Influence of the buffer layer properties on the intensity of Raman scattering of graphene
2013 (English)In: Journal of Raman Spectroscopy, ISSN 0377-0486, E-ISSN 1097-4555, Vol. 44, no 6, 803-809 p.Article in journal (Refereed) Published
Using a model of oscillating dipoles, we simulate the intensity of the G-band in the Raman signal from structures consisting of graphene, separated by an arbitrary buffer layer from a substrate. It is found that a structure with an optimized buffer layer refractive index and thickness exhibits a Raman signal which is nearly 50 times more intense than that from the same structure with a non-optimized buffer layer. The theoretical simulations are verified by Raman measurements on structures consisting of a layer of graphene on SiO2 and Al2O3 buffer layers. The optical contrast of the single graphene layer is calculated for an arbitrary buffer layer. It was found that both the Raman intensity and optical contrast can be maximized by varying the buffer layer thickness.
Place, publisher, year, edition, pages
2013. Vol. 44, no 6, 803-809 p.
graphene, Raman spectra, enhancement of Raman intensity, transfer matrix method, oscillating dipoles
Composite Science and Engineering Atom and Molecular Physics and Optics
IdentifiersURN: urn:nbn:se:kth:diva-125615DOI: 10.1002/jrs.4294ISI: 000319935700003OAI: oai:DiVA.org:kth-125615DiVA: diva2:640259
QC 201308132013-08-132013-08-132013-08-13Bibliographically approved