Surface gap solitons in exciton polariton condensates

  title={Surface gap solitons in exciton polariton condensates},
  author={Ting-Wei Chen and Szu-Cheng Cheng},
  journal={Physical Review E},
A gap soliton is a solitonic state existing inside the band gap of an infinite-periodic exciton-polariton condensate (EPC). The combination of surface states and gap solitons forms the so named surface gap solitons (SGSs). We analyze the existence of SGSs near the interface between uniform and semi-infinite periodic EPCs. We find that SGSs exist only when the system is excited by a pump with low power and small width. As the pump power or width increases, SGSs become unstable. 
3 Citations

Figures from this paper

Polariton surface solitons under a resonant pump.

We address the formation of stable dissipative surface solitons in the exciton-polariton condensate in a one-dimensional array of microcavity pillars under the action of a localized resonant pump



Dark gap solitons in exciton-polariton condensates in a periodic potential.

We show that dark spatial gap solitons can occur inside the band gap of an exciton-polariton condensate (EPC) in a one-dimensional periodic potential. The energy dispersions of an EPC loaded into a

Surface gap solitons.

The existence of surface gap solitons at the interface between uniform media and an optical lattice with defocusing nonlinearity is put forward and it is discovered that gap surfacesolitons exist only when the lattice depth exceeds a threshold value, and that they can be made completely stable and form stable bound states.

Observation of surface gap solitons in semi-infinite waveguide arrays.

The crossover between linear repulsion and nonlinear attraction at the surface is studied, revealing the mechanism of nonlinearity-mediated stabilization of the surface gap modes.

Dissipative surface solitons in periodic structures

We report dissipative surface solitons forming at the interface between a semi-infinite lattice and a homogeneous Kerr medium. The solitons exist due to the balance between amplification in the

Self-localization of polariton condensates in periodic potentials.

It is revealed that the self-localization of exciton-polaritons in the lattice may occur both in the gaps and bands of the single-particle linear spectrum, and is dominated by the effects of gain and dissipation rather than the structured potential, in sharp contrast to the conservative condensates of ultracold alkali atoms.

Polariton condensation in solitonic gap states in a one-dimensional periodic potential

This work reports spontaneous condensation in localized gap soliton states in a one-dimensional microcavity with a periodic modulation in a building block for polaritonic circuits, where propagation and localization are optically controlled and reconfigurable.

Gap solitons in Ginzburg-Landau media.

We introduce a model combining basic elements of conservative systems which give rise to gap solitons, i.e., a periodic potential and self-defocusing cubic nonlinearity, and dissipative terms

Bright Bose-Einstein gap solitons of atoms with repulsive interaction.

The first experimental observation of bright matter wavesolitons for 87Rb atoms with repulsive atom-atom interaction is reported, allowing the systematic investigation of gap solitons.

Spatial solitons supported by localized gain in nonlinear optical waveguides

We introduce a modification of the complex Ginzburg-Landau (CGL) equation with background linear loss and locally applied gain. The equation appertains to laser cavities based on planar waveguides,