Observation of quantum confinement and quantum size effects
β Scribed by Diebold, A. C. ;Price, J.
- Publisher
- John Wiley and Sons
- Year
- 2008
- Tongue
- English
- Weight
- 365 KB
- Volume
- 205
- Category
- Article
- ISSN
- 0031-8965
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β¦ Synopsis
Abstract
Recently, the change in optical properties of ultraβthin silicon on insulator films was shown to be due to quantum confinement. The E~1~ critical point shifted to higher energies with a 1/L^2^ dependence, and the shift was observed room temperature. Yet, quantum confinement effects in thin metal have yet to be observed optically. This leads to a number of questions that we raise and for which we provide preliminary answers. Shifts less than kT in energy can be observed optically when the final state is spatially and temporally localized. (Β© 2008 WILEYβVCH Verlag GmbH & Co. KGaA, Weinheim)
π SIMILAR VOLUMES
We present Raman-scattering results for CdTe nanocrystals in doped glasses which clearly show the confinement effects on the phonon spectra as a function of the quantum-dot size. We observed optical phonon modes, surface phonons and some of their overtone combinations. We show that the surface-phono