Transverse Localization of light: Towards a paradigm shift from trivial to non-trivial lattice
03 Aug 2020-
TL;DR: In this article, a direct transition of trivial optical lattice to its non-trivial counterpart verified by customization of bandgap is reported, and numerical simulations show that no localization transition is observed in non-Trivial lattices due to deliberate refractive index disorder.
Abstract: Direct transition of trivial optical lattice to its non-trivial counterpart verified by customization of bandgap is reported. Numerical simulations show that no localization transition is observed in non-trivial lattices due to deliberate refractive-index disorder. ©2019 The Author(s).
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TL;DR: Topological photonics is a rapidly emerging field of research in which geometrical and topological ideas are exploited to design and control the behavior of light as mentioned in this paper, which holds great promise for applications.
Abstract: Topological photonics is a rapidly emerging field of research in which geometrical and topological ideas are exploited to design and control the behavior of light. Drawing inspiration from the discovery of the quantum Hall effects and topological insulators in condensed matter, recent advances have shown how to engineer analogous effects also for photons, leading to remarkable phenomena such as the robust unidirectional propagation of light, which hold great promise for applications. Thanks to the flexibility and diversity of photonics systems, this field is also opening up new opportunities to realize exotic topological models and to probe and exploit topological effects in new ways. This article reviews experimental and theoretical developments in topological photonics across a wide range of experimental platforms, including photonic crystals, waveguides, metamaterials, cavities, optomechanics, silicon photonics, and circuit QED. A discussion of how changing the dimensionality and symmetries of photonics systems has allowed for the realization of different topological phases is offered, and progress in understanding the interplay of topology with non-Hermitian effects, such as dissipation, is reviewed. As an exciting perspective, topological photonics can be combined with optical nonlinearities, leading toward new collective phenomena and novel strongly correlated states of light, such as an analog of the fractional quantum Hall effect.
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TL;DR: In this paper, the signature of localized light in an ultrafast laser-inscribed (ULI) disordered lattice that contains an array of evanescently coupled, one-dimensional optical waveguides in glass was observed.
Abstract: We present initial results of the direct observation of the signature of localized light in an ultrafast laser-inscribed (ULI) disordered lattice that contains an array of evanescently coupled, one-dimensional optical waveguides in glass in which certain amount of disorder in refractive index was introduced. Numerical simulations were carried out to test the feasibility of the initial experimental design. Such configurable ULI disordered waveguide lattices should open up a platform for investigating the phenomenon of transverse localization of light and its statistical nature.
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12 Feb 2020
TL;DR: In this article, the exotic behavior of light in one dimensional optical waveguide lattices with selective doping was reported and the presence of gain in such lattices reduced the critical transition distance from ballistic to diffusive domain and guided the light to propagate in super-diffusive regime after certain distance.
Abstract: This paper reports on exotic behavior of light in one dimensional optical waveguide lattices with selective doping. The presence of gain in such lattices reduces the critical transition distance from ballistic to diffusive domain and guides the light to propagate in super-diffusive regime after certain distance. These findings may may lead to disordered lasing and also assist in image projection/transport.
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