Coherent spontaneous radiation of Frenkel excitons

Journal Article · Mon Feb 01 04:00:00 EST 1988 · Theor. Math. Phys.; (United States)

OSTI ID:6442068

Andrianov, S N; Samartsev, V V; Sheibut, Yu E

We have constructed a mathematical model that describes the coherent spontaneous radiation of a macroscopically filled exciton mode. We have demonstrated qualitatively ways in which a coherent subsystem of excitons can be formed. When this occurs under the influence of an external coherent source, exciton free induction occurs, while in the case of a spontaneous transition of the excitons to a coherent state through freezing of the reservoir of intermolecular interactions superradiance occurs. We have concluded that superradiance in the system of Frenkel excitons is possible under the influence of the non-Dicke mechanisms of self-induction of correlations, when the dipole transition moments of the individual atoms are coupled into a single macroscopic effective spin through their electrostatic interaction, this being analogous to the ordering of magnetic dipole moments in a ferromagnet.

• Research Organization: Physicotechnical Institute, Kazan (USSR)
• OSTI ID: 6442068
• Journal Information: Theor. Math. Phys.; (United States), Journal Name: Theor. Math. Phys.; (United States) Vol. 72:2; ISSN TMPHA
• Country of Publication: United States
• Language: English

Related Subjects

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71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COHERENT RADIATION
COUPLING CONSTANTS
CRYSTAL DEFECTS
CRYSTAL MODELS
CRYSTAL STRUCTURE
CRYSTALS
DE-EXCITATION
DIPOLE MOMENTS
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
EMISSION
ENERGY-LEVEL TRANSITIONS
EQUATIONS
EXCITATION
EXCITONS
FRENKEL DEFECTS
HAMILTONIANS
INTERACTIONS
KINETIC EQUATIONS
MAGNETIC DIPOLE MOMENTS
MAGNETIC MOMENTS
MASSLESS PARTICLES
MATHEMATICAL MODELS
MATHEMATICAL OPERATORS
MECHANICS
ORDER PARAMETERS
PARTICLE INTERACTIONS
PHOTON EMISSION
PHOTONS
POINT DEFECTS
QUANTUM MECHANICS
QUANTUM OPERATORS
QUASI PARTICLES
RADIATIONS
STATISTICAL MECHANICS
STIMULATED EMISSION
SUPERRADIANCE
VACANCIES