Perturbation of transmission matrices in nonlinear random media

Adam Fleming, Claudio Conti, Andrea Di Falco

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)
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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.
Original languageEnglish
Article number1900091
JournalAnnalen der Physik
VolumeEarly View
Early online date19 Jul 2019
Publication statusE-pub ahead of print - 19 Jul 2019


  • Light scattering
  • Nonlinearity
  • Optothermal
  • Random media
  • Transmission matrices


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