Phase-sensitive spectroscopy of surface plasmons in individual metal nanostructures

A. A. Mikhailovsky, M. A. Petruska, Kuiru Li, M. I. Stockman, Victor I Klimov

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

We analyze both theoretically and experimentally the response of individual gold nanoparticles and nanoparticle dimers to a near-field excitation with broad-band radiation (a femtosecond white-light continuum) delivered through a subwavelength aperture. Because of the coherent superposition of the field emitted by the aperture and the secondary field reemitted by the nanostructure, the signals detected in the far zone exhibit a pronounced dependence on the phase of plasmon oscillations excited in the nanostructure. This phase sensitivity allows us to accurately determine positions of plasmon resonances not distorted by dielectric losses in a metal. In the near-field extinction spectra of individual nanoparticles, the plasmon resonance is observed as the "zero-extinction" point in which the transition from constructive (lower spectral energies) to destructive (higher spectral energies) interference occurs. By using spatially selective near-field excitation with a femtosecond white-light continuum, we are able to detect slight asymmetries in dimers composed of nominally identical nanoparticles.

Original languageEnglish
Article number085401
Pages (from-to)854011-854016
Number of pages6
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume69
Issue number8
Publication statusPublished - Feb 2004

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Plasmons
plasmons
Nanostructures
Metals
Spectroscopy
Nanoparticles
near fields
nanoparticles
Dimers
metals
spectroscopy
extinction
apertures
dimers
continuums
Dielectric losses
dielectric loss
Gold
excitation
asymmetry

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Mikhailovsky, A. A., Petruska, M. A., Li, K., Stockman, M. I., & Klimov, V. I. (2004). Phase-sensitive spectroscopy of surface plasmons in individual metal nanostructures. Physical Review B - Condensed Matter and Materials Physics, 69(8), 854011-854016. [085401].

Phase-sensitive spectroscopy of surface plasmons in individual metal nanostructures. / Mikhailovsky, A. A.; Petruska, M. A.; Li, Kuiru; Stockman, M. I.; Klimov, Victor I.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 69, No. 8, 085401, 02.2004, p. 854011-854016.

Research output: Contribution to journalArticle

Mikhailovsky, AA, Petruska, MA, Li, K, Stockman, MI & Klimov, VI 2004, 'Phase-sensitive spectroscopy of surface plasmons in individual metal nanostructures', Physical Review B - Condensed Matter and Materials Physics, vol. 69, no. 8, 085401, pp. 854011-854016.
Mikhailovsky, A. A. ; Petruska, M. A. ; Li, Kuiru ; Stockman, M. I. ; Klimov, Victor I. / Phase-sensitive spectroscopy of surface plasmons in individual metal nanostructures. In: Physical Review B - Condensed Matter and Materials Physics. 2004 ; Vol. 69, No. 8. pp. 854011-854016.
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