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Form birefringence and negative index change created by femtosecond direct writing in transparent materials

Form birefringence and negative index change created by femtosecond direct writing in transparent materials
Form birefringence and negative index change created by femtosecond direct writing in transparent materials
Although femtosecond lasers have proved to be of great utility for micromachining within bulk transparent materials, little is known about the fundamental physics that drive the process. Depending on the laser intensity delivered to the sample, any of three types of feature can be written into the glass. We observed that in the intermediate regime there is a correlation among the negative sign of the effective index change, the presence of anisotropic reflection, and birefringence. We propose a model that can explain all three principal characteristics. Results show that the local index change can be as high as 10-1
0146-9592
119-121
Bricchi, Erica
d7b5197d-d574-4276-b2a9-74e7b2427970
Klappauf, Bruce G.
34a7555b-88d7-4776-81c7-a3f859db4c36
Kazansky, Peter G.
a5d123ec-8ea8-408c-8963-4a6d921fd76c
Bricchi, Erica
d7b5197d-d574-4276-b2a9-74e7b2427970
Klappauf, Bruce G.
34a7555b-88d7-4776-81c7-a3f859db4c36
Kazansky, Peter G.
a5d123ec-8ea8-408c-8963-4a6d921fd76c

Bricchi, Erica, Klappauf, Bruce G. and Kazansky, Peter G. (2004) Form birefringence and negative index change created by femtosecond direct writing in transparent materials. Optics Letters, 29 (1), 119-121. (doi:10.1364/OL.29.000119).

Record type: Article

Abstract

Although femtosecond lasers have proved to be of great utility for micromachining within bulk transparent materials, little is known about the fundamental physics that drive the process. Depending on the laser intensity delivered to the sample, any of three types of feature can be written into the glass. We observed that in the intermediate regime there is a correlation among the negative sign of the effective index change, the presence of anisotropic reflection, and birefringence. We propose a model that can explain all three principal characteristics. Results show that the local index change can be as high as 10-1

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Published date: January 2004

Identifiers

Local EPrints ID: 13933
URI: http://eprints.soton.ac.uk/id/eprint/13933
ISSN: 0146-9592
PURE UUID: 38d2b529-cd90-4dba-84d6-8678229006b1

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Date deposited: 31 Dec 2004
Last modified: 16 Dec 2019 19:26

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Author: Erica Bricchi
Author: Bruce G. Klappauf

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