Title :
UV lasing in powdered ZnO excited by nanosecond pumping
Author :
Markushev, Valery M. ; Ryzhkov, Mikhail V. ; Briskina, Charus M. ; Cao, Hui ; Zadorozhnaya, Lyudmila A. ; Li, Lyudmila E. ; Gevargizov, Eugeniy I. ; Demianets, Lyudmila N.
Author_Institution :
Inst. of Radio Eng. & Electron., RAS, Moscow, Russia
Abstract :
Investigations of UV spectra of powders and disordered films of ZnO excited by nanosecond pumping were conducted. Spectra of spontaneous emission were registered at 300 and 77 K. With some of our powdered samples we achieved lasing at 300 K. The threshold values of pumping energy density occurred to be higher than that under picosecond pumping approximately up to two orders of magnitude. Peculiarities of different samples lasing are demonstrated and discussed.
Keywords :
high-speed optical techniques; optical films; optical pumping; powders; semiconductor lasers; spontaneous emission; ultraviolet spectra; wide band gap semiconductors; zinc compounds; 300 K; 77 K; UV emission; UV lasing; UV spectra; ZnO; disordered films; nanosecond pumping; picosecond pumping; powdered ZnO; powdered samples; powdered zinc oxide; pumping energy density threshold; random lasers; spontaneous emission spectra; Bandwidth; Conductive films; Excitons; Laser excitation; Physics; Powders; Pump lasers; Semiconductor lasers; Spontaneous emission; Zinc oxide;
Conference_Titel :
Advanced Optoelectronics and Lasers, 2005. Proceedings of CAOL 2005. Second International Conference on
Print_ISBN :
0-7803-9130-6
DOI :
10.1109/CAOL.2005.1553829
