Title :
Optical nonlinearities at the bandedge of amorphous selenium clusters
Author :
Mikhailov, V.P. ; Yumashev, K.V. ; Prokoshin, P.V. ; Jmako, S.P. ; Gurin, V.S. ; Artemyev, M.V.
Author_Institution :
Belarus State Univ., Minsk, Byelorussia
Abstract :
The search for new materials with a large nonlinear optical susceptibility and the simple synthesis of selenium clusters of various crystal structure has caused the investigation of nonlinear optical properties of nanometer-size selenium clusters. Samples of PVA films with a-Se clusters on quartz glass were investigated by picosecond pump-probe laser spectroscopy equipment with two photodiode matrices as detectors. Laser pulses with wavelength of 540 nm, duration of 15 ps and repetition frequency of 1 Hz served as pump beam. White continuum was used as probe beam
Keywords :
amorphous semiconductors; elemental semiconductors; energy gap; nanostructured materials; nonlinear optical susceptibility; nonlinear optics; selenium; visible spectra; 1 Hz; 15 ps; 540 nm; Se; a-Se clusters; bandedge; large nonlinear optical susceptibility; nanometer-sized clusters; optical nonlinearities; picosecond pump-probe laser spectroscopy; Amorphous materials; Crystalline materials; Laser beams; Laser excitation; Nonlinear optical devices; Nonlinear optics; Optical films; Optical materials; Optical pumping; Pump lasers;
Conference_Titel :
Nonlinear Optics: Materials, Fundamentals, and Applications, 1994. NLO '94 IEEE
Conference_Location :
Waikoloa, HI
Print_ISBN :
0-7803-1473-5
DOI :
10.1109/NLO.1994.470822
