Adiabatic nanofocusing scattering-type optical nanoscopy of individual gold nanoparticles

Diyar Sadiq, Javid Shirdel, Jae Sung Lee, Elena Selishcheva, Namkyoo Park, Christoph Lienau

Research output: Contribution to journalArticleResearchpeer-review

64 Citations (Scopus)

Abstract

We explore imaging of local electromagnetic fields in the vicinity of metallic nanoparticles using a grating-coupled scattering-type near-field scanning optical microscope. In this microscope, propagating surface plasmon polariton wavepackets are launched onto smooth gold tapers where they are adiabatically focused toward the nanometer-sized taper apex. We report two-dimensional raster-scanned optical images showing pronounced near-field contrast and demonstrating sub-30 nm resolution imaging of localized surface plasmon polariton fields of spherical and elliptical nanoparticles. By comparison to three-dimensional finite-difference time domain simulations, we conclude that virtually background-free near-field imaging is achieved. The microscope combines deep subwavelength resolution, high local field intensities and a straightforward imaging contrast, making it interesting for a variety of applications in linear and nonlinear nanospectroscopy.

Original languageEnglish
Pages (from-to)1609-1613
Number of pages5
JournalNano Letters
Volume11
Issue number4
DOIs
StatePublished - 13 Apr 2011

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Gold
near fields
Scattering
gold
tapering
Nanoparticles
Imaging techniques
polaritons
nanoparticles
Microscopes
scattering
microscopes
optical microscopes
electromagnetic fields
apexes
gratings
Electromagnetic fields
scanning
high resolution
Scanning

Keywords

  • FDTD simulation
  • Surface plasmon polaritons
  • adiabatic nanofocusing
  • metallic nanoparticles
  • scattering-type near-field scanning optical microscopy

Cite this

Sadiq, Diyar ; Shirdel, Javid ; Lee, Jae Sung ; Selishcheva, Elena ; Park, Namkyoo ; Lienau, Christoph. / Adiabatic nanofocusing scattering-type optical nanoscopy of individual gold nanoparticles. In: Nano Letters. 2011 ; Vol. 11, No. 4. pp. 1609-1613.
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Sadiq, D, Shirdel, J, Lee, JS, Selishcheva, E, Park, N & Lienau, C 2011, 'Adiabatic nanofocusing scattering-type optical nanoscopy of individual gold nanoparticles', Nano Letters, vol. 11, no. 4, pp. 1609-1613. https://doi.org/10.1021/nl1045457

Adiabatic nanofocusing scattering-type optical nanoscopy of individual gold nanoparticles. / Sadiq, Diyar; Shirdel, Javid; Lee, Jae Sung; Selishcheva, Elena; Park, Namkyoo; Lienau, Christoph.

In: Nano Letters, Vol. 11, No. 4, 13.04.2011, p. 1609-1613.

Research output: Contribution to journalArticleResearchpeer-review

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