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Study of phonon modes in germanium nanowires
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10.1063/1.2752134
/content/aip/journal/jap/102/1/10.1063/1.2752134
http://aip.metastore.ingenta.com/content/aip/journal/jap/102/1/10.1063/1.2752134
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

A SEM image of the as-synthesized GeNW sample.

Image of FIG. 2.
FIG. 2.

(Color online) (a) Raman spectra of three GeNW samples (, 10, ) and bulk Ge measured at laser power with wavelength. (b) Raman spectra of three GeNW samples (, 10, ) and bulk Ge measured at laser power with wavelength.

Image of FIG. 3.
FIG. 3.

(Color online) (a) Comparison of Raman spectra of GeNW sample 3 measured at with 514.532 and excitation wavelengths. (b) Comparison of Raman spectra of GeNW sample 3 measured at with excitation wavelength and with excitation wavelength.

Image of FIG. 4.
FIG. 4.

(Color online) (a) Raman Stokes peak of bulk Ge with different excitation powers; (b) Raman Stokes peak of GeNWs with different excitation powers; (c) Raman Stokes peak of GeNWs with different excitation powers.

Image of FIG. 5.
FIG. 5.

(Color online) (a) Raman peak shift of GeNW samples with different excitation powers; (b) Raman peak FWHM of GeNW samples with different excitation powers.

Image of FIG. 6.
FIG. 6.

(Color online) Raman peak ratio as a function of excitation laser power for three GeNW samples (, 10, ) and bulk Ge measured at wavelength.

Image of FIG. 7.
FIG. 7.

(Color online) (a) Comparison of Raman shift measured from three GeNW samples (, 10, ) and bulk Ge to calculation result from the RCF model. (b) Comparison of Raman peak FWHM measured from three GeNW samples (, 10, ) and bulk Ge to calculation result from the RCF model.

Image of FIG. 8.
FIG. 8.

Dots: Raman spectra of GeNWs measured at from (a) sample 3 and (b) sample 2 . Solid line: Fit to the measured spectra using the RCF model adapted for GeNWs. Extracted diameter distributions are (a) and (b) .

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/content/aip/journal/jap/102/1/10.1063/1.2752134
2007-07-06
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Study of phonon modes in germanium nanowires
http://aip.metastore.ingenta.com/content/aip/journal/jap/102/1/10.1063/1.2752134
10.1063/1.2752134
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