Non-reciprocal ultrafast laser writing
Yang, Weijia, Kazansky, Peter G and Svirko, Yuri P (2008) Non-reciprocal ultrafast laser writing. In, CLEO/QELS 2008, California, USA, 05 - 09 May 2008.
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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.
|Item Type:||Conference or Workshop Item (Paper)|
|Subjects:||T Technology > TK Electrical engineering. Electronics Nuclear engineering
Q Science > QC Physics
|Divisions:||University Structure - Pre August 2011 > Optoelectronics Research Centre
|Date Deposited:||22 Mar 2010|
|Last Modified:||22 Jul 2012 03:11|
|Contributors:||Yang, Weijia (Author)
Kazansky, Peter G (Author)
Svirko, Yuri P (Author)
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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