Perturbation of transmission matrices in nonlinear random media
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Random media with tailored optical properties are attracting burgeoning interest for applications in imaging, biophysics, energy, nanomedicine, spectroscopy, cryptography and telecommunications. A key paradigm for devices based on this class of materials is the transmission matrix, the tensoriallink between the input and the output signals, that describes in full their optical behavior. The transmission matrix has specific statistical properties, as the existence of lossless channels, that can be used to transmit information, and are determined by the disorder distribution. In nonlinear materials, these channels may be modulated and the transmission matrix tuned accordingly. Here wereport the direct measurement of the nonlinear transmission matrix of complex materials, exploiting the strong optothermal nonlinearity of scattering Silica Aerogel (SA). We show that the dephasing effects due to nonlinearity are both controllable and reversible, opening the road to applicationsbased on the nonlinear response of random media.
Fleming , A , Conti , C & Di Falco , A 2019 , ' Perturbation of transmission matrices in nonlinear random media ' , annalen der physik , vol. Early View , 1900091 . https://doi.org/10.1002/andp.201900091
annalen der physik
Copyright © 2019 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim. 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 https://doi.org/10.1002/andp.201900091
DescriptionThis project was supported by Sapienza Visiting scholarship scheme. A.D.F. and A.F. thank EPSRC (EP/M508214/1). C.C. acknowledges H2020 QuantERA Quomplex (grant number 731743).
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