Controllable high-speed polariton waves in a PT-symmetric lattice

Ma, Xuekai; Kartashov, Yaroslav Y; Gao, Tingge; Schumacher, Stefan

doi:10.1088/1367-2630/ab5a9b

Cited by 6 publications

(3 citation statements)

References 42 publications

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“…Particularly, a chaotic excitonpolariton billiard has been demonstrated to exhibit multiple non-Hermitian spectra where the EP physics can be explored (see figure 17(a)) [253,254]. Similar non-Hermitian concepts have been extended to different platforms and degrees of freedom in exciton-polariton systems, such as two dipole modes in a non-Hermitian resonator (see figure 17(d)) [255,256] and synthetic band-structure engineering [257,258]. Specifically, two coupled semiconducting micropillars can form a bosonic Josephson junction that supports PT phase transitions and EPs [259].…”

Section: Plasmonics and Exciton-polaritons-based Systemsmentioning

confidence: 99%

Topological physics of non-Hermitian optics and photonics: a review

Wang

Zhang

Hua

et al. 2021

J. Opt.

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The notion of non-Hermitian optics and photonics rooted in quantum mechanics and photonic systems has recently attracted considerable attention ushering in tremendous progress on theoretical foundations and photonic applications, benefiting from the flexibility of photonic platforms. In this review, we first introduce the non-Hermitian topological physics from the symmetry of matrices and complex energy spectra to the characteristics of Jordan normal forms, exceptional points, biorthogonal eigenvectors, Bloch/non-Bloch band theories, topological invariants and topological classifications. We further review diverse non-Hermitian system branches ranging from classical optics, quantum photonics to disordered systems, nonlinear dynamics and optomechanics according to various physical equivalences and experimental implementations. In particular, we include cold atoms in optical lattices in quantum photonics due to their operability at quantum regimes. Finally, we summarize recent progress and limitations in this emerging field, giving an outlook on possible future research directions in theoretical frameworks and engineering aspects.

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Section: Plasmonics and Exciton-polaritons-based Systemsmentioning

confidence: 99%

Topological physics of non-Hermitian optics and photonics: a review

Wang

Zhang

Hua

et al. 2021

J. Opt.

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“…In an excitation regime where polaritons behave like bosonic quasi-particles, they can experience condensation and show spontaneous macroscopic coherence under nonresonant excitation, − as shown in Figure (a). Thanks to the spontaneous decay of photons from the microcavity, polaritons are inherently driven-dissipative in nature and as such offer the ability to study PT symmetry , and non-Hermitian physics. , Also in a coupled polariton microresonator it was demonstrated that relaxation kinetics plays a crucial role in the condensation process under asymmetric pumping . Polariton dimers can be used to explore polariton–polariton nonlinear interactions with Josephson oscillations, quantum self-trapping, interplay of interference and nonlinearity, and bistability .…”

Section: Introductionmentioning

confidence: 99%

Switching Off a Microcavity Polariton Condensate near the Exceptional Point

Hatzopoulos

et al. 2022

ACS Photonics

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An exceptional point (EP) arises when both the eigenvectors and eigenvalues coalesce, which in a physical system can be achieved by engineering the gain and loss coefficients, leading to a wide variety of counterintuitive phenomena. In photonic systems, the loss and gain are generally realized by the special design of the samples. Light−matter hybrid exciton polaritons, however, are inherent non-Hermitian systems in which EPs can be approached easier such as in virtue of nonlinearity. In this work we demonstrate the existence of an EP in an exciton polariton condensate in a double-well potential. Near the EP, the polariton condensate localized in one potential well can be switched off by an additional optical excitation in the other well with very low (far below threshold) power, which surprisingly induces additional loss into the system. Increasing the power of the additional laser leads to a situation in which gain dominates in both wells again, such that the polaritons recondense in the two potential wells. The switching off near the EP can also be realized by the polariton nonlinearity induced blueshift in the same structure. Our results offer a simple way to optically manipulate the polariton condensation process in a double-well potential. Extending such a configuration to complex potential well lattices offers exciting prospects to explore high-order EPs and non-Hermitian topological photonics in a nonequilibrium many-body system.

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“…1(a). Thanks to the spontaneous decay of photons from the microcavity, polariton systems are inherently driven-dissipative in na- ture and as such provide an excellent platform to study PT symmetry [23] and non-Hermitian physics. In our previous works [24,25] we demonstrated that the polariton condensate wavefunction and energy distribution can be strongly modified by the gain and loss coefficients in an optical billiard.…”

mentioning

confidence: 99%

Switching off microcavity polariton condensate near the exceptional point

Li¹,

Ma²,

Hatzopoulos³

et al. 2021

Preprint

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Controllable high-speed polariton waves in a PT-symmetric lattice

Cited by 6 publications

References 42 publications

Topological physics of non-Hermitian optics and photonics: a review

Topological physics of non-Hermitian optics and photonics: a review

Switching Off a Microcavity Polariton Condensate near the Exceptional Point

Switching off microcavity polariton condensate near the exceptional point

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