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Non-reciprocal ultrafast laser writing

Non-reciprocal ultrafast laser writing
Non-reciprocal ultrafast laser writing
Photosensitivity is a material property that is relevant to many phenomena and applications, from photosynthesis and photography to optical data storage and ultrafast laser writing. It was commonly thought that, in a homogeneous medium, photosensitivity and the corresponding light-induced material modifications do not change on reversing the direction of light propagation. Here we demonstrate that when the direction of the femtosecond laser beam is reversed from the +z to –z direction, the structures written in LiNbO3 crystal when translating the beam along the +y and –y directions are mirrored. In a non-centrosymmetric medium, modification of the material can therefore differ for light propagating in opposite directions. This is the first evidence of a new optical phenomenon of non-reciprocal photosensitivity. We interpret this effect in terms of light pressure and associated heat flow, resulting in a temperature gradient in homogeneous media without inversion symmetry under uniform intense irradiation.
Yang, Weijia
ecad1a03-22e3-4a91-b6e6-a5f8660e2ab4
Kazansky, Peter G
a5d123ec-8ea8-408c-8963-4a6d921fd76c
Svirko, Yuri P
d64a0366-ef29-4a31-878e-54f7536816ac
Yang, Weijia
ecad1a03-22e3-4a91-b6e6-a5f8660e2ab4
Kazansky, Peter G
a5d123ec-8ea8-408c-8963-4a6d921fd76c
Svirko, Yuri P
d64a0366-ef29-4a31-878e-54f7536816ac

Yang, Weijia, Kazansky, Peter G and Svirko, Yuri P (2008) Non-reciprocal ultrafast laser writing. CLEO/QELS 2008, California, USA. 04 - 08 May 2008.

Record type: Conference or Workshop Item (Paper)

Abstract

Photosensitivity is a material property that is relevant to many phenomena and applications, from photosynthesis and photography to optical data storage and ultrafast laser writing. It was commonly thought that, in a homogeneous medium, photosensitivity and the corresponding light-induced material modifications do not change on reversing the direction of light propagation. Here we demonstrate that when the direction of the femtosecond laser beam is reversed from the +z to –z direction, the structures written in LiNbO3 crystal when translating the beam along the +y and –y directions are mirrored. In a non-centrosymmetric medium, modification of the material can therefore differ for light propagating in opposite directions. This is the first evidence of a new optical phenomenon of non-reciprocal photosensitivity. We interpret this effect in terms of light pressure and associated heat flow, resulting in a temperature gradient in homogeneous media without inversion symmetry under uniform intense irradiation.

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More information

Published date: 2008
Venue - Dates: CLEO/QELS 2008, California, USA, 2008-05-04 - 2008-05-08

Identifiers

Local EPrints ID: 76336
URI: http://eprints.soton.ac.uk/id/eprint/76336
PURE UUID: f8affe3d-807a-4d0e-be0c-ae62e07ebe8b

Catalogue record

Date deposited: 22 Mar 2010
Last modified: 20 May 2021 16:33

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