A Room-temperature Spin-polarized Polariton Laser

Abstract

In the field of spin-controlled semiconductor lasers, massive effort has been focused upon materials with long spin relaxation times (~ns). In contrast, we demonstrate room-temperature spin-polarized ultrafast pulsed lasing in InGaAs quantum wells (~10 ps) embedded within a GaAs microcavity. The microcavity studied here is similar to vertical-cavity surface-emitting lasers (VCSEL) used in optical communication. Unlike a VCSEL, the present polariton laser has nonlinear output and energy shifts owing to the mixing of the free-carrier polarization and cavity light field. At room temperature, we observe features resembling those in exciton-polariton condensates at cryogenic temperatures, including the spontaneous build-up of spatial coherence, macroscopic occupation, and spin polarization. Our results should stimulate activities to exploit spin-orbit interaction and many-body effects for fundamental studies of quantum light-matter fluids and developments of spin-dependent optoelectronic devices.

References in corpus (16)

• Quantum fluids of light
• Quantised Vortices in an Exciton-Polariton Fluid
• Exciton-polariton condensates
• Polariton laser using single micropillar GaAs-GaAlAs semiconductor cavities
• Spontaneous Polarisation Build up in a Room Temperature Polariton Laser
• Spatial and spectral shape of inhomogeneous non-equilibrium exciton-polariton condensates
• Polaritonic Feshbach Resonance
• Ultrafast tristable spin memory of a coherent polariton gas
• BCS-BEC crossover in a system of microcavity polaritons
• Photon lasing in a GaAs microcavity: similarities with a polariton condensate
• The effects of spin-dependent interactions on polarisation of bright polariton solitons
• Analytical Model of Spin-Polarized Semiconductor Lasers
• Statistics of the polariton condensate
• Spontaneous symmetry breaking in a polariton and photon laser
• Fermi-Edge Superfluorescence from a Quantum-Degenerate Electron-Hole Gas
• The Fermi edge singularity of spin polarized electrons

Cited by in corpus (8)

• Ultrafast spin-lasers
• Optically controlling the emission chirality of microlasers
• Toward high-frequency operation of spin lasers
• Spin-Lasers: Spintronics Beyond Magnetoresistance
• Wurtzite spin lasers
• Effect of intravalley and intervalley electron-hole exchange on the nonlinear optical response of monolayer MoSe${}_2$
• Multiple-pulse lasing from an optically induced harmonic confinement in a highly photoexcited microcavity
• Transient dual-energy lasing in a semiconductor microcavity