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Exciton–polaritons in van der Waals heterostructures embedded in tunable microcavities
TLDR
The results pave the way for room-temperature polaritonic devices based on multiple-quantum-well van der Waals heterostructures, where polariton condensation and electrical polariton injection through the incorporation of graphene contacts may be realized.
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ZnO as a material mostly adapted for the realization of room-temperature polariton lasers
Wannier-Mott excitons in the wurzite-type semiconductor material ZnO are stable at room temperature, have an extremely large oscillator strength, and emit blue light. This makes ZnO an excellent…
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Spontaneous formation and optical manipulation of extended polariton condensates
Long-lived polariton condensates can propagate well beyond the area of their initial excitation while still maintaining spatial coherence. This enables direct and controllable manipulation of the…
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Experimental evidence for nonequilibrium Bose condensation of exciton polaritons
We observe dramatic changes in the near-field and far-field emission from a semiconductor microcavity excited by a pulsed and nonresonant optical pump with varying power. Above a threshold pumping…
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Direct observation of Dirac cones and a flatband in a honeycomb lattice for polaritons.
TLDR
Experimental studies of honeycomb lattices where the polariton low-energy dispersion is analogous to that of electrons in graphene, using energy-resolved photoluminescence to directly observe Dirac cones, around which the dynamics of polaritons is described by the Dirac equation for massless particles.
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Optical spin hall effect.
TLDR
A remarkable analogy is established between the well-known spin Hall effect and the polarization dependence of Rayleigh scattering of light in microcavities and spin polarizations of the polaritons scattered clockwise and anticlockwise have different signs.
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Macroscopic quantum self-trapping and Josephson oscillations of exciton polaritons
The Josephson effects that arise when two quantum states are coupled through a barrier are difficult to observe in optical systems because photon–photon interactions are so weak. Researchers have now…
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Polariton polarization-sensitive phenomena in planar semiconductor microcavities
From a theoretical point of view, we discuss a variety of phenomena linked to the spin and polarization degree of freedom of exciton-polaritons in semiconductor microcavities. We start with linear…
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From excitonic to photonic polariton condensate in a ZnO-based microcavity.
We report exciton-polariton condensation in a new family of fully hybrid ZnO-based microcavity demonstrating the best-quality ZnO material available (a bulk substrate), a large quality factor (~4000)…
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Interactions in confined polariton condensates.
TLDR
The shape of the condensate wave function is shown to be modified by repulsive interactions with the reservoir of uncondensed excitons, which results in the generation of optical traps in wire cavities.
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