Effects of Spin-Dependent Interactions on Polarization of Bright Polariton Solitons

Sich, M.; Fras, F.; Chana, J. K.; Skolnick, M. S.; Krizhanovskii, D. N.; Gorbach, Andrey V.; Hartley, Robin; Skryabin, Dmitry V.; Gavrilov, S. S.; Cerda‐Méndez, E. A.; Biermann, K.; Hey, R.; Santos, P. V.

doi:10.1103/physrevlett.112.046403

Cited by 55 publications

(43 citation statements)

References 49 publications

(53 reference statements)

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“…is the strength of the weak attractive interaction of polaritons with the opposite spins [38]. Local potential minima in ( , ) x y  are described by Gaussian functions (unless stated otherwise), so that both of them are an order of magnitude less than the energy shift induced by the lattice.…”

Section: S = -mentioning

confidence: 99%

Modulational instability and solitary waves in polariton topological insulators

Kartashov

Skryabin

2016

Optica

147

146

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lar. Energy bands of the microcavity polariton graphene are readily controlled by magnetic field and influenced by the spin-orbit coupling effects, a combination leading to formation of linear unidirectional edge states in polariton topological insulators as predicted very recently. In this work we depart from the linear limit of non-interacting polaritons and predict instabilities of the nonlinear topological edge states resulting in formation of the localized topological quasisolitons, which are exceptionally robust and immune to backscattering wavepackets propagating along the graphene lattice edge. Our results provide a background for experimental studies of nonlinear polariton topological insulators and can influence other subareas of photonics and condensed matter physics, where nonlinearities and spin-orbit effects are often important and utilized for applications.

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Section: S = -mentioning

confidence: 99%

Modulational instability and solitary waves in polariton topological insulators

Kartashov

Skryabin

2016

Optica

147

146

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“…The interplay between polaritonic dispersion and strong excitonic nonlinearity allows for the self-localization effects, i.e. spontaneous formation of quantized vortices 18,19 , the nucleation of dark solitons [20][21][22][23][24] and self-confined solutions, termed cavity polariton solitons [25][26][27][28][29] .…”

Section: Introductionmentioning

confidence: 99%

Oscillatory dynamics of nonequilibrium dissipative exciton-polariton condensates in weak-contrast lattices

Chestnov

Charukhchyan

et al. 2015

Phys. Rev. B

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We study nonlinear dynamics of exciton-polaritons in an incoherently pumped semiconductor microcavity with embedded weak-contrast lattice and coupled to an exciton reservoir. We elucidate fundamental features of non-equilibrium exciton-polariton condensate trapped in one-dimensional periodical potential close to zero momentum (so-called 'Zero-state') and to the state at the boundary of Brillouin zone ('π-state'). Within the framework of the mean-field theory, we identify different regimes of both relaxation and oscillatory dynamics of coherent exciton-polaritons governed by superpositions of Bloch eigenstates within the periodic lattice. In particular, we theoretically demonstrate stable macroscopical oscillations, akin to nonlinear Josephson oscillations, between different spectral components of a polariton condensate in the momenta-space. We elucidate a strong influence of the dissipative effects and the feedback induced by the inhomogeneity of incoherent reservoir on the dynamics of the coherent polaritons.

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“…3(a,b) with the propagation of a broad (σ x (0) = 20 µm) lower-polariton wavepacket with an imparted momentum of (a) k 0 = 0 and (b) k 0 = i 1 . The excitation around the inflexion point has already been used to generate bright solitons and soliton trains [19,20,35,36]. In these cases, the soliton mechanism is the conventional interplay between negative effective mass and repulsive nonlinear interactions.…”

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confidence: 99%

Self-Interfering Wave Packets

Colas

Laussy

2016

Phys. Rev. Lett.

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We study the propagation of non-interacting polariton wavepackets. We show how two qualitatively different concepts of mass that arise from the peculiar polariton dispersion lead to a new type of particle-like object from non-interacting fields-much like self-accelerating beams-shaped by the Rabi coupling out of Gaussian initial states. A divergence and change of sign of the diffusive mass results in a "mass wall" on which polariton wavepackets bounce back. Together with the Rabi dynamics, this yield propagation of ultrafast subpackets and ordering of a spacetime crystal.Field theory unifies the concepts of waves and particles [1]. In quantum physics, this brought at rest the dispute of the pre-second-quantization era, on the nature of the wavefunction. As one highlight of this conundrum, the coherent state emerged as an attempt by Schrödinger to prove Heisenberg that his equation is suitable to describe particles since some solutions exist that remain localized [2]. However, the reliance on an external potential and the lack of other particle properties-like resilience to collisions-makes this qualification a moot point and quantum particles are now understood as excitations of the field. The deep connection between fields and particles is not exclusively quantum and classical fields also provide a robust notion of particles, most famously with solitons [3]. The particle cohesion is here assured selfconsistently by the interactions, allowing free propagation and surviving collisions with other solitons (possibly with a phase shift). For a long time, this has been the major example of how to define a particle out of a classical field, until Berry and Balazs discovered the first case of a similar behaviour in a non-interacting context: the Airy beams [4]. These solutions to Schrödinger equation (or equivalently through the Eikonal approximation, to Maxwell equations) retain their shape as they propagate as a train of peaks (or sub-packets) and also exhibit self-healing after passing through an obstacle [5]. The ingredient powering these particle behaviours is phaseshaping, assuring the cohesion by the acceleration of the sub-packets inside the mother packet. The solution was first regarded as a mathematical curiosity as it is not normalizable, till a truncated version was experimentally realized and shown to exhibit this dramatic phenomenology but for a finite time [6]. The Airy beam is now a recognized particle-like object, in some cases emerging from fields that quantize elementary particles [7], thus behaving like a meta-particle. It is in fact but one example of a full family of so-called "accelerating beams" [8], that all similarly endow linear fields with particle properties: shape-preservation and resilience to collisions.In this Letter, we add another member to the family of mechanisms that provide non-interacting fields with particle properties. Namely, we show that two coupled fields of different masses can support self-interfering wavepack- Effective masses for the LPB as a function of momentum: in pur...

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Effects of Spin-Dependent Interactions on Polarization of Bright Polariton Solitons

Cited by 55 publications

References 49 publications

Modulational instability and solitary waves in polariton topological insulators

Modulational instability and solitary waves in polariton topological insulators

Oscillatory dynamics of nonequilibrium dissipative exciton-polariton condensates in weak-contrast lattices

Self-Interfering Wave Packets

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