Wavelength-dependent Raman scattering of hydrogenated amorphous silicon carbon with red, green, and blue light excitation

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Title: Wavelength-dependent Raman scattering of hydrogenated amorphous silicon carbon with red, green, and blue light excitation
Authors: Park, M.Sakhrani, V.Maria, J-P.Rodriguez, Brian J.et al.
Permanent link: http://hdl.handle.net/10197/5374
Date: Apr-2003
Online since: 2014-02-06T11:45:22Z
Abstract: This study presents results of wavelength-dependent Raman scattering from amorphous silicon carbon (a-Si:C:H). The a-Si:C:H films were produced by radio-frequency plasma-enhanced chemical vapor deposition. Prior results with amorphous carbon indicate that laser excitation selectively probes clusters with differing sizes. Our measurements with a-Si:C:H indicate that when using red (632.8 nm), green (514.5 nm), and blue (488.0 nm) excitation, the Raman D and G peaks shift to higher wave numbers as the excitation energy increases. The higher frequency is associated with smaller clusters that are preferentially excited with higher photon energy. It appears that photoluminescence occurs due to radiative recombination from intracluster transitions in Si-alloyed sp(2)-bonded carbon clusters.
Type of material: Journal Article
Publisher: Cambridge University Press
Journal: Journal of Materials Research
Volume: 18
Issue: 4
Start page: 768
End page: 771
Copyright (published version): 2003 Cambridge University Press
Keywords: Raman scatteringAmorphous silicon carbonPhotoluminescence
DOI: 10.1557/JMR.2003.0106
Language: en
Status of Item: Peer reviewed
Appears in Collections:Physics Research Collection

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