Characteristic properties of ZnO random laser pumped by nanosecond pulses

Random lasing in nanocrystalline ZnO powders

“…The onset of lasing is evidenced typically by a threshold-like behavior of the luminescence. But narrow emission lines, typical for conventional lasers, are observed in random lasers only under certain conditions [7].…”

Investigation of acoustic response of the active gain medium with nanoparticles in the lasing process

“…Fig. 4 shows typical spectrum of spontaneous luminescence (1) and lasing (2), obtained in solutions with nanoparticles. The pumping threshold energy of solution was determined from the obtained in the course of theexperiment the emission spectrum and then dependences of the luminescence intensity from the pump energy were plot (Fig.…”

“…In recent years there has been an increased interest in the problem of lasing in dispersion gain medium, such as nanopowders, liquid gain mediums and film doped with nanoparticles [1][2][3][4][5][6]. This attention is due to the experimentally recorded fact of the reduction of the lasing energy threshold by using active media with nanoparticles [1,4,5,7].…”

“…Typical spectrums of spontaneous luminescence (1) and lasing(2) in solutions of R6G with nanoparticles.…”

Laser ablation synthesis and optical characterization of zinc oxide nanostructures

“…[6][7][8][9]. Recently room temperature UV lasing from ZnO films under nanosecond pumping has been reported [10]. Due to some advantages of ZnO nanowire lasers such as the lower threshold of lasing and enhanced radiative efficiency photoluminescence properties ZnO nanostructures have been extensively studied [11,12].…”