Spin waves in semiconductor microcavities

Abstract

We show theoretically that a weakly interacting gas of spin-polarized exciton-polaritons in a semiconductor microcavity supports propagation of spin waves. The spin waves are characterised by a parabolic dispersion at small wavevectors which is governed by the polariton-polariton interaction constant. Due to spin-anisotropy of polariton-polariton interactions the dispersion of spin waves depends on the orientation of the total polariton spin. For the same reason, the frequency of homogeneous spin precession/polariton spin resonance depends on their polarization degree.

5 pages, 3 figures + Supplement with 2 figures

References in corpus (19)

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• Polarization hydrodynamics in a one-dimensional polariton condensate
• Optical orientation of the homogeneous non-equilibrium Bose-Einstein condensate of bright excitons (polaritons)

Cited by in corpus (6)

• Incoherent excitation and switching of spin states in exciton-polariton condensates
• Spin-noise-based magnetometry of an $n$-doped GaAs microcavity in the field of elliptically polarized light
• Magnetic control of polariton spin transport
• Spin fluctuations of non-equilibrium electrons and excitons in semiconductors
• A driven-dissipative spin chain model based on exciton-polariton condensates
• Azimuthons and pattern formation in annularly confined exciton-polariton Bose-Einstein condensates