Optical two-colour superfluorescence in biphenyl crystal with pyrene: the influence of crystal symmetry

Abstract

The influence of crystal symmetry on the polarization properties of two-colour optical superfluorescence in biphenyl crystal with pyrene is investigated both theoretically and experimentally. It is shown that polarization of superfluorescence signal is determined by the asymmetry between absorbtion and emission spectra of pyrene molecules in biphenyl, which results in polarization decoupling of pumping and superfluorescence pulses.

Superradiance by ferroelectrics in cavity resonators

“…In order to define the locally-equilibrium (quasi-equilibrium) values (7), it is necessary to consider a Hamiltonian without the resonator feedback field,…”

“…It is known that an ensemble of atoms or molecules can emit superradiant electromagnetic pulses due to atomic interactions through the common radiation field [1][2][3][4][5][6][7][8][9][10][11]. This type of coherent emission, where the process starts with spontaneous atomic radiation, was first described by Dicke [12] and is often called Dicke superradiance [13].…”