Optothermal nonlinearity of silica aerogel
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 . DOI: 10.1063/1.4959240
Publication
Applied Physics Letters
Status
Peer reviewed
ISSN
0003-6951Type
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).Items in the St Andrews Research Repository are protected by copyright, with all rights reserved, unless otherwise indicated.