Observation of topological transformations of optical vortices in two-dimensional photonic lattices.
Anna Bezryadina,Dragomir N. Neshev,Anton S. Desyatnikov,Jack Young,Zhigang Chen,Yuri S. Kivshar +5 more
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TLDR
For the first time, the nontrivial topological transformations of the discrete vortex including the flipping of vortex charge and inversion of its orbital angular momentum are described theoretically and observed in experiment.Abstract:
We study interaction of a discrete vortex with a supporting photonic lattice and analyze how the combined action of the lattice periodicity and the medium nonlinearity can modify the vortex structure. In particular, we describe theoretically and observe in experiment, for the first time to our knowledge, the nontrivial topological transformations of the discrete vortex including the flipping of vortex charge and inversion of its orbital angular momentum. We also demonstrate the stabilizing effect of the interaction with the so-called “mixed” optically-induced photonic lattices on the vortex propagation and topological structure.read more
Citations
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Book ChapterDOI
Soliton Shape and Mobility Control in Optical Lattices
TL;DR: In this article, a progress overview focused on the recent theoretical and experimental advances in the area of soliton manipulation in optical lattices is presented, where the authors consider reconfigurable optically-induced lattices as well as waveguide arrays made in suitable nonlinear materials.
Journal ArticleDOI
Vortex beam generation with variable topological charge based on a spiral slit
TL;DR: In this article, a vortex beam generator based on a nanometer spiral slit and exploring the propagation rule of the topological charge was proposed. But the authors did not consider the effect of the propagation distance on the topology of the vortex beam.
Journal ArticleDOI
Stable vortex soliton in nonlocal media with orientational nonlinearity.
TL;DR: It is shown how these nonlinear vortex beams can be formed and confined in extraordinary optical waves by employing the cell with no lateral boundary conditions and the application of an external magnetic field that effectively controls the molecular direction and propagation of the self-trapped beams.
Journal ArticleDOI
Particlelike Behavior of Topological Defects in Linear Wave Packets in Photonic Graphene.
Zhaoyang Zhang,Feng Li,Feng Li,Guillaume Malpuech,Yiqi Zhang,O. Bleu,Sergei V. Koniakhin,Changbiao Li,Yanpeng Zhang,Min Xiao,Min Xiao,Dmitry Solnyshkov +11 more
TL;DR: This work studies the formation, evolution, and interaction of optical vortices in wave packets at the Dirac point in photonic graphene, and shows that while their exact behavior goes beyond theDirac equation and requires a full account of the lattice properties, it can be still approximately described by an effective theory.
Journal ArticleDOI
Dipole azimuthons and vortex charge flipping in nematic liquid crystals.
TL;DR: Self-trapped laser beams carrying phase singularities in nematic liquid crystals are demonstrated and the astigmatic transformation of vortex beams into spiraling dipole azimuthons accompanied by power-dependent charge-flipping of the on-axis phase singularity is observed.
References
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A revolution in optical manipulation
TL;DR: This research presents the next generation of single-beam optical traps, which promise to take optical tweezers out of the laboratory and into the mainstream of manufacturing and diagnostics and even become consumer products.
Journal ArticleDOI
Discrete solitons in photorefractive optically induced photonic lattices
Nikos K. Efremidis,Suzanne Sears,Demetrios N. Christodoulides,Jason W. Fleischer,Jason W. Fleischer,Mordechai Segev,Mordechai Segev +6 more
TL;DR: It is demonstrated that optical discrete solitons are possible in appropriately oriented biased photorefractive crystals in optically induced periodic waveguide lattices that are created via plane-wave interference and paves the way towards the observation of entirely new families of discretesolitons.
Journal ArticleDOI
Topological charge and angular momentum of light beams carrying optical vortices
Marat S. Soskin,Vyacheslav N. Gorshkov,Mikhail V. Vasnetsov,J. T. Malos,Norman R. Heckenberg +4 more
TL;DR: In this article, the properties of light beams carrying phase singularities, or optical vortices, were studied both in theory and experiment, and the general rule for angular-momentum density distribution in a combined beam was established.
Journal ArticleDOI
Observation of discrete vortex solitons in optically induced photonic lattices
Dragomir N. Neshev,Tristram J. Alexander,Elena A. Ostrovskaya,Yuri S. Kivshar,Hector Martin,Hector Martin,Igor Makasyuk,Igor Makasyuk,Zhigang Chen,Zhigang Chen +9 more
TL;DR: This work reports on the first experimental observation of discrete vortex solitons in two-dimensional optically induced photonic lattices and demonstrates strong stabilization of an optical vortex by the lattice in a self-focusing nonlinear medium.