The Experts below are selected from a list of 4710 Experts worldwide ranked by ideXlab platform

Douglas R. Macfarlane - One of the best experts on this subject based on the ideXlab platform.

  • hierarchical porous Plasmonic Metamaterials for reproducible ultrasensitive surface enhanced raman spectroscopy
    Advanced Materials, 2015
    Co-Authors: Xinyi Zhang, Yuanhui Zheng, Xin Liu, Jiyan Dai, Dang Yuan Lei, Douglas R. Macfarlane
    Abstract:

    Hierarchical porous Plasmonic Metamaterials consisting of periodic nanoholes with tunable diameter and uniformly distributed mesopores over the bulk are developed as a new class of 3D surface-enhanced Raman spectroscopy (SERS) substrates. This multiscale architecture not only facilitates efficient cascaded electromagnetic enhancement but also provides an enormous number of Raman-active binding sites, exhibiting excellent reproducibility and ultrasensitive detection of aromatic molecules down to 10(-13) M.

  • Hierarchical Porous Plasmonic Metamaterials for Reproducible Ultrasensitive Surface‐Enhanced Raman Spectroscopy
    Advanced materials (Deerfield Beach Fla.), 2014
    Co-Authors: Xinyi Zhang, Yuanhui Zheng, Xin Liu, Jiyan Dai, Dang Yuan Lei, Douglas R. Macfarlane
    Abstract:

    Hierarchical porous Plasmonic Metamaterials consisting of periodic nanoholes with tunable diameter and uniformly distributed mesopores over the bulk are developed as a new class of 3D surface-enhanced Raman spectroscopy (SERS) substrates. This multiscale architecture not only facilitates efficient cascaded electromagnetic enhancement but also provides an enormous number of Raman-active binding sites, exhibiting excellent reproducibility and ultrasensitive detection of aromatic molecules down to 10(-13) M.

Xinyi Zhang - One of the best experts on this subject based on the ideXlab platform.

  • hierarchical porous Plasmonic Metamaterials for reproducible ultrasensitive surface enhanced raman spectroscopy
    Advanced Materials, 2015
    Co-Authors: Xinyi Zhang, Yuanhui Zheng, Xin Liu, Jiyan Dai, Dang Yuan Lei, Douglas R. Macfarlane
    Abstract:

    Hierarchical porous Plasmonic Metamaterials consisting of periodic nanoholes with tunable diameter and uniformly distributed mesopores over the bulk are developed as a new class of 3D surface-enhanced Raman spectroscopy (SERS) substrates. This multiscale architecture not only facilitates efficient cascaded electromagnetic enhancement but also provides an enormous number of Raman-active binding sites, exhibiting excellent reproducibility and ultrasensitive detection of aromatic molecules down to 10(-13) M.

  • Hierarchical Porous Plasmonic Metamaterials for Reproducible Ultrasensitive Surface‐Enhanced Raman Spectroscopy
    Advanced materials (Deerfield Beach Fla.), 2014
    Co-Authors: Xinyi Zhang, Yuanhui Zheng, Xin Liu, Jiyan Dai, Dang Yuan Lei, Douglas R. Macfarlane
    Abstract:

    Hierarchical porous Plasmonic Metamaterials consisting of periodic nanoholes with tunable diameter and uniformly distributed mesopores over the bulk are developed as a new class of 3D surface-enhanced Raman spectroscopy (SERS) substrates. This multiscale architecture not only facilitates efficient cascaded electromagnetic enhancement but also provides an enormous number of Raman-active binding sites, exhibiting excellent reproducibility and ultrasensitive detection of aromatic molecules down to 10(-13) M.

Lei Zhou - One of the best experts on this subject based on the ideXlab platform.

  • nearly total absorption of light and heat generation by Plasmonic Metamaterials
    Physical Review B, 2011
    Co-Authors: Lei Zhou
    Abstract:

    We theoretically and numerically study the absorption effect and the heat generation in Plasmonic Metamaterials under light radiation at their Plasmonic resonance. Three different types of structur ...

  • Nearly total absorption of light and heat generation by Plasmonic Metamaterials
    Physical Review B, 2011
    Co-Authors: Jiaming Hao, Lei Zhou, Min Qiu
    Abstract:

    We theoretically and numerically study the absorption effect and the heat generation in Plasmonic Metamaterials under light radiation at their Plasmonic resonance. Three different types of structures, all possessing high-performance absorption for visible lights, are investigated. The main aim of this work is to present an intuitive and original understanding of the high-performance absorption effects. From the macroscopic electromagnetic point of view, the effective-medium approach is used to describe the absorption effects of the Plasmonic Metamaterials. On the other hand, the field distributions and heat generation effects in such Plasmonic nanostructures are investigated, which also provides a satisfactory qualitative description of such absorption behavior based upon the microscopic perspective.

