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Observation of parity–time symmetry in optics
One of the fundamental axioms of quantum mechanics is associated with the Hermiticity of physical observables 1 . In the case of the Hamiltonian operator, this requirement not only implies real…
Phase Retrieval with Application to Optical Imaging: A contemporary overview
- Y. Shechtman, Yonina C. Eldar, O. Cohen, H. Chapman, J. Miao, M. Segev
- PhysicsIEEE Signal Processing Magazine
- 2 April 2015
The goal is to describe the current state of the art in this area, identify challenges, and suggest future directions and areas where signal processing methods can have a large impact on optical imaging and on the world of imaging at large.
Transport and Anderson localization in disordered two-dimensional photonic lattices
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.
Discrete Solitons in Optics
Photonic Floquet topological insulators
This work proposes and experimentally demonstrate a photonic topological insulator free of external fields and with scatter-free edge transport—a photonic lattice exhibiting topologically protected transport of visible light on the lattice edges.
Edge-Mode Lasing in 1D Topological Active Arrays.
The experimental and theoretical results demonstrate that, in the presence of chiral-time symmetry, this non-Hermitian topological structure can experience phase transitions that are dictated by a complex geometric phase.
Topological insulator laser: Experiments
This work demonstrates an all-dielectric magnet-free topological insulator laser, with desirable properties stemming from the topological transport of light in the laser cavity, and demonstrates higher slope efficiencies compared to those of the topologically trivial counterparts.
Topological insulator laser: Theory
It is demonstrated that topological insulator lasers are theoretically possible and experimentally feasible and shown that the underlying topological properties lead to highly efficient lasers, robust to defects and disorder, with single-mode lasing even at conditions high above the laser threshold.
Topologically protected bound states in photonic parity-time-symmetric crystals.
This work shows theoretically and experimentally the existence of states that are localized at the interface between two topologically distinct PT-symmetric photonic lattices, and finds analytical closed form solutions of topological PT-Symmetric interface states.
Observation of two-dimensional discrete solitons in optically induced nonlinear photonic lattices
This work uses optical induction, the interference of two or more plane waves in a photosensitive material, to create a 2D photonic lattice in which the solitons form, paving the way for the realization of a variety of nonlinear localization phenomena inPhotonic lattices and crystals.