Collective Superradiation Effects in InGaAsP/InP Liquid Phase Epitaxy-Grown Quasi-0-Dimentional Nanostructures

Abstract

Autocorrelation measurements of the time structure of radiation have been performed on a InGaAsP/InP laser based on self-organized nanostructures under CW pumping. The measurements reveal ultra-short-pulses shorter than the intra-cavity round-trip time in the structure of laser radiation. The first and second order analysis of optical autocorrelation functions prove the pulse nature of CW injection laser radiation. Two different modes of pulse formation has been shown.

Collective resonance and form factor of homogeneous broadening in semiconductors

“…Collective resonance of nonequilibrium carriers ͑super-radiance͒ was studied in InGaAsP/InP ͑ϭ1.3 m͒ lasers before by using optical autocorrelation technique. 6,7 Active regions of these lasers were formed by short-contact liquid phase epitaxy in InGaAsP/InP system, and remarkable nanostructure was caused by spinodal decomposition of the quaternary solid solution. Autocorrelation functions of first and second order demonstrated the presence of short pulses both below and above the lasing threshold.…”