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Dispersion relation of phonon polaritons in GaP. Red curves are the uncoupled phonon and photon dispersion relations, black curves are the result of coupling (from top to bottom: upper polariton, LO phonon, lower polariton).
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In physics, polaritons/pəˈlærɪtɒnz,poʊ-/[1] are quasiparticles resulting from strong coupling of electromagnetic waves with an electric or magnetic dipole-carrying excitation.[example needed] 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. The polariton is a bosonic quasiparticle, and should not be confused with the polaron (a fermionic quasiparticle), which is an electron plus an attached phonon cloud.
Whenever the polariton picture is valid (i.e., when the weak coupling limit is an invalid approximation), the model of photons propagating freely in crystals is insufficient. A major feature of polaritons is a strong dependency of the propagation speed of light through the crystal on the frequency of the photon. For exciton-polaritons, a wealth of experimental results on various aspects have been gained in the case of copper(I) oxide.
^"Polariton". Lexico UK English Dictionary. Oxford University Press. Archived from the original on 2021-01-17.
In physics, polaritons /pəˈlærɪtɒnz, poʊ-/ are quasiparticles resulting from strong coupling of electromagnetic waves with an electric or magnetic dipole-carrying...
In condensed matter physics, a phonon polariton is a type of quasiparticle that can form in a diatomic ionic crystal due to coupling of transverse optical...
A polariton laser is a novel type of laser source that exploits the coherent nature of Bose condensates of exciton-polaritons in semiconductors to achieve...
Surface magnon-polaritons (SMPs) are a type of quasiparticle in condensed matter physics. They arise from the coupling of incident electromagnetic (EM)...
Polariton superfluid is predicted to be a state of the exciton-polaritons system that combines the characteristics of lasers with those of excellent electrical...
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mixed-state photons. This mixing is referred to as an intersubband cavity-polariton. These transitions exhibit an anticrossing in energy with a separation...
electrons excited by photons can be described by the quasi-particle named "polariton". A number of methods exist to describe these, both using classical and...
associated electromagnetic field, is called either a surface plasmon polariton at a planar interface, or a localized surface plasmon for the closed surface...
lattice vibrational waves known as phonon-polaritons, rather than currents or photons. Since phonon-polaritons propagate with frequencies in the range of...
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couple with a photon to create another quasiparticle called a plasmon polariton. The field of study and manipulation of plasmons is called plasmonics...
image the vibrational normal modes of single molecules. Surface plasmon polariton enhanced Raman scattering (SPPERS) – This approach exploits apertureless...
developed to detect various important biomarkers. The surface plasmon polariton is a non-radiative electromagnetic surface wave that propagates in a direction...
refraction. It may also be termed a polariton, especially near a resonance of the material. For example, an exciton-polariton is a superposition of an exciton...
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of polaritons in a trap. David Snoke and theoretical physicist Jonathan Keeling recently published an article announcing a new era for polariton condensates...
center of the disk. In a spinor field such as for example photonic or polariton fluids the skyrmion topology corresponds to a full Poincaré beam (a spin...
Plate, regarding angular momentum and light Surface plasmon polariton, a type of polariton from strong coupling of plasmons to electromagnetic waves Science...
bound pair in an optical lattice. The JCH Hamiltonian also supports two-polariton bound states when the photon-atom interaction is sufficiently strong....
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