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Bestimmung der in die klassische Theorie der stimulierten S TOKES ‐Erzeugung eingehenden Kopplungsparameter für Molekülkristalle
Author(s) -
Welsch D.
Publication year - 1972
Publication title -
annalen der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.009
H-Index - 68
eISSN - 1521-3889
pISSN - 0003-3804
DOI - 10.1002/andp.19724830209
Subject(s) - physics , adiabatic process , exciton , coupling constant , nonlinear system , phonon , polariton , scattering , quantum mechanics , photon , equations of motion , condensed matter physics
By using the mechanical exitations (excitons and phonons) of a molecular crystal the nonlinear H AMILTON ian for the quantum theoretic treatment of stimulated S TOKES scattering (polariton scattering) is calculated. For this purpose a special kind of adiabatic approximation described in an earlier work is used. In the H EISENBERG picture the equations of motion for photons, phonons, and excitons are derived. The field equations used in the classical theory for description of stimulated S TOKES generation are deduced semi‐classically by elimination of the exciton operators in the equations of motion. At last the general microscopic structure of the nonlinear coupling constants used in the classical theory is given.