Ultrashort multiple-quantum-well lasers with extremely broad spectrum: towards femtosecond superradiant lasing

Summary form only given. The challenge to obtain pulsed superradiant regime in semiconductor structures stems from the fact that mode superradiance provides the highest possible rate of stimulated radiative transitions and gives rise to generation of ultrashort powerful pulses. However, to achieve collective spontaneous recombination of free electrons and holes one has to overcome collisions that destroy the phased dipole oscillations of electron-hole pairs. We present theoretical and experimental analysis of single- and multi-mode generation in lasers specifically designed and fabricated to meet the above requirements.