Title :
Dynamics of optical nonlinearities in CdSe/ZnS nanocrystals
Author :
Kyhm, J.H. ; Kyhm, J.H. ; Kim, S.M. ; Yang, H.S. ; Masumoto, Y.
Author_Institution :
Sch. of Phys., Pusan Nat. Univ., Busan
Abstract :
We performed time-resolved luminescence and polarization-resolved pump-probe experiments in CdSe/ZnS nanocrystals (NCs) under low and high excitations at room temperatures. At high excitations, the PL spectra shows a red shift (0.54 meV) and two-step decay. In pump-probe experiments, we observed very fast spin-flip process (~1 ps) and population oscillation, which is attributed to the Rabi oscillation.
Keywords :
II-VI semiconductors; cadmium compounds; nanostructured materials; nonlinear optics; photoluminescence; red shift; time resolved spectra; wide band gap semiconductors; zinc compounds; CdSe-ZnS; Rabi oscillation; electron volt energy 0.54 meV; nanocrystals; optical nonlinearities; photoluminescence spectra; polarization-resolved pump-probe experiments; population oscillation; red shift; spin-flip process; time-resolved luminescence; two-step decay; Laser excitation; Luminescence; Nanocrystals; Nonlinear optical devices; Nonlinear optics; Optical pumping; Photonic band gap; Physics; Stimulated emission; Zinc compounds;
Conference_Titel :
Lasers and Electro-Optics - Pacific Rim, 2007. CLEO/Pacific Rim 2007. Conference on
Conference_Location :
Seoul
Print_ISBN :
978-1-4244-1173-3
Electronic_ISBN :
978-1-4244-1174-0
DOI :
10.1109/CLEOPR.2007.4391768
