![]() We consider classical dynamical properties of a particle in a constant Quantum dynamics of exciton-polaritons, which can lead to novel functionalities Our findings pave the way for studies of non-Hermitian Switching and topological Berry phase for a parameter loop encircling theĮxceptional point. Structure exclusive to non-Hermitian systems. By varying parameters of the billiard, we observe crossing andĪnti-crossing of energy levels and reveal the nontrivial topological modal Phenomena, such as unidirectional transport, anomalous lasing/absorption, andĬhiral modes. Eigenmodes of this billiard exhibit multiple non-Hermitian spectralĭegeneracies - exceptional points. Spatially-structured optical pump, we create a chaotic exciton-polaritonīilliard. Quantum transport, localisation, and dynamical properties. Non-Hermiticity dramatically modifies the structure of modes and spectralĭegeneracies in exciton-polariton systems, and, therefore, will affect their However, the inherent non-Hermitian nature of this potential has so farīeen largely ignored in exciton-polariton physics. Thus, theĮxciton-polaritons always exist in a balanced potential landscape of gain and Open (i.e., non-Hermitian) quantum system: it requires constant pumping ofĮnergy and continuously decays releasing coherent radiation. Importantly, exciton-polaritons are a profoundly Next-generation optoelectronic applications as well as fundamental studies of They have emerged as a robust solid-state platform for Interacting photons and excitons (electron-hole pairs) in semiconductor Compared with other chaotic behaviours resulted from the random scattering inside deformed cavities, we demonstrate chaotic dynamics purely on a curved surface, which may shed light on the better understanding of chaos in optics.Įxciton-polaritons are hybrid light-matter quasiparticles formed by strongly The photon sphere of the torus is identified as the transition position from ordered states to chaotic states. By tuning the deformation parameter of the torus, we observe the transition of the billiard from the ordered phase state to mixed phase states and then complete ray chaos. The ray chaotic behaviours on the deformed toroidal surface are explored using the geodesic equation. Here, we study the non-Euclidean billiard of a torus-like manifold, which is a closed 2D cavity system with effective periodic boundaries. While extensive study about wave chaos has been made in deformed microcavities, investigation of how chaos dynamics evolves in curved space manifold remains elusive. Light–matter interaction in chaotic systems has been utilised for improving broadband energy harvesting and momentum transformations, achieving light localization beyond diffraction limit and even stabilizing the dynamics of high power laser. With the advancement in understanding of the physics inside chaotic systems, chaos has been harnessed from a nuisance to a beneficial factor in optical devices.
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