Abstract

Dicke’s superradiance from a gas system of atoms and molecules is described in terms of a two-level system, i.e., as an aggregate of half-spin operators. In this system, the magnitude of the total spin which is called a cooperation number, is conserved at the maximum for whole the radiative process. Here arises a question whether the superradiance is possible from Frenkel excitons in the crystal, in which excitations can propagate from atom to atom. If possible, how different the superradiance of the Frenkel excitons are from that of the dilute gas system? We will answer these questions in this talk.

© 1992 IQEC