@article{2013-kriesch-peschel-nan-let-v13-9-p4539,
	Abstract = {<p>
	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 &lambda;<sub>0</sub> = 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 &mu;m with adiabatically tuned confinement and are integrated with ultracompact (5 × 10 &mu;m<sup>2</sup>), highly dispersive directional couplers, which enable 30 dB discrimination over &Delta;&lambda; = 200 nm with only 0.3 dB device loss.</p>},
	Author = {Kriesch, A. AND Burgos, S. P. AND Ploss, D. AND Pfeifer, H. AND Atwater, H. A. AND Peschel, U.},
	Journal = {Nano letters},
	Pages = {4539},
	Title = {{Functional plasmonic nanocircuits with low insertion and propagation losses}},
	Volume = {13 (9)},
	Year = {2013}
}