Experimental Control of Unstable Patterns and Elimination of Spatiotemporal Disorder in Nonlinear Optics

Benkler, E.; Kreuzer, M.; Neubecker, R.; Tschudi, Τ.

doi:10.1103/physrevlett.84.879

Cited by 45 publications

(26 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…40 Even in regimes where the patterns become spatio-temporal disordered these solutions including the hexagonal solution were noninvasively stabilized at control strengths of only a few percent. Furthermore, by measuring the amplitudes of the patterns this method allows to determine the otherwise experimentally not accessible bifurcation diagram of the unstable solutions.…”

Section: ͑23͒mentioning

confidence: 99%

Control and manipulation of solitary structures in a nonlinear optical single feedback experiment

Gütlich

Neubecker

Kreuzer

et al. 2003

Chaos: An Interdisciplinary Journal of Nonlinear Science

Self Cite

View full text Add to dashboard Cite

We report on the addressing and control of the lateral positions of optical spatial solitary structures in a single feedback experiment with a saturable Kerr nonlinearity. Solitary structures allow a locally self-confined switching between a dark background and a bright state. This binary character can be of use to all-optically route information in optical networks. In general the lateral positions of solitary structures are strongly influenced by mutual interactions and system inhomogeneities. For potential photonic applications these interactions must be controllable. Therefore a noninvasive interferometric control method based on spatial Fourier filtering is studied in order to position solitary structures. Numerical and experimental results show that solitary structures can be aligned to periodic grids of different scale with hexagonal or square geometries.

show abstract

Section: ͑23͒mentioning

confidence: 99%

Control and manipulation of solitary structures in a nonlinear optical single feedback experiment

Gütlich

Neubecker

Kreuzer

et al. 2003

Chaos: An Interdisciplinary Journal of Nonlinear Science

Self Cite

View full text Add to dashboard Cite

show abstract

“…The system's transverse translational symmetry is thus spontaneously broken, resulting in periodic or quasiperiodic modulational patterns, e.g., stripes and hexagons, in the intensity profile. These spontaneously formed optical patterns have been observed in experiments with lasers, 9,10 and such passive optical systems as atomic gases, [11][12][13][14] liquid crystal light valves, 15 photorefractive crystals, 16 and, most recently, semiconductor quantum well microcavities. 17 (For general reviews, see, e.g., Refs.…”

Section: Introductionmentioning

confidence: 76%

“…The terms in Eq. (15) can also be interpreted the same way. We will discuss the density transferring processes in more detail below.…”

Section: Reduced Modelsmentioning

confidence: 94%

Transverse optical instability patterns in semiconductor microcavities: Polariton scattering and low-intensity all-optical switching

et al. 2013

View full text Add to dashboard Cite

We present a detailed theoretical study of transverse exciton-polariton patterns in semiconductor quantum well microcavities. These patterns are initiated by directional instabilities (driven mainly by polariton-polariton scattering) in the uniform pump-generated polariton field and are measured as optical patterns in a transverse plane in the far field. Based on a microscopic many-particle theory, we investigate the spatiotemporal dynamics of the formation, selection, and optical control of these patterns. An emphasis is placed on a previously proposed low-intensity, all-optical switching scheme designed to exploit these instability-driven patterns. Simulations and detailed analyses of simplified and more physically transparent models are used. Two aspects of the problem are studied in detail. First, we study the dependencies of the stability behaviors of various patterns, as well as transition time scales, on parameters relevant to the switching action. These parameters are the degree of built-in azimuthal anisotropy in the system and the switching (control) beam intensity. It is found that if the parameters are varied incrementally, the pattern system undergoes abrupt transitions at threshold parameter values, which are accompanied by multiple-stability and hysteresis behaviors. Moreover, during a real-time switching action, the transient dynamics of the system, in particular, the transition time scale, may depend significantly on the proximity of unstable patterns. The second aspect is a classification and detailed analysis of the polariton scattering processes contributing to the pattern dynamics, giving us an understanding of the selection and control of patterns as results of these processes' intricate interplay. The crucial role played by the (relative) phases of the polariton amplitudes in determining the gains and/or losses of polariton densities in various momentum modes is highlighted. As a result of this analysis, an interpretation of the actions of the various processes in terms of concepts commonly used in classical pattern-forming systems is given.

show abstract

“…A secondary instability leads to roll dislocations [284]. It has been shown experimentally that using a Fourier filtered control signal can stabilize selectively unstable periodic patterns and can eliminate spatially chaotic regimes [285]. Defects can be swept out of a spontaneously formed hexagonal intensity pattern containing several dislocation-type defects using Fourier filtering [286].…”

Section: Liquid Crystal Cellsmentioning

confidence: 99%

Transverse dynamics in cavity nonlinear optics (2000–2003)

Mandel

Tlidi

2004

J. Opt. B: Quantum Semiclass. Opt.

131

View full text Add to dashboard Cite

show abstract

Experimental Control of Unstable Patterns and Elimination of Spatiotemporal Disorder in Nonlinear Optics

Cited by 45 publications

References 12 publications

Control and manipulation of solitary structures in a nonlinear optical single feedback experiment

Control and manipulation of solitary structures in a nonlinear optical single feedback experiment

Transverse optical instability patterns in semiconductor microcavities: Polariton scattering and low-intensity all-optical switching

Transverse dynamics in cavity nonlinear optics (2000–2003)

Contact Info

Product

Resources

About