Effect of gap modes on graphene and multilayer graphene in tip-enhanced Raman spectroscopy
Article first published online: 25 OCT 2012
Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
physica status solidi (b)
Volume 249, Issue 12, pages 2511–2514, December 2012
How to Cite
Poliani, E., Nippert, F. and Maultzsch, J. (2012), Effect of gap modes on graphene and multilayer graphene in tip-enhanced Raman spectroscopy. Phys. Status Solidi B, 249: 2511–2514. doi: 10.1002/pssb.201200155
- Issue published online: 4 DEC 2012
- Article first published online: 25 OCT 2012
- Manuscript Accepted: 20 SEP 2012
- Manuscript Revised: 31 AUG 2012
- Manuscript Received: 9 MAY 2012
- gap modes;
The experimental system formed by an electrochemically etched Au tip and an Au substrate is studied in a tip-enhanced Raman spectroscopy (TERS) setup with side illumination. A resonant optical cavity is created allowing the interaction between localized surface plasmons (LSPs) from the tip and surface plasmon polaritons (SPPs) from the substrate, the so called ‘gap modes’. We investigate the interaction between multilayer graphene and gap modes as well as localized emission of defects and inner unknown molecules enhanced by this coupling. The effect of this intense localized electromagnetic field is also studied on monolayer graphene deposited on SiO2.
Graphical representation of TERS on graphene.