Disorder-induced single-mode transmission

Giancarlo Ruocco, Behnam Abaie, Walter Schirmacher, Arash Mafi and Marco Leonetti ()
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Giancarlo Ruocco: Center for Life Nano Science@Sapienza, Istituto Italiano di Tecnologia
Behnam Abaie: Center for High Technology Materials, University of New Mexico
Walter Schirmacher: Center for Life Nano Science@Sapienza, Istituto Italiano di Tecnologia
Arash Mafi: Center for High Technology Materials, University of New Mexico
Marco Leonetti: Center for Life Nano Science@Sapienza, Istituto Italiano di Tecnologia

Nature Communications, 2017, vol. 8, issue 1, 1-6

Abstract: Abstract Localized states trap waves propagating in a disordered potential and play a crucial role in Anderson localization, which is the absence of diffusion due to disorder. Some localized states are barely coupled with neighbours because of differences in wavelength or small spatial overlap, thus preventing energy leakage to the surroundings. This is the same degree of isolation found in the homogeneous core of a single-mode optical fibre. Here we show that localized states of a disordered optical fibre are single mode: the transmission channels possess a high degree of resilience to perturbation and invariance with respect to the launch conditions. Our experimental approach allows identification and characterization of the single-mode transmission channels in a disordered matrix, demonstrating low losses and densely packed single modes. These disordered and wavelength-sensitive channels may be exploited to de-multiplex different colours at different locations.

Date: 2017
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DOI: 10.1038/ncomms14571

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