Broadband Sharp 90-degree Bends and T‑Splitters in Plasmonic Coaxial Waveguides

We demonstrate numerically that sharp 90° bends and T-splitters can be designed in plasmonic coaxial waveguides at deep-subwavelength scale to operate without reflection and radiation over a broad range of wavelengths, including the telecommunication wavelength of 1.55 μm. We explain the principles...

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Bibliographic Details
Published in:Nano letters 2013-10, Vol.13 (10), p.4753-4758
Main Authors: Shin, Wonseok, Cai, Wenshan, Catrysse, Peter B, Veronis, Georgios, Brongersma, Mark L, Fan, Shanhui
Format: Article
Language:English
Subjects:
Bends
Broadband
Circuits
Coaxial waveguides
Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)
Computer-Aided Design
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures
Equipment Design
Exact sciences and technology
Mathematical models
Models, Theoretical
Optical Devices
Optics and Photonics - methods
Physics
Plasmonics
Reflection
Surface and interface electron states
Surface Plasmon Resonance
Wavelengths
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Summary:We demonstrate numerically that sharp 90° bends and T-splitters can be designed in plasmonic coaxial waveguides at deep-subwavelength scale to operate without reflection and radiation over a broad range of wavelengths, including the telecommunication wavelength of 1.55 μm. We explain the principles of the operation using a transmission line model of the waveguide in the quasi-static limit. The compact bends and T-splitters open up a new avenue for the design of densely integrated optical circuits with minimal crosstalk.
ISSN:1530-6984
1530-6992
DOI:10.1021/nl402335x