Title :
Femtosecond nonlinear spectroscopy of semiconductor quantum dots: effect of two-electron-hole-pair interaction
Author :
Hunsche, S. ; Klimov, V. ; Kurz, H.
Author_Institution :
Inst. fur Halbleitertechnik II, Tech. Hochschule Aachen, Germany
Abstract :
The authors report on measurements of the femtosecond dynamics of differential transmission spectra (DTS) of CdSe semiconductor nanocrystals excited well above the energy of the lowest optical transition. The effect of the two-pair interaction manifests itself at the initial stage of carrier relaxation, before the lowest electron and hole levels become occupied, as a red-shift of the lowest resonance in the nonlinear absorption spectra
Keywords :
III-V semiconductors; cadmium compounds; high-speed optical techniques; nanostructured materials; nonlinear optics; red shift; semiconductor quantum dots; visible spectra; visible spectroscopy; CdSe; carrier relaxation; differential transmission spectra; electron levels; femtosecond dynamics; femtosecond nonlinear spectroscopy; hole levels; nonlinear absorption spectra; optical transition; red-shift; semiconductor quantum dots; two-electron-hole-pair interaction; two-pair interaction; Absorption; Charge carrier processes; Electron optics; Energy measurement; Nanocrystals; Nonlinear optics; Quantum dots; Resonance; Spectroscopy; Ultrafast optics;
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.1994.470848
