Theoretical and experimental investigation of strongly localized plasmons on triangular metal wedges for subwavelength waveguiding

D. F.P. Pile, T. Ogawa, D. K. Gramotnev, T. Okamoto, M. Haraguchi, M. Fukui, S. Matsuo

Research output: Contribution to journalArticle

246 Citations (Scopus)


We report numerical analysis and experimental observation of strongly localized plasmons guided by a triangular metal wedge. Dispersion and dissipation of such wedge plasmons are analyzed using the finite-difference time-domain algorithm. Experimental observation is conducted by the end-fire excitation and near-field detection of the predicted plasmons on a 40° silver nanowedge. Good agreement with the theoretically predicted propagation distances is demonstrated. Differences between the theoretical and experimental field distribution are explained by insufficient resolution of the near-field optical probe.

Original languageEnglish
Article number061106
JournalApplied Physics Letters
Issue number6
Publication statusPublished - 2005 Sep 5


ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this