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Applied Physics Letters / Volume 96 / Issue 22 / LASERS, OPTICS, AND OPTOELECTRONICS

Appl. Phys. Lett. 96, 221103 (2010); http://dx.doi.org/10.1063/1.3437088 (3 pages)

Optical performance of single-mode hybrid dielectric-loaded plasmonic waveguide-based components

Hong-Son Chu, Er-Ping Li, Ping Bai, and Ravi Hegde

Advanced Photonics and Plasmonics Group, A*STAR-Institute of High Performance Computing, Singapore 138632

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(Received 11 March 2010; accepted 4 May 2010; published online 2 June 2010)

The single mode hybrid dielectric-loaded plasmonic waveguide is presented at the wavelength of 1.55 μm. We show that this waveguiding structure, consisting of a low-index SiO2-stripe sandwiched between a high-index Si-nanowire and a silver film, achieves both long propagation length and strong field confinement with high power intensity. Components such as 90°-circular and S-shaped bends, based on the proposed waveguide with an intensity confinement area of 50×200 nm2, can obtain a total transmission efficiency exceeding 85% for various bend radii. Finally, we demonstrate that the efficient directional couplers can be developed using two coupled waveguides. In particular, we determine the typical coupling lengths and maximum transfer power for different structural parameters of the coupler. These investigations provide the foundations for the design of chip-scale integrated plasmonic circuitry.

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

elemental semiconductors, integrated optics, light propagation, light transmission, nanowires, optical directional couplers, optical films, optical waveguides, plasmonics, refractive index, silicon, silicon compounds, silver

PACS

  • 42.82.Et

    Waveguides, couplers, and arrays

  • 73.20.Mf

    Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)

  • 78.20.Ci

    Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity)

  • 42.79.Gn

    Optical waveguides and couplers

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3437088

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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    References

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