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Optics Letters

Optics Letters

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  • Vol. 28, Iss. 18 — Sep. 15, 2003
  • pp: 1686–1688

Broadband near-field interference spectroscopy of metal nanoparticles using a femtosecond white-light continuum

A. A. Mikhailovsky, M. A. Petruska, M. I. Stockman, and V. I. Klimov  »View Author Affiliations


Optics Letters, Vol. 28, Issue 18, pp. 1686-1688 (2003)
http://dx.doi.org/10.1364/OL.28.001686


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Abstract

We demonstrate a new nanoscale spectroscopic technique that combines subwavelength near-field imaging with broadband interference spectroscopy. We apply this technique to study phase spectra of surface plasmons in individual gold nanoparticles and nanoparticle dimers. Collective plasmon oscillations in selected nanostructures are excited by a femtosecond white-light continuum transmitted through a subwavelength aperture. The interference spectra detected in the far field result from the coherent superposition of the aperture field and the secondary field re-emitted by the nanostructure. The analysis of these spectra allows us to accurately measure the positions and damping constants of single-nanostructure plasmon resonances.

© 2003 Optical Society of America

OCIS Codes
(180.5810) Microscopy : Scanning microscopy
(300.0300) Spectroscopy : Spectroscopy
(320.0320) Ultrafast optics : Ultrafast optics

Citation
A. A. Mikhailovsky, M. A. Petruska, M. I. Stockman, and V. I. Klimov, "Broadband near-field interference spectroscopy of metal nanoparticles using a femtosecond white-light continuum," Opt. Lett. 28, 1686-1688 (2003)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-28-18-1686


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