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Low-frequency Raman scattering from Si/Ge nanocrystals in different matrixes caused by acoustic phonon quantization
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10.1063/1.4747933
/content/aip/journal/jap/112/5/10.1063/1.4747933
http://aip.metastore.ingenta.com/content/aip/journal/jap/112/5/10.1063/1.4747933

Figures

Image of FIG. 1.
FIG. 1.

Low-frequency Raman spectra of Si/Ge nanoparticles embedded in SiO/GeO matrix: (a) Ge/SiO, (b) Ge/GeO, and (c) Si/SiO. Full curve: total fitted spectrum and dashed curves: individual fitted peaks. The spectra obtained with an unpolarized 532 nm wavelength laser line.

Image of FIG. 2.
FIG. 2.

Acoustic mode frequencies for SiO/GeO embedded Si/Ge nanoparticles 1/R; along with other experimental data: (a) Si and (b) Ge.

Image of FIG. 3.
FIG. 3.

Low-frequency spectra calculated using the CSM for Si/Ge nanoparticle embedded in SiO/GeO: (a)  = 0 mode for Si/SiO and Ge/SiO. (b) = 0 mode for Ge/SiO and Ge/GeO.

Image of FIG. 4.
FIG. 4.

Dependence of the FWHM on 1/R of the  = 0,  = 0 spheroidal phonon mode and  = 2,  = 0 Raman data along with other experimental data.

Image of FIG. 5.
FIG. 5.

Optical Raman spectra for Si/SiO, Ge/SiO and Ge/GeO.

Tables

Generic image for table
Table I.

Eigen frequencies of spheroidal modes in (cm−1) of Si/SiO, Ge/SiO, and Ge/GeO of different sizes, respectively.

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Table II.

Comparison of frequency ratio ( / ) is the frequency of the  = 2,  = 0; SPH mode.

Generic image for table
Table III.

Comparison ratio of intensity ratio of Si/SiO, Ge/SiO, and Ge/GeO.

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/content/aip/journal/jap/112/5/10.1063/1.4747933
2012-09-10
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Low-frequency Raman scattering from Si/Ge nanocrystals in different matrixes caused by acoustic phonon quantization
http://aip.metastore.ingenta.com/content/aip/journal/jap/112/5/10.1063/1.4747933
10.1063/1.4747933
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