Dynamics of two-photon paired superradiance

Understand

We develop for dipole-forbidden transition a dynamical theory of two-photon paired superradiance, or PSR for short.

• This is a cooperative process characterized by two photons back to back emitted with equal energies.
• By irradiation of trigger laser from two target ends, with its frequency tuned at the half energy between two levels, a macroscopically coherent state of medium and fields dynamically emerges as time evolves and large signal of amplified output occurs with a time delay.
• The basic semi-classical equations in 1+1 spacetime dimensions are derived for the field plus medium system to describe the spacetime evolution of the entire system, and numerically solved to demonstrate existence of both explosive and weak PSR phenomena in the presence of relaxation terms.