A Resonant Scanning Dipole-Antenna Probe for Enhanced Nanoscale Imaging

L. Neumann, Jan Joannes Frederik van 't Oever, N.F. van Hulst

Research output: Contribution to journalArticleAcademicpeer-review

20 Citations (Scopus)


We present a scanning antenna probe that provides 35 nm optical hotspots with a 16-fold excitation enhancement. A resonant optical antenna, tuned to operation in the visible, is carved into the aluminum-coated scanning probe. The antenna resonances, field localization, excitation, and polarization response are probed in the near-field by scanning over single fluorescent nanobeads. At the same time, the distance-dependent coupling of the emission to the antenna mode is mapped. Good agreement with theory is obtained. The presented scanning antenna approach is useful for both nanoscale plasmonic mode imaging and (bio)imaging
Original languageEnglish
Pages (from-to)5070-5074
Number of pages4
JournalNano letters
Issue number11
Publication statusPublished - 2013


  • IR-88592
  • METIS-300629


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