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Exciton Nonequilibrium Steady States in Laser‐Excited Molecular Crystals
Author(s) -
An Nguyen Ba
Publication year - 1988
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221500277
Subject(s) - bistability , exciton , non equilibrium thermodynamics , excited state , physics , optical bistability , excitation , polariton , laser , boson , condensed matter physics , quantum mechanics , nonlinear optics
Nonequilibrium steady states of excitons in laser‐excited three‐dimensional molecular crystals are investigated not resorting to the usual boson description but using the exact trilinear commutation relations for exciton operators. The nonequilibrium property, non‐bosonity, and optical nonlinearity of the many‐exciton system under the action of an external classical laser field are considered on the same footing. Eigenfrequencies and dampings of the giant polariton are found to be dependent on the excitation degree. Conditions are determined for two types of bistability: density–light and light–light bistability.