title: Hybrid Dielectric-loaded Nanoridge Plasmonic Waveguide for Low-Loss Light Transmission at the Subwavelength Scale.
abstract: The emerging development of the hybrid plasmonic waveguide has recently received significant attention owing to its remarkable capability of enabling subwavelength field confinement and great transmission distance. Here we report a guiding approach that integrates hybrid plasmon polariton with dielectric-loaded plasmonic waveguiding. By introducing a deep-subwavelength dielectric ridge between a dielectric slab and a metallic substrate, a hybrid dielectric-loaded nanoridge plasmonic waveguide is formed. The waveguide features lower propagation loss than its conventional hybrid waveguiding counterpart, while maintaining strong optical confinement at telecommunication wavelengths. Through systematic structural parameter tuning, we realize an efficient balance between confinement and attenuation of the fundamental hybrid mode, and we demonstrate the tolerance of its properties despite fabrication imperfections. Furthermore, we show that the waveguide concept can be extended to other metal/dielectric composites as well, including metal-insulator-metal and insulator-metal-insulator configurations. Our hybrid dielectric-loaded nanoridge plasmonic platform may serve as a fundamental building block for various functional photonic components and be used in applications such as sensing, nanofocusing, and nanolasing.
authors.affiliation: Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA.|Department of Fluid Machinery and Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, P. R. China.
authors.forename: Bin
authors.initials: B
authors.lastname: Zhang
authors.affiliation: Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA.
authors.forename: Yusheng
authors.initials: Y
authors.lastname: Bian
authors.affiliation: Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA.
authors.forename: Liqiang
authors.initials: L
authors.lastname: Ren
authors.affiliation: Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA.
authors.forename: Feng
authors.initials: F
authors.lastname: Guo
authors.affiliation: Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA.
authors.forename: Shi-Yang
authors.initials: SY
authors.lastname: Tang
authors.affiliation: Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA.
authors.forename: Zhangming
authors.initials: Z
authors.lastname: Mao
authors.affiliation: Department of Fluid Machinery and Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, P. R. China.
authors.forename: Xiaomin
authors.initials: X
authors.lastname: Liu
authors.affiliation: Department of Fluid Machinery and Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, P. R. China.
authors.forename: Jinju
authors.initials: J
authors.lastname: Sun
authors.affiliation: Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA.|MOE Key Laboratory of Thermo-Fluid Science and Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, P. R. China.
authors.forename: Jianying
authors.initials: J
authors.lastname: Gong
authors.affiliation: Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA.|Key Laboratory of Modern Acoustics (MOE), Department of Physics, Nanjing University, Nanjing 210093, P.R. China.
authors.forename: Xiasheng
authors.initials: X
authors.lastname: Guo
authors.affiliation: Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA.|Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA.
authors.forename: Tony Jun
authors.initials: TJ
authors.lastname: Huang
mesh_terms: D004560:Electricity; D008027:Light; D053758:Nanoparticles / Q000737:chemistry*; D012825:Silicon / Q000737:chemistry
chemical_list: D012825:Silicon