Azimuthons and pattern formation in annularly confined exciton-polariton Bose-Einstein condensates

Li, Guangyao

doi:10.1103/physreva.93.013837

Cited by 15 publications

(17 citation statements)

References 73 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…7(c)] corresponds to a dipole azimuthon [38] containing a vortex-antivortex pair. This state is a member of a general family of densitymodulated vortex states well studied in the context of coherent optical waves [39], ultracold atomic matter waves [40], and exciton-polariton condensates [41]. The dynamical behavior demonstrated in Figs.…”

Section: Mode Synchronization In a Two-component Condensatementioning

confidence: 97%

Spontaneous formation and synchronization of vortex modes in optically induced traps for exciton-polariton condensates

2016

View full text Add to dashboard Cite

We study the dynamics of exciton-polariton condensates in reconfigurable potentials created by an incoherent optical pump. The mode selection in the effective optically induced trap is shown to be determined by the largest growth rates of the linear eigenmodes of the effective complex potential created by the pump. We demonstrate that selection of higher order nonlinear modes with nonzero orbital angular momenta in such traps leads to formation of vortices in a single-component condensate and spin textures in exciton-polariton condensates consisting of two polarization components. We also show that cross-polarization coupling can lead to the synchronization of the modes belonging to different polarizations. We highlight clear signatures of the various spontaneously formed trapped states in the cavity photoluminescence spectrum, which should aid in their experimental observations.

show abstract

Section: Mode Synchronization In a Two-component Condensatementioning

confidence: 97%

Spontaneous formation and synchronization of vortex modes in optically induced traps for exciton-polariton condensates

2016

View full text Add to dashboard Cite

show abstract

“…Clearly some potentials will favor this conflict between the parities as shown above, whereas others show no sudden transitions in the condensate parity. As an example, annular pump shapes are used to create cylindrically symmetric conden- sates 51 to investigate the onset of spontaneous currents 52 , vorticity 53 , and petal formation [54][55][56] . Here, a single annular shaped pump results in a single condensate with well defined phase corresponding to circulating current (see Fig.…”

Section: E Generalization To Symmetric and Trapping Geometriesmentioning

confidence: 99%

Parity bifurcations in trapped multistable phase locked exciton-polariton condensates

2018

View full text Add to dashboard Cite

We present a theoretical scheme for multistability in planar microcavity exciton-polariton condensates under nonresonant driving. Using an excitation profile resulting in a spatially patterned condensate, we observe organized phase locking which can abruptly reorganize as a result of pump induced instability made possible by nonlinear interactions. For π/2 symmetric systems this reorganization can be regarded as a parity transition and is found to be a fingerprint of multistable regimes existing over a finite range of excitation strengths. The natural degeneracy of the planar equations of motion gives rise to parity bifurcation points where the condensate, as a function of excitation intensity, bifurcates into one of two anisotropic degenerate solutions. Deterministic transitions between multistable states are made possible using controlled nonresonant pulses, perturbing the solution from one attractor to another.

show abstract

“…Rotating solitons presented here are somewhat reminiscent of azimuthons, which have been reported earlier in scalar configurations in a self-focusing medium 45 and in spinor condensates with the Josephson coupling, rather than with spin-orbit one. 49 In contrast to conventional azimuthons our structures are supported by repulsive nonlinearity and localized radially due to Bragg reflection from radially-periodic potential. Two-and four-peak rotating at the left black arrow, while at the right black arrow these states turn into vortices with l ± = (−1, 1).…”

Section: Rotating Solitonsmentioning

confidence: 65%

Spin–Orbit Coupled Polariton Condensates in a Radially Periodic Potential: Multiring Vortices and Rotating Solitons

et al. 2018

View full text Add to dashboard Cite

We address evolution of a spinor polariton condensate in radially periodic potentials.Such potentials allow for the observation of novel nonlinear excitations and support a variety of dynamically stable soliton states never demonstrated before in polariton condensates, including ring-like solitons with density peaks located in different radial minima of the potential and extended dynamically stable multiring patterns. Among the advantages of the system is that azimuthal modulational instabilities are suppressed due to dominating repulsive interactions between polaritons with the same spin, thereby allowing for the stabilization of radially-symmetric states. The representative feature of this system is that spin-orbit coupling between different spinor components requires them to carry different topological charges. Radially-symmetric states carrying different combinations of topological charges are discussed. Radially symmetric potentials also support stable rotating multipeaked solitons, whose properties unexpectedly depend not only on the magnitude of the rotation velocity, but also on its sign, i.e., on the rotation direction. The latter property is a consequence of spin-orbit coupling which breaks the equivalence between clockwise and counterclockwise rotations. The multiring structures are shown to be robust against unavoidable losses and are therefore amenable to observations with the presently available experimental techniques.Keywords polariton condensates, solitons, radial potentials, spin-orbit coupling Many-body interactions can play crucial role in quantum condensed matter systems and result in the appearance of the collective phenomena, which can not be qualitatively explained using the picture of non-interacting or weakly interacting particles. Well-known examples include such phenomena as superfluidity, superconductivity, ferromagnetism, fractional quantum Hall states, and many others. When strong inter-particle interactions are treated in the framework of the mean-field approximation, the behavior of the bosonic system can be well described by certain nonlinear wave equation for its macroscopic wavefunction, 1 while the particular form of this equation is defined by the physical nature of the system. The presence of nonlinearity drastically modifies the behavior of excitations in such systems and may result in spontaneous pattern formation, 2 turbulence, 3 appearance of self-sustained excitations, such as solitons 4 and topological vortex-carrying modes. 5The standard platform for the investigation of the coherent nonlinear phenomena in condensed matter is based on cold atoms. Such systems, however, require extremely low

show abstract

Azimuthons and pattern formation in annularly confined exciton-polariton Bose-Einstein condensates

Cited by 15 publications

References 73 publications

Spontaneous formation and synchronization of vortex modes in optically induced traps for exciton-polariton condensates

Spontaneous formation and synchronization of vortex modes in optically induced traps for exciton-polariton condensates

Parity bifurcations in trapped multistable phase locked exciton-polariton condensates

Spin–Orbit Coupled Polariton Condensates in a Radially Periodic Potential: Multiring Vortices and Rotating Solitons

Contact Info

Product

Resources

About