Study of Phonon Modes in Germanium Nanowires

Details Study of Phonon Modes in Germanium Nanowires Study of Phonon Modes in Germanium Nanowires

2007-02-25

arxiv.org/abs/quant-ph/0702226v1

Physics

Quantum Physics

11 pages,15 figures

Scientific paper

10.1063/1.2752134

The observation of pure phonon confinement effect in germanium nanowires is limited due to the illumination sensitivity of Raman spectra. In this paper we measured Raman spectra for different size germanium nanowires with different excitation laser powers and wavelengths. By eliminating the local heating effect, the phonon confinement effect for small size nanowires was clearly identified. We have also fitted the Raman feature changes to estimate the size distribution of nanowires for the first time.

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