Optical nanoantennas for multiband surface-enhanced infrared and raman spectroscopy
Huck, Christian W.
Maragó, Onofrio M.
Di Fabrizio, Enzo M.
Lamy De La Chapelle, Marc L.
Gucciardi, Pietro Giuseppe
KAUST DepartmentBiological and Environmental Sciences and Engineering (BESE) Division
Material Science and Engineering Program
Physical Science and Engineering (PSE) Division
Online Publication Date2013-04-03
Print Publication Date2013-04-23
Permanent link to this recordhttp://hdl.handle.net/10754/562724
MetadataShow full item record
AbstractIn this article we show that linear nanoantennas can be used as shared substrates for surface-enhanced Raman and infrared spectroscopy (SERS and SEIRS, respectively). This is done by engineering the plasmonic properties of the nanoantennas, so to make them resonant in both the visible (transversal resonance) and the infrared (longitudinal resonance), and by rotating the excitation field polarization to selectively take advantage of each resonance and achieve SERS and SEIRS on the same nanoantennas. As a proof of concept, we have fabricated gold nanoantennas by electron beam lithography on calcium difluoride (1-2 μm long, 60 nm wide, 60 nm high) that exhibit a transverse plasmonic resonance in the visible (640 nm) and a particularly strong longitudinal dipolar resonance in the infrared (tunable in the 1280-3100 cm -1 energy range as a function of the length). SERS and SEIRS detection of methylene blue molecules adsorbed on the nanoantenna's surface is accomplished, with signal enhancement factors of 5 × 102 for SERS (electromagnetic enhancement) and up to 105 for SEIRS. Notably, we find that the field enhancement provided by the transverse resonance is sufficient to achieve SERS from single nanoantennas. Furthermore, we show that by properly tuning the nanoantenna length the signals of a multitude of vibrational modes can be enhanced with SEIRS. This simple concept of plasmonic nanosensor is highly suitable for integration on lab-on-a-chip schemes for label-free chemical and biomolecular identification with optimized performances. © 2013 American Chemical Society.
SponsorsWe acknowledge support from the European Union Seventh Framework Programme (FP7/2007-2013) under Grant Agreement No. 241818 (FP7-HEALTH-F5-2009-241818-NANOANTENNA). B.F., C.d'A E.M., O.M.M., and P.G.G. acknowledge support by MIUR under Project PRIN 2008J858Y7 and by Programma Operativo Nazionale Ricerca e Competitivita 2007-2013, PON01_01322 PANREX. J.B. acknowledges support from the Heidelberg Graduate School of Fundamental Physics.
PublisherAmerican Chemical Society (ACS)
- Directivity enhanced Raman spectroscopy using nanoantennas.
- Authors: Ahmed A, Gordon R
- Issue date: 2011 Apr 13
- Single-order, subwavelength resonant nanograting as a uniformly hot substrate for surface-enhanced Raman spectroscopy.
- Authors: Deng X, Braun GB, Liu S, Sciortino PF Jr, Koefer B, Tombler T, Moskovits M
- Issue date: 2010 May 12
- Nanofabrication of densely packed metal-polymer arrays for surface-enhanced Raman spectrometry.
- Authors: De Jesús MA, Giesfeldt KS, Oran JM, Abu-Hatab NA, Lavrik NV, Sepaniak MJ
- Issue date: 2005 Dec
- Plasmonic nanopillar arrays for large-area, high-enhancement surface-enhanced Raman scattering sensors.
- Authors: Caldwell JD, Glembocki O, Bezares FJ, Bassim ND, Rendell RW, Feygelson M, Ukaegbu M, Kasica R, Shirey L, Hosten C
- Issue date: 2011 May 24
- Focusing plasmons in nanoslits for surface-enhanced Raman scattering.
- Authors: Chen C, Hutchison JA, Van Dorpe P, Kox R, De Vlaminck I, Uji-I H, Hofkens J, Lagae L, Maes G, Borghs G
- Issue date: 2009 Dec