Title :
Ultrafast electron dynamics in germanium nanoparticles
Author :
Stagira, S. ; Nisoli, Mauro ; De Silvestri, S. ; Stella, Angiolino ; Tognini, P. ; Cheyssac, P. ; Kofman, R.
Author_Institution :
Dipt. di Fisica, Politecnico di Milano, Italy
Abstract :
Summary form only given. We report on a detailed analysis of the ultrafast electron relaxation in Ge nanoparticles. The experiments have been performed on Ge nanocrystals with radii in the range 4-16 nm embedded in a dielectric material. Transient measurements were performed by pump-probe technique. The differential transmission spectra of nanoparticles at three pump energies are shown. The experimental results are described using a model based on Ge bulk band structure.
Keywords :
conduction bands; electron relaxation time; elemental semiconductors; energy gap; germanium; nanostructured materials; semiconductor quantum dots; time resolved spectra; 4 to 16 nm; Ge; band gap renormalization; bleaching band; bulk band structure; conduction bands; dielectric material embedded; differential transmission spectra; nanocrystals; nanoparticles; pump-probe technique; transient measurements; ultrafast electron dynamics; ultrafast electron relaxation; Atom lasers; Electrons; Frequency; Germanium; Nanoparticles; Nanostructures; Plasmons; Shape; Surface emitting lasers; Ultrafast optics;
Conference_Titel :
Quantum Electronics Conference, 2000. Conference Digest. 2000 International
Conference_Location :
Nice, France
Print_ISBN :
0-7803-6318-3
DOI :
10.1109/IQEC.2000.908119
