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

Journal Article · Thu Sep 15 04:00:00 EDT 2011 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PHYSREVB.84.125314· OSTI ID:21596878

Flayac, H; Solnyshkov, D D; Malpuech, G ^[1]

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1. LASMEA, Nanostructure and Nanophotonics Group, Clermont Universite and Universite Blaise Pascal, CNRS, 63177 Aubiere Cedex France (France)

We analyze theoretically the spin dynamics of exciton-polaritons and photons during their Bloch oscillations in a wire-shaped microcavity. The reduced system dimensionality induces a specific momentum-dependent energy splitting between the TE- and TM-polarized eigenmodes. As a consequence, the spin of the particles oscillates during their motion along the wire. We show that the periods of the Bloch oscillations and of the spin precession can become commensurate. Under such conditions, linearly polarized exciting pulses can be transformed in a THz alternating spin current. The structure acts as a spin-optronic device which converts the polarization and emits spin-polarized pulses. Finally, we propose two different schemes which allow us to maintain the intensity of the spin signal for much longer than the polariton lifetime.

• OSTI ID: 21596878
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 12 Vol. 84; ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANGULAR MOMENTUM
BOSONS
CURRENTS
ELEMENTARY PARTICLES
EMISSION
EQUIPMENT
FREQUENCY RANGE
LIFETIME
MASSLESS PARTICLES
ORIENTATION
OSCILLATIONS
PARTICLE PROPERTIES
PARTICLES
PHOTONS
POLARIZATION
POLARONS
PRECESSION
PULSES
QUASI PARTICLES
SIGNALS
SIMULATION
SPIN
SPIN ORIENTATION
THZ RANGE
WIRES