Quantum confinement of quasi-two-dimensional E{sub 1} excitons in Ge nanocrystals studied by resonant Raman scattering
Journal Article
·
· Physical Review. B, Condensed Matter and Materials Physics
- Department of Physics, University of California, Berkeley, California (United States)
- Materials Science and Technology Division, Naval Research Laboratory, Washington DC 20375 (United States)
Ge nanocrystals of diameters ranging from 4 to 10 nm were synthesized by ion implantation of Ge{sup +} ions into SiO{sub 2} films followed by annealing. Confinement of its optical phonon and of the quasi-two-dimensional E{sub 1} exciton have been observed at room temperature by resonant Raman scattering. The observed size-dependent blueshifts of the E{sub 1} excitons energy (which can be larger than 0.7 eV) are found to be in good agreement with a theoretical calculation based on the effective mass approximation. (c) 2000 The American Physical Society.
- OSTI ID:
- 20217112
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 3 Vol. 62; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
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