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We design tailored artificial optical gauge fields with ordinary dielectric birefringent materials. Using this method, we realize a wide range of phenomena: Quantum Hall effect, Haldane Topological-Insulators, Rashba effect and more.
We study the interface between two artificial gauge fields in a 2D photonic lattice, and find the analogues of Snell's law and Fresnel coefficients of such interfaces.
We propose a new class of photonic topological insulators, for which we use synthetic dimensions to induce topologically-protected photonic propagation in the bulk of the lattice instead of around the edge.
We experimentally demonstrate, for the first time, waveguiding using artificial gauge fields. We use a system of waveguide arrays where the gauge field, arising by tilting the waveguides, affects transversal dynamics and generates guided modes.
We present the first topological laser: topologically-protected lasing in photonic honeycomb lattices. We show that the lasing modes are unidirectional and robust to defects.
We propose that waveguide array-based photonic topological insulators can be used to protect the entanglement of quantum states in photonic quantum walks. The promise of the field of ‘topological photonics’ lines in the use of the physics of the quantum Hall effect and topological insulators, usually associated with electrons passing through solid-state materials, to provide robustness to complex...
We show that entangled photons propagating along the edge of a photonic topological insulator preserve their entanglement despite edge defects of any kind. This represents a novel methodology for the transport of quantum information.
We demonstrate theoretically and experimentally topological interface states in a passive effective PT-symmetric dimerized waveguide array. The PT-symmetric system has unbroken PT symmetry: all eigenvalues in the spectrum are real, despite the system's non-Hermiticity.
We present the first PT-symmetric topological insulator system: topologically-protected transport of edge states in PT-symmetric photonic honeycomb lattices.
We present photonic topological modes without a topological edge: topologically protected states which reside at a non-topological interface in the bulk of a photonic topological insulator (a honeycomb lattice of helical waveguides).
Topological insulators have been recently extended to photonics; however, the measurement of their topological invariant has been limited to probing edge states, an indirect measure. Here we optically measure a topological invariant using only bulk information.
We show that a structure of alternating dielectric layers with deep subwavelength thicknesses exhibits novel transmission effects that depend on the order of the layers and on nanometer scale variations of the layer widths.
We review the recent progress on the first experimental demonstration of photonic topological insulators, along with a variety of new ideas associated with it.
We demonstrate a novel regime of light-disorder interactions, at which the quantum-classical Correspondence Principle breaks and quantum-behavior appears even at large quantum numbers. Our findings are supported numerically and an experiment-ready scheme is suggested.
We experimentally and theoretically demonstrate a topological transition in photonic graphene. By applying a uniaxial strain, the system transforms from one that supports states localized on the edge to one that does not.
We present photonic topological insulator-solitons: self-trapped wavepackets that form a self-localized edge states residing in the bulk of a photonic topological insulator (helical waveguide honeycomb lattice), while continuously rotating with a given directionality.
We present the observation of dispersion-free edge states in a honeycomb lattice. We show the existence of surface states on both zigzag and bearded edges, and display their dispersion-free nature by tilting the input beam
We demonstrate that the decay of leaky modes can be reduced by orders of magnitude, and controlled in a robust fashion, using a transverse refractive index gradient.
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