scholarly journals Vortex solitons at the interface between two photonic lattices

2013 ◽  
Vol 11 (1) ◽  
pp. 75-83
Author(s):  
Dragana Jovic ◽  
Aleksandra Piper ◽  
Dejan Timotijevic
Keyword(s):  
Numerical Analysis ◽  
Discrete Vortex ◽  
Vortex States ◽  
Photonic Lattices ◽  
Phase Structures ◽  
Lower Beam ◽  
Vortex Solitons ◽  
Dynamical Instabilities ◽  
Discrete Solitons ◽  
Topological Charges

Using numerical analysis we demonstrate the existence of vortex solitons at the interface separating two different photonic lattices. We consider the conditions for the existence of discrete vortex states at such interface and also study their stability. A novel type of interface vortex solitons with five lobes is observed. Also different topological charges and phase structures of such solutions are studied, as well as influence of different lattice intensities. Other observed solutions are in the form of discrete solitons with six lobes. For lower beam powers such solutions are stable during propagation, but for higher beam powers they oscillate during propagation in a way indicating the exchange of power between neighboring lobes, or show dynamical instabilities.

Anisotropy-controlled topological stability of discrete vortex solitons in optically induced photonic lattices

2010 ◽  
Vol 35 (4) ◽  
pp. 604 ◽  
Author(s):  
Bernd Terhalle ◽  
Dennis Göries ◽  
Tobias Richter ◽  
Patrick Rose ◽  
Anton S. Desyatnikov ◽  
...  
Keyword(s):  
Topological Stability ◽  
Discrete Vortex ◽  
Photonic Lattices ◽  
Vortex Solitons ◽  
Optically Induced

scholarly journals Experiments on Linear and Nonlinear Localization of Optical Vortices in Optically Induced Photonic Lattices

2012 ◽  
Vol 2012 ◽  
pp. 1-10 ◽  
Author(s):  
Daohong Song ◽  
Cibo Lou ◽  
Liqin Tang ◽  
Zhuoyi Ye ◽  
Jingjun Xu ◽  
...  
Keyword(s):  
Defect Modes ◽  
Discrete Vortex ◽  
Nonlinear Localization ◽  
Photonic Lattices ◽  
Vortex Solitons ◽  
Linear And Nonlinear ◽  
Singly Charged ◽  
Doubly Charged ◽  
Recent Experimental Work ◽  
Optically Induced

We provide a brief overview on our recent experimental work on linear and nonlinear localization of singly charged vortices (SCVs) and doubly charged vortices (DCVs) in two-dimensional optically induced photonic lattices. In the nonlinear case, vortex propagation at the lattice surface as well as inside the uniform square-shaped photonic lattices is considered. It is shown that, apart from the fundamental (semi-infinite gap) discrete vortex solitons demonstrated earlier, the SCVs can self-trap into stable gap vortex solitons under the normal four-site excitation with a self-defocusing nonlinearity, while the DCVs can be stable only under an eight-site excitation inside the photonic lattices. Moreover, the SCVs can also turn into stable surface vortex solitons under the four-site excitation at the surface of a semi-infinite photonics lattice with a self-focusing nonlinearity. In the linear case, bandgap guidance of both SCVs and DCVs in photonic lattices with a tunable negative defect is investigated. It is found that the SCVs can be guided at the negative defect as linear vortex defect modes, while the DCVs tend to turn into quadrupole-like defect modes provided that the defect strength is not too strong.

scholarly journals Observation of Discrete Vortex Solitons in Optically Induced Photonic Lattices

2004 ◽  
Vol 92 (12) ◽  
Author(s):  
Dragomir N. Neshev ◽  
Tristram J. Alexander ◽  
Elena A. Ostrovskaya ◽  
Yuri S. Kivshar ◽  
Hector Martin ◽  
...  
Keyword(s):  
Discrete Vortex ◽  
Photonic Lattices ◽  
Vortex Solitons ◽  
Optically Induced

scholarly journals Observation of double-charge discrete vortex solitons in hexagonal photonic lattices

2009 ◽  
Vol 79 (4) ◽  
Author(s):  
Bernd Terhalle ◽  
Tobias Richter ◽  
Kody J. H. Law ◽  
Dennis Göries ◽  
Patrick Rose ◽  
...  
Keyword(s):  
Discrete Vortex ◽  
Photonic Lattices ◽  
Vortex Solitons ◽  
Double Charge

scholarly journals Discrete Solitons and Soliton-Induced Dislocations in Partially Coherent Photonic Lattices

2004 ◽  
Vol 92 (12) ◽  
Author(s):  
Hector Martin ◽  
Eugenia D. Eugenieva ◽  
Zhigang Chen ◽  
Demetrios N. Christodoulides
Keyword(s):  
Photonic Lattices ◽  
Partially Coherent ◽  
Discrete Solitons

Anisotropic photonic lattices and discrete solitons in photorefractive media

2006 ◽  
Vol 86 (3) ◽  
pp. 399-405 ◽  
Author(s):  
B. Terhalle ◽  
A.S. Desyatnikov ◽  
C. Bersch ◽  
D. Träger ◽  
L. Tang ◽  
...  
Keyword(s):  
Photonic Lattices ◽  
Discrete Solitons

Impulsively-Started Flow About Four Types of Bluff Body

1982 ◽  
Vol 104 (2) ◽  
pp. 207-213 ◽  
Author(s):  
T. Sarpkaya ◽  
H. K. Kline
Keyword(s):  
Numerical Analysis ◽  
Circular Cylinder ◽  
Bluff Body ◽  
Discrete Vortex

Measurement of the forces acting on a circular cylinder and those on three other noncircular cylinders is reported. The results confirm and quantify the profound effects of the shedding of the first two or three vortices on all the characteristics of resistance and demonstrate that the evolution of the flow, and hence the forces, significantly depend on whether the separation points are fixed or mobile, or a combination thereof. The data are expected to form the basis of future numerical analysis based on refined discrete vortex models.

Discrete Solitons in Photonic Lattices with Topological Defects

2011 ◽  
Author(s):  
Matthias Heinrich ◽  
Robert Keil ◽  
Felix Dreisow ◽  
Andreas Tünnermann ◽  
Stefan Nolte ◽  
...  
Keyword(s):  
Topological Defects ◽  
Photonic Lattices ◽  
Discrete Solitons

Observation of Vortex-Ring “Discrete” Solitons in 2D Photonic Lattices

2004 ◽  
Vol 92 (12) ◽  
Author(s):  
Jason W. Fleischer ◽  
Guy Bartal ◽  
Oren Cohen ◽  
Ofer Manela ◽  
Mordechai Segev ◽  
...  
Keyword(s):  
Vortex Ring ◽  
Photonic Lattices ◽  
Discrete Solitons
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