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Accelerating finite energy Airy beams.
We investigate the acceleration dynamics of quasi-diffraction-free Airy beams in both one- and two-dimensional configurations. We show that this class of finite energy waves can retain theirExpand
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Observation of accelerating Airy beams.
We report the first observation of Airy optical beams. This intriguing class of wave packets, initially predicted by Berry and Balazs in 1979, has been realized in both one- and two-dimensionalExpand
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Observation of PT-symmetry breaking in complex optical potentials.
In 1998, Bender and Boettcher found that a wide class of Hamiltonians, even though non-Hermitian, can still exhibit entirely real spectra provided that they obey parity-time requirements or PTExpand
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Discrete self-focusing in nonlinear arrays of coupled waveguides.
We show that a nonlinear array of coupled waveguides can exhibit discrete self-focusing that in the continuum approximation obeys the so-called nonlinear Schrödinger equation. This process has muchExpand
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Unidirectional invisibility induced by PT-symmetric periodic structures.
Parity-time (PT) symmetric periodic structures, near the spontaneous PT-symmetry breaking point, can act as unidirectional invisible media. In this regime, the reflection from one end is diminishedExpand
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Anderson localization and nonlinearity in one-dimensional disordered photonic lattices.
We experimentally investigate the evolution of linear and nonlinear waves in a realization of the Anderson model using disordered one-dimensional waveguide lattices. Two types of localizedExpand
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Discretizing light behaviour in linear and nonlinear waveguide lattices
Light propagating in linear and nonlinear waveguide lattices exhibits behaviour characteristic of that encountered in discrete systems. The diffraction properties of these systems can be engineered,Expand
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Parity–time synthetic photonic lattices
The development of new artificial structures and materials is today one of the major research challenges in optics. In most studies so far, the design of such structures has been based on theExpand
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Theory of coupled optical PT-symmetric structures.
Starting from Lagrangian principles we develop a formalism suitable for describing coupled optical parity-time symmetric systems.
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Parity-time–symmetric microring lasers
The ability to control the modes oscillating within a laser resonator is of fundamental importance. In general, the presence of competing modes can be detrimental to beam quality and spectral purity,Expand
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