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Related Experiment Videos

Optical spin hall effect.

Alexey Kavokin1, Guillaume Malpuech, Mikhail Glazov

  • 1Department of Physics and Astronomy, University of Southampton, SO17 1BJ Southampton, United Kingdom.

Physical Review Letters
|October 4, 2005
PubMed
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Researchers found an optical spin Hall effect in microcavities, analogous to the electronic spin Hall effect. This effect causes scattered exciton polaritons to become spin-polarized, with opposite signs for clockwise and anticlockwise scattering.

Area of Science:

  • Condensed Matter Physics
  • Quantum Optics
  • Photonics

Background:

  • The spin Hall effect is a well-established phenomenon in electronics.
  • Exciton polaritons are quasiparticles formed from the coupling of excitons and photons in semiconductor microcavities.
  • Understanding light-matter interactions in microcavities is crucial for developing novel optical devices.

Purpose of the Study:

  • To establish an analogy between the spin Hall effect and light polarization in microcavities.
  • To investigate the spin polarization of scattered exciton polaritons.
  • To explore the underlying mechanisms responsible for the observed optical spin Hall effect.

Main Methods:

  • Theoretical analysis of exciton polariton scattering in microcavities.

Related Experiment Videos

  • Investigation of polarization dependence in Rayleigh scattering.
  • Modeling the influence of spin effects, longitudinal-transverse splitting, and finite exciton polariton lifetime.

    • Main Results:

    • A direct analogy was established between the spin Hall effect and the polarization dependence of Rayleigh scattering.
    • Scattered exciton polaritons exhibit strong spin polarization dependent on the initial state's polarization and scattering direction.
    • Spin polarization of clockwise and anticlockwise scattered polaritons show opposite signs.

    Conclusions:

    • The optical spin Hall effect is demonstrated in microcavity systems.
    • Strong longitudinal-transverse splitting and finite exciton polariton lifetime are key factors enabling this effect.
    • This finding opens new avenues for controlling spin properties of light in photonic systems.