Exceptional points in anisotropic planar microcavities

Abstract

Planar microcavities allow the control and manipulation of spin-polarization, manifested in phenomena like the optical spin Hall effect due to the intrinsic polarization mode splitting. Here, we study a transparent microcavity with broken rotational symmetry, realized by aligning the optical axis of a uniaxial cavity material in the cavity plane. We demonstrate that the in-plane optical anisotropy gives rise to exceptional points in the dispersion relation, which occur pair-wise, are circularly polarized, and are cores of polarization vortices. These exceptional points are a result of the non-Hermitian character of the system, and are in close relationship to singular optical axes in absorptive biaxial systems.

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• The Singular Optical Axes in Biaxial Crystals and Analysis of Their Spectral Dispersion Effects in $\beta$-Ga${}_2$O${}_3$
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Cited by in corpus (11)

• Direct measurement of the quantum geometric tensor in a two-dimensional continuous medium
• Electrically tunable Berry curvature and strong light-matter coupling in birefringent perovskite microcavities at room temperature
• Quantum metric and wavepackets at exceptional points in non-Hermitian systems
• From the topological spin-Hall effect to the non-Hermitian skin effect in an elliptical micropillar chain
• Moving along an exceptional surface towards a higher-order exceptional point
• Higher-order exceptional points in composite non-Hermitian systems
• Bulk-boundary correspondence in topological systems with the momentum dependent energy shift
• Anisotropic exciton-polaritons reveal non-Hermitian topology in van der Waals materials
• Zero-Threshold PT-Symmetric Polariton-Raman Laser
• Direct Measurement of a Non-Hermitian Topological Invariant in a Hybrid Light-Matter System
• Distance between exceptional points and diabolic points and its implication for the response strength of non-Hermitian systems