Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 47, 2017
Previous Article Next Article

Amplification or cancellation of Fano resonance and quantum confinement induced asymmetries in Raman line-shapes

Author affiliations

Abstract

Fano resonance is reported here to be playing a dual role by amplifying or compensating for the quantum confinement effect induced asymmetry in Raman line-shape in silicon (Si) nanowires (NWs) obtained from heavily doped n- and p-type Si wafers respectively. The compensatory nature results in a near symmetric Raman line-shape from heavily doped p-type Si nanowires (NWs) as both the components almost cancel each other. On the other hand, the expected asymmetry, rather with enhancement, has been observed from heavily doped n-type SiNWs. Such a system (p- & n-) dependent Raman line-shape study has been carried out by theoretical line-shape analysis followed by experimental validation through suitably designed experiments. A dual role of Fano resonance in n- and p-type nano systems has been observed to modulate Raman spectra differently and reconcile accordingly to enhance and cease the Raman spectral asymmetry respectively. The present analysis will enable one to be more careful while analyzing a symmetric Raman line-shape from semiconductor nanostructures.

Graphical abstract: Amplification or cancellation of Fano resonance and quantum confinement induced asymmetries in Raman line-shapes

Back to tab navigation

Supplementary files

Article information


Submitted
18 Jul 2017
Accepted
13 Nov 2017
First published
13 Nov 2017

Phys. Chem. Chem. Phys., 2017,19, 31788-31795
Article type
Paper

Amplification or cancellation of Fano resonance and quantum confinement induced asymmetries in Raman line-shapes

S. K. Saxena, P. Yogi, S. Mishra, H. M. Rai, V. Mishra, M. K. Warshi, S. Roy, P. Mondal, P. R. Sagdeo and R. Kumar, Phys. Chem. Chem. Phys., 2017, 19, 31788
DOI: 10.1039/C7CP04836J

Social activity

Search articles by author

Spotlight

Advertisements