  • Fractal Plasmonic Metamaterials for subwavelength imaging.
    Optics express, 2010
    Co-Authors: Xueqin Huang, Shiyi Xiao, Jiangtao Huangfu, Zhiyu Wang, Lixin Ran, Lei Zhou
    Abstract:

    We show that a metallic plate with periodic fractal-shaped slits can be homogenized as a Plasmonic metamaterial with plasmon frequency dictated by the fractal geometry. Owing to the all-dimensional subwavelength nature of the fractal pattern, our system supports both transverse-electric and transverse-magnetic surface plasmons. As a result, this structure can be employed to focus light sources with all-dimensional subwavelength resolution and enhanced field strengths. Microwave experiments reveal that the best achievable resolution is onlyλ/15, and finite-difference-time-domain simulations demonstrate that similar effects can be realized at infrared frequencies with appropriate designs.

  • Tunable Plasmonic Metamaterials based on fractal geometry
    2008 International Workshop on Metamaterials, 2008
    Co-Authors: Lei Zhou, Xueqin Huang, Shiyi Xiao
    Abstract:

    Surface plasmon polaritons (SPPs) are elementary electromagnetic (EM) excitations bounded at a metal/dielectric interface. Due to two important features - local field enhancement and subwavelength resolution capability - of the SPP, it has attracted considerable attention recently and many SPP-based applications were proposed or demonstrated. However, for a natural material, its plasmon frequency (pomega) is fixed by electron density. This restriction limits the aforementioned SPP-based applications to a wider frequency regime. In this talk, we show that a metallic plate with subwavelength fractal-shaped slits supports SPpsilas with omegaptuned efficiently by the geometry of the fractal structure. We derive effective-medium models to describe such tunable Plasmonic Metamaterials, and found that the latter can mimic Plasmonic metals in frequency regimes beyond the (fixed) plasmon frequencies of natural metals (gold, silver, etc.). We show that our Plasmonic Metamaterials possess many applications. As one example, we show that one can use it to focus light sources with subwavelength imaging abilities and enhanced field strengths. Finite-difference-time-domain (FDTD) simulations are performed to design realistic structures and verify all predicted phenomena.

Xin Liu - One of the best experts on this subject based on the ideXlab platform.

  • hierarchical porous Plasmonic Metamaterials for reproducible ultrasensitive surface enhanced raman spectroscopy
    Advanced Materials, 2015
    Co-Authors: Xinyi Zhang, Yuanhui Zheng, Xin Liu, Jiyan Dai, Dang Yuan Lei, Douglas R. Macfarlane
    Abstract:

    Hierarchical porous Plasmonic Metamaterials consisting of periodic nanoholes with tunable diameter and uniformly distributed mesopores over the bulk are developed as a new class of 3D surface-enhanced Raman spectroscopy (SERS) substrates. This multiscale architecture not only facilitates efficient cascaded electromagnetic enhancement but also provides an enormous number of Raman-active binding sites, exhibiting excellent reproducibility and ultrasensitive detection of aromatic molecules down to 10(-13) M.

  • Hierarchical Porous Plasmonic Metamaterials for Reproducible Ultrasensitive Surface‐Enhanced Raman Spectroscopy
    Advanced materials (Deerfield Beach Fla.), 2014
    Co-Authors: Xinyi Zhang, Yuanhui Zheng, Xin Liu, Jiyan Dai, Dang Yuan Lei, Douglas R. Macfarlane
    Abstract:

    Hierarchical porous Plasmonic Metamaterials consisting of periodic nanoholes with tunable diameter and uniformly distributed mesopores over the bulk are developed as a new class of 3D surface-enhanced Raman spectroscopy (SERS) substrates. This multiscale architecture not only facilitates efficient cascaded electromagnetic enhancement but also provides an enormous number of Raman-active binding sites, exhibiting excellent reproducibility and ultrasensitive detection of aromatic molecules down to 10(-13) M.

Jiyan Dai - One of the best experts on this subject based on the ideXlab platform.

  • hierarchical porous Plasmonic Metamaterials for reproducible ultrasensitive surface enhanced raman spectroscopy
    Advanced Materials, 2015
    Co-Authors: Xinyi Zhang, Yuanhui Zheng, Xin Liu, Jiyan Dai, Dang Yuan Lei, Douglas R. Macfarlane
    Abstract:

    Hierarchical porous Plasmonic Metamaterials consisting of periodic nanoholes with tunable diameter and uniformly distributed mesopores over the bulk are developed as a new class of 3D surface-enhanced Raman spectroscopy (SERS) substrates. This multiscale architecture not only facilitates efficient cascaded electromagnetic enhancement but also provides an enormous number of Raman-active binding sites, exhibiting excellent reproducibility and ultrasensitive detection of aromatic molecules down to 10(-13) M.

  • Hierarchical Porous Plasmonic Metamaterials for Reproducible Ultrasensitive Surface‐Enhanced Raman Spectroscopy
    Advanced materials (Deerfield Beach Fla.), 2014
    Co-Authors: Xinyi Zhang, Yuanhui Zheng, Xin Liu, Jiyan Dai, Dang Yuan Lei, Douglas R. Macfarlane
    Abstract:

    Hierarchical porous Plasmonic Metamaterials consisting of periodic nanoholes with tunable diameter and uniformly distributed mesopores over the bulk are developed as a new class of 3D surface-enhanced Raman spectroscopy (SERS) substrates. This multiscale architecture not only facilitates efficient cascaded electromagnetic enhancement but also provides an enormous number of Raman-active binding sites, exhibiting excellent reproducibility and ultrasensitive detection of aromatic molecules down to 10(-13) M.