Resonant transmission of light through finite chains of subwavelength holes in a metallic film.

Departamento de Física Teórica de la Materia Condensada, Universidad Autónoma de Madrid, E-28049 Madrid, Spain.
Physical Review Letters (Impact Factor: 7.73). 12/2004; 93(22):227401. DOI: 10.1103/PhysