Nano Archive

Grating-coupling of surface plasmons onto metallic tips: A nanoconfined light source

Ropers, C and Neacsu, C. C. and Elsaesser, T and Albrecht, M and Raschke, M. B. and Lienau, C (2007) Grating-coupling of surface plasmons onto metallic tips: A nanoconfined light source. NANO LETTERS, 7 (9). pp. 2784-2788.

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Official URL: http://dx.doi.org/10.1021/nl071340m

Abstract

We describe and demonstrate a new nanometer-scale broadband light source. It is based on the grating-coupled excitation of surface plasmon polaritons (SPPs) on the shaft of a sharp conical metal taper with a tip radius of few tens of nanometers. Far-field excitation of linear nanoslit gratings results in the resonant generation of SPPs traveling over more than 10 mu m to the tip apex and converging to an intense radiative local light spot. Such nanofabricated tips are expected to find various applications in nanospectroscopy, overcoming problems with background illumination in apertureless microscopy.

Item Type:Article
Subjects:Analytical Science > Microscopy and probe methods
Physical Science > Nanophysics
Physical Science > Photonics
ID Code:2611
Deposited By:Anuj Seth
Deposited On:09 Jan 2009 15:56
Last Modified:12 Feb 2009 12:29

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