A master equation for high intensity lasers

Oscar Javier Gomez Sanchez, Hanz Y. Ramírez

In this work, dissipative effects from a phonon bath on the resonance fluorescence of a solid-state two-level system embedded in a high-quality semiconductor microcavity and driven by an intense laser are investigated. Within the density operator formalism, we derive a variational master equation valid for broader ranges of temperatures, pumping rates, and radiation-matter couplings than previous studies. From the obtained master equation, fluorescence spectra for various thermal and exciting conditions are numerically calculated and compared to those computed from weak coupling and polaronic master equations, respectively. Our results evidence the breakdown of those rougher approaches under increased temperature and strong pumping.

Paul Mandel

J. A. Fleck

The steady-state intensity distribution for a laser operating somewhat above threshold is determined by solving a master equation. The master equation describes the interaction between a single radiation mode and $N$ two-level atoms, it contains the effects of pumping and radiation loss from the cavity, and it is applicable to both homogeneous and Doppler broadening. Forms of the master equation applicable to both three- and four-level lasers are considered. Solutions are obtained under the assumption that the distribution of atoms and radiation intensity is a bivariate Gaussian. Fluctuations in the output of giant-pulse lasers are also considered.

Paul Mandel

In F

The resonance fluorescence of an atom in an intense laser field was investigated via dressed atom approach. The steady st te solution of the master ,equation was obtained, in which the damping of the photon in laser mode was compensated by introducing a exciting term in the master equation. The shape and intensity of the resonance fluoresoenoe was given. Some physios means was discussed.