Functional plasmonic nanocircuits with low insertion and propagation losses.
basic_science · Level V
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- Record sourced from PubMed, PMID 23962146.
- Also identified by DOI 10.1021/nl402580c.
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Abstract
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.
Medical subject headings
- Nanotechnology
- Optics and Photonics
- Surface Plasmon Resonance