Physical manifestation of extreme events in random lasers

摘要: We report our studies on exponentially-tempered Levy sums that explain coherent random lasers based nonresonant feedback. investigate the hierarchy in and identify contribution of extremes over a wide range excitation energies disorder strengths. Subsequently, we carry out experiments which physical manifestation these is revealed. At appropriate gain disorder, manifest as sharp ultranarrow modes spectrum. stronger peaks disappear due to reduced rarity extremes, compounded by decreased magnitude effected tempering.