Induced superradiance in activated crystals

Aleksandr M Leontovich, A. M. Mozharovskiǐ, Evgenii Dmitrievich Trifonov

V. V. Eremenko, P. V. Zinoviev, Alexander Kazachkov +2 more

P. V. Zinov’ev, Nataliya B. Silaeva, Yu. E. Sheǐbut

Yu. V. Naboĭkin, S. N. Andrianov, P. V. Zinoviev +5 more

Abstract For the first time peculiarities of the formation of Dicke optical superradiance are studied experimentally and theoretically in a pyrene‐doped biphenyl crystal under active phonon effect (the energy level is 1Ag−1B2u; wavelength 373.93 nm; pyrene concentration 0.25 mol%; temperature 1.5 to 4.2 K). The possibilities of this phenomenon to obtain spectroscopic data are demonstrated. The pseudolocalized phonon lifetime τphon and the activation energy ΔE are estimated to ΔE = (7 ± 3) cm−1 and τphon = 2 to 20 ps by the temperature dependence of the superradiance intensity.

N. S. Ginzburg, E. R. Kocharovskaya, Alexander S. Sergeev

We show that a two-level active sample of one-dimensional photonic crystal can generate chaotic sequence of extremely short pulses in the absence of mirrors. Numerical analysis and optimization of this promising superradiant laser is presented.