The superradiance effect and dissipative instability in an inverted two-level medium
Abstract
By using a quasi-classical approximation, it is shown that the Dicke superradiance effect is a result of a dissipative wave instability in an inverted two-level medium. The instability is associated with the presence of negative-energy polarization waves and results from losses due to electromagnetic radiation through the specimen boundaries. Superabsorption, an effect similar to superradiance resulting from a dissipative instability associated with bulk ohmic losses, is also discussed. An analysis is carried out for a homogeneous infinite medium, for a one-dimensional model of a bounded medium, and for a three-dimensional specimen in the form of a sphere.
- Publication:
-
Zhurnal Eksperimentalnoi i Teoreticheskoi Fiziki
- Pub Date:
- November 1984
- Bibcode:
- 1984ZhETF..87.1565Z
- Keywords:
-
- Electromagnetic Radiation;
- Ohmic Dissipation;
- Polarization (Waves);
- Wave Dispersion;
- Molecular Relaxation;
- Plane Waves;
- Polarized Radiation;
- Propagation Modes;
- Atomic and Molecular Physics