Bloch-oscillations of exciton-polaritons and photons for the generation of an alternating terahertz spin current

Abstract

We analyze theoretically the spin dynamics of exciton-polaritons and photons during their Bloch oscillations in a one-dimensional microwire. The wire geometry induces an energy splitting between the longitudinal and transverse electric polarized eigenmodes. We show analytically that a synchronized regime between the Bloch oscillations in space and the precession of the pseudospin can be achieved. This synchronization results in the formation of a THz alternating spin current which can be extracted out of the confinement region by the Landau-Zener tunneling towards the second allowed miniband. Finally we show how the spin signal can be maintained despite of the lifetime of the particles for the case of exciton-polaritons both in a resonant and non resonant pumping schemes. The structure therefore acts as a Spin-optronic device able to convert the polarization and emit spin polarized pulses.

9 Pages, 6 Figures, submitted to Phys. Rev. B

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Cited by in corpus (8)

• Propagation and amplification dynamics of 1D polariton condensates
• An exciton-polariton mediated all-optical router
• Ballistic spin transport in exciton gases
• Nonlinear Bloch-waves and current states of exciton-polariton condensates
• Multivalley engineering in semiconductor microcavities
• Bloch-Landau-Zener oscillations in a quasi-periodic potential
• Bloch Oscillations of Hybrid Light-Matter Particles in a Waveguide Array
• Chaotic Bloch oscillations in dissipative optical systems driven by a periodic train of coherent pulses