Octave-wide photonic band gap in three-dimensional plasmonic Bragg structures and limitations of radiative coupling

Richard Taubert, Daniel Dregely, Tineke Stroucken, Andre Christ and Harald Giessen ()
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Richard Taubert: 4th Physics Institute and Research Center SCoPE, University of Stuttgart
Daniel Dregely: 4th Physics Institute and Research Center SCoPE, University of Stuttgart
Tineke Stroucken: Philipps-University
Andre Christ: 4th Physics Institute and Research Center SCoPE, University of Stuttgart
Harald Giessen: 4th Physics Institute and Research Center SCoPE, University of Stuttgart

Nature Communications, 2012, vol. 3, issue 1, 1-6

Abstract: Abstract Radiative coupling between oscillators is one of the most fundamental subjects of research in optics, where particularly a Bragg-type arrangement is of interest and has already been applied to atoms and excitons in quantum wells. Here we explore this arrangement in a plasmonic structure. We observe the emergence of an octave-wide photonic band gap in the optical regime. Compared with atomic or excitonic systems, the coupling efficiency of the particle plasmons utilized here is several orders of magnitude larger and widely tunable by changing the size and geometry of the plasmonic nanowires. We are thus able to explore the regime where the coupling distance is even limited by the large radiative decay rate of the oscillators. This Bragg-stacked coupling scheme will open a new route for future plasmonic applications such as far-field coupling to quantum emitters without quenching, plasmonic cavity structures and plasmonic distributed gain schemes for spasers.

Date: 2012
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DOI: 10.1038/ncomms1694

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