Functional plasmonic nanocircuits with low insertion and propagation losses.

نویسندگان

  • Arian Kriesch
  • Stanley P Burgos
  • Daniel Ploss
  • Hannes Pfeifer
  • Harry A Atwater
  • Ulf Peschel
چکیده

We experimentally demonstrate plasmonic nanocircuits operating as subdiffraction directional couplers optically excited with high efficiency from free-space using optical Yagi-Uda style antennas at λ0 = 1550 nm. The optical Yagi-Uda style antennas are designed to feed channel plasmon waveguides with high efficiency (45% in coupling, 60% total emission), narrow angular directivity (<40°), and low insertion loss. SPP channel waveguides exhibit propagation lengths as large as 34 μm with adiabatically tuned confinement and are integrated with ultracompact (5 × 10 μm(2)), highly dispersive directional couplers, which enable 30 dB discrimination over Δλ = 200 nm with only 0.3 dB device loss.

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عنوان ژورنال:
  • Nano letters

دوره 13 9  شماره 

صفحات  -

تاریخ انتشار 2013