator: Ye Dai
Creator: Aabid Patel ORCID iD
Creator: Juan Song
Creator: Martynas Beresna
Creator: Peter Kazansky

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