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Optothermal nonlinearity of silica aerogel

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Aerogel_01072016.pdf (827.9Kb)
Date
25/07/2016
Author
Braidotti, Maria Chiara
Gentilini, Silvia
Fleming, Adam
Samuels, Michiel Christiaan
Di Falco, Andrea
Conti, Claudio
Funder
EPSRC
Grant ID
EP/J004200/1
Keywords
QC Physics
DAS
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Abstract
We report on the characterization of silica aerogel thermal optical nonlinearity, obtained by z-scan technique. The results show that typical Silica Aerogels have nonlinear optical coefficient similar to that of glass (≃ 10-12m2/W), with negligible optical nonlinear absorption. The nonlinear coefficient can be increased to values in the range of 10-10m2/W by embedding an absorbing dye in the Aerogel. This value is one order of magnitude higher than that observed in the pure dye and in typical highly nonlinear materials like liquid crystals.
Citation
Braidotti , M C , Gentilini , S , Fleming , A , Samuels , M C , Di Falco , A & Conti , C 2016 , ' Optothermal nonlinearity of silica aerogel ' , Applied Physics Letters , vol. 109 , no. 4 , 041104 . https://doi.org/10.1063/1.4959240
Publication
Applied Physics Letters
Status
Peer reviewed
DOI
https://doi.org/10.1063/1.4959240
ISSN
0003-6951
Type
Journal item
Rights
Copyright 2016 the Authors. This work is made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at http://apl.aip.org/
Description
The authors acknowledge support from EPSRC (EP/J004200/1), the Templeton Foundation (grant number 58277) and the ERC project VANGUARD (grant number 664782).
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  • University of St Andrews Research
URI
http://hdl.handle.net/10023/9108

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