Universität zu Köln

Pfeiffer, Markus, Senkovskiy, Boris V., Haberer, Danny, Fischer, Felix R., Yang, Fan, Meerholz, Klaus, Ando, Yoichi ORCID: 0000-0002-3553-3355, Grueneis, Alexander and Lindfors, Klas ORCID: 0000-0002-6482-5605 (2018). Enhanced light-matter interaction of aligned armchair graphene nanoribbons using arrays of plasmonic nanoantennas. 2D Mater., 5 (4). BRISTOL: IOP PUBLISHING LTD. ISSN 2053-1583

Full text not available from this repository.

Abstract

We couple photoluminescent semiconducting 7-atom wide armchair edge graphene nanoribbons to plasmonic nanoantenna arrays and demonstrate an enhancement of the photoluminescence and Raman scattering intensity of the nanoribbons by more than an order of magnitude averaged over large areas, and by three orders of magnitude in the hot spots of plasmonic antennas. The increase in signal allows us to study Raman spectra with high signal-to-noise ratio. Using plasmonic enhancement we are able to detect the off-resonant Raman scattering from the modified radial breathing-like mode (RBLM) due to physisorbed molecules, the 3rd order RBLM, and C-H vibrations. We find excellent agreement between experimental data and simulations describing the spectral dependence of the enhancement and modifications of the polarization anisotropy. The strong field gradients in the optical near-field further allow us to probe the subwavelength coherence properties of the phonon modes in the nanoribbons. We theoretically model this considering a finite phonon correlation length along the GNR direction. Our results allow estimating the correlation length in graphene nanoribbons.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Pfeiffer, Markus UNSPECIFIED UNSPECIFIED UNSPECIFIED Senkovskiy, Boris V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Haberer, Danny UNSPECIFIED UNSPECIFIED UNSPECIFIED Fischer, Felix R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Yang, Fan UNSPECIFIED UNSPECIFIED UNSPECIFIED Meerholz, Klaus UNSPECIFIED UNSPECIFIED UNSPECIFIED Ando, Yoichi UNSPECIFIED orcid.org/0000-0002-3553-3355 UNSPECIFIED Grueneis, Alexander UNSPECIFIED UNSPECIFIED UNSPECIFIED Lindfors, Klas UNSPECIFIED orcid.org/0000-0002-6482-5605 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-170052
DOI:	10.1088/2053-1583/aacf2b
Journal or Publication Title:	2D Mater.
Volume:	5
Number:	4
Date:	2018
Publisher:	IOP PUBLISHING LTD
Place of Publication:	BRISTOL
ISSN:	2053-1583
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Chemistry > Institute of Physical Chemistry
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language ON-SURFACE SYNTHESIS; QUANTUM-DOT; FLUORESCENCE; MOLECULE; FIELD; FABRICATION; EXCITATION; SCATTERING; EMISSION; ANTENNAS Multiple languages Materials Science, Multidisciplinary Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/17005