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Effect of a weak longitudinal modulation in refractive index on transverse localization of light in 1D disordered waveguide lattices

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TLDR
In this paper, the effect of transverse localization of light (TL) in the presence of a weak longitudinal modulation of refractive index in disordered waveguide lattices was investigated and it was shown that tunneling inhibition along length favors to achieve the diffraction-free propagation along with the simultaneous presence of Transverse disorder.
Abstract
We report the enhancement of the effect of transverse localization of light (TL) in presence of a weak longitudinal modulation of refractive index in disordered waveguide lattices. In our chosen lattices, tunneling inhibition along length favors to achieve the diffraction-free propagation along with the simultaneous presence of transverse disorder. Results will be useful to tune the threshold value of disorder to achieve localized light.

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Journal ArticleDOI

Absence of Diffusion in Certain Random Lattices

TL;DR: In this article, a simple model for spin diffusion or conduction in the "impurity band" is presented, which involves transport in a lattice which is in some sense random, and in them diffusion is expected to take place via quantum jumps between localized sites.
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Discretizing light behaviour in linear and nonlinear waveguide lattices.

TL;DR: Light propagating in linear and nonlinear waveguide lattices exhibits behaviour characteristic of that encountered in discrete systems, which can be exploited to achieve diffraction-free propagation and minimize the power requirements for nonlinear processes.
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Transport and Anderson localization in disordered two-dimensional photonic lattices

TL;DR: The experimental observation of Anderson localization in a perturbed periodic potential is reported: the transverse localization of light caused by random fluctuations on a two-dimensional photonic lattice, demonstrating how ballistic transport becomes diffusive in the presence of disorder, and that crossover to Anderson localization occurs at a higher level of disorder.
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Anderson localization and nonlinearity in one-dimensional disordered photonic lattices.

TL;DR: An intermediate regime is found in which the ballistic and localized components coexist while diffusive dynamics is absent and evidence is found for a faster transition into localization under nonlinear conditions.
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Speckle-free laser imaging using random laser illumination

TL;DR: Exploiting the low spatial coherence of specifically designed random lasers, researchers demonstrate speckle-free full-field imaging in the regime of intense optical scattering.
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