Dual amplified spontaneous emission as evidence for superexciplex from the dye LD473

Pulsed laser excitation of certain laser dye solutions prepares the sample molecules in a condition, unavailable under steady state lamp excitation. Excited molecules in large concentration obtainable under intense pulse laser pumping appear to undergo superexciplex interaction in which two excited molecules form an association with a solvent molecule acting as a link. This paper shows some of the important features of such superexciplexes with LD473 dye molecule as a reference.