Characterization of planar hybrid dielectric-loaded plasmonic nano-waveguides used for nano-photonic circuits

Key challenge in the design of plasmonic nano-waveguide is to simultaneously achieve high confinement and low propagation loss. This paper presents that a planar hybrid dielectric-loaded plasmonic nano-waveguide (HDLW) could be a promising candidate to build high-performance plasmonic components. Our studies show that the HDLW can achieve better trade-off between the field intensity confinement and the propagation length than a metal-insulator-metal nanoslot waveguide does. Consequently, a 90°-circular bend built with the HDLW can achieve a total loss of 0.3 dB with a small bending radius of 2µm. A ring resonator formed with the HDLW shows the excellent performance: with a ring radius of 5 µm, this resonator exhibits a large free spectral range (22 nm), a narrow bandwidth (4 nm), and high extinction ration (20 dB). The superior performance of these plasmonic components makes them promising building blocks for nanophotonic integrated circuits.

[1]  Allen Taflove,et al.  Computational Electrodynamics the Finite-Difference Time-Domain Method , 1995 .

[2]  Laurent Markey,et al.  Dielectric-loaded plasmonic waveguide-ring resonators. , 2009, Optics express.

[3]  Harry A. Atwater,et al.  Planar metal plasmon waveguides: frequency-dependent dispersion, propagation, localization, and loss beyond the free electron model , 2005 .

[4]  T. Ebbesen,et al.  Channel plasmon-polariton guiding by subwavelength metal grooves. , 2005, Physical review letters.

[5]  Jean-Claude Weeber,et al.  Plasmon polaritons of metallic nanowires for controlling submicron propagation of light , 1999 .

[6]  Er-Ping Li,et al.  Optical performance of single-mode hybrid dielectric-loaded plasmonic waveguide-based components , 2010 .

[7]  W. Barnes,et al.  Surface plasmon subwavelength optics , 2003, Nature.

[8]  Zhaoming Zhu,et al.  Full-vectorial finite-difference analysis of microstructured optical fibers. , 2002, Optics express.

[9]  T. Ebbesen,et al.  Channel plasmon subwavelength waveguide components including interferometers and ring resonators , 2006, Nature.

[10]  Sergey I. Bozhevolnyi,et al.  Theoretical analysis of dielectric-loaded surface plasmon-polariton waveguides , 2007 .

[11]  X. Zhang,et al.  A hybrid plasmonic waveguide for subwavelength confinement and long-range propagation , 2008 .

[12]  Qianfan Xu,et al.  Guiding and confining light in void nanostructure. , 2004, Optics letters.

[13]  Ning-Ning Feng,et al.  Metal–Dielectric Slot-Waveguide Structures for the Propagation of Surface Plasmon Polaritons at 1.55 $\mu{\hbox {m}}$ , 2007, IEEE Journal of Quantum Electronics.

[14]  Er-Ping Li,et al.  Analysis of sub-wavelength light propagation through long double-chain nanowires with funnel feeding. , 2007, Optics express.

[15]  R. W. Christy,et al.  Optical Constants of the Noble Metals , 1972 .