Mechanism of Near-Field Raman Enhancement in One-Dimensional Systems

L. G. Cançado, A. Jorio, A. Ismach, E. Joselevich, A. Hartschuh, and L. Novotny

Phys. Rev. Lett. 103, 186101 – Published 26 October 2009

Abstract

We develop a theory of near-field Raman enhancement in one-dimensional systems, and report supporting experimental results for carbon nanotubes. The enhancement is established by a laser-irradiated nanoplasmonic structure acting as an optical antenna. The near-field Raman intensity is inversely proportional to the 10th power of the separation between the enhancing structure and the one-dimensional system. Experimental data obtained from single-wall carbon nanotubes indicate that the Raman enhancement process is not significantly influenced by the specific phonon eigenvector, and is mainly defined by the properties of the nanoplasmonic structure.

Received 24 June 2009

DOI:https://doi.org/10.1103/PhysRevLett.103.186101

Authors & Affiliations

L. G. Cançado¹, A. Jorio², A. Ismach³, E. Joselevich³, A. Hartschuh⁴, and L. Novotny^1,*

¹The Institute of Optics, University of Rochester, Rochester, New York 14627, USA
²Departamento de Física, Universidade Federal de Minas Gerais, Belo Horizonte, MG, 30123-970, Brazil
³Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot 76100, Israel
⁴Department Chemie und Biochemie and CeNS, Ludwig-Maximilians-Universität München, 81377 München, Germany

^*http://www.nano-optics.org

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Issue

Vol. 103, Iss. 18 — 30 October 2009

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