Propagation of radiation pulses through gas–plasma mixtures

Abstract

We determine the linear optical susceptibility of a radiation pulse propagating through a mixture of a gas of atoms or molecules and a plasma. For a specific range of radiation and plasma frequencies, resonant generation of volume plasmons significantly amplifies the radiation intensity. The conditions for resonant amplification are derived from the dispersion relations in the mixture, and the amplification is demonstrated in a numerical simulation of pulse propagation.

Temporal optical processes in a Rydberg gas

“…where μ z is the electric dipole moment of the atom in the field direction, assumed parallel to the z-axis. If we now consider propagation of photons with a generic frequency ω in a Rydberg gas, where static or oscillating electric fields have been applied, the optical response of the medium will be given by a dispersion relation of the form [29,30]…”