Publication

Threshold behavior in the collision broadening of microcavity polaritons

Vincenzo Savona
1998
Journal Articles

Abstract

The problem of the density-dependent homogeneous broadening of microcavity polaritons due to exciton-exciton Coulomb interaction is addressed using the self-consistent Born approximation. The theoretical results predict that, for resonant pumping of the lower polariton, the dependence of its broadening on the density of excitations has a threshold behavior. Below the threshold density, scattering is strongly inhibited because it involves only the small region of k space where the polariton effective mass is very light. Above threshold, the region of k space with excitonlike dispersion becomes allowed, giving the dominant contribution to the collision broadening. [S0163-1829(98)52740-3].

Official source

https://infoscience.epfl.ch/entities/publication/a9ba1049-70ca-42ec-85d3-09e1aa850c06

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Vincenzo Savona
1998
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/a9ba1049-70ca-42ec-85d3-09e1aa850c06

About this result

Related concepts (23)

Exciton-polariton

In physics the Exciton–polariton is a type of polariton; a hybrid light and matter quasiparticle arising from the strong coupling of the electromagnetic dipolar oscillations of excitons (either in bulk or quantum wells) and photons. Because light excitations are observed classically as photons, which are massless particles, they do not therefore have mass, like a physical particle. This property makes them a quasiparticle.

Polariton

In physics, polaritons pəˈlærᵻtɒnz,_poʊ- are quasiparticles resulting from strong coupling of electromagnetic waves with an electric or magnetic dipole-carrying excitation. They are an expression of the common quantum phenomenon known as level repulsion, also known as the avoided crossing principle. Polaritons describe the crossing of the dispersion of light with any interacting resonance. To this extent polaritons can also be thought of as the new normal modes of a given material or structure arising from the strong coupling of the bare modes, which are the photon and the dipolar oscillation.

Surface plasmon polariton

Surface plasmon polaritons (SPPs) are electromagnetic waves that travel along a metal–dielectric or metal–air interface, practically in the infrared or visible-frequency. The term "surface plasmon polariton" explains that the wave involves both charge motion in the metal ("surface plasmon") and electromagnetic waves in the air or dielectric ("polariton"). They are a type of surface wave, guided along the interface in much the same way that light can be guided by an optical fiber.