Slow-plasmon resonant-nanostrip antennas: Analysis and demonstration

Thomas Søndergaard, J. Beermann, Alexandra Boltasseva, S.I. Bozhevolnyi

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Resonant scattering by gold nanostrip antennas due to constructive interference of counterpropagating slow surface plasmon polaritons (SPPs) is analyzed, including the quasistatic limit of ultrasmall antennas, and experimentally demonstrated. The phase of slow SPP reflection by strip ends is found from scattering spectra revealing the influence of non-SPP field components. Experimental scattering spectra of gold 17- and 23-nm-thin strips of 100-500 nm widths placed on quartz and covered with index-matching oil are in excellent agreement with theoretical predictions.
Original languageEnglish
JournalPhysical Review B Condensed Matter
Issue number11
Pages (from-to)115420
Publication statusPublished - 2008

Bibliographical note

Copyright 2008 American Physical Society


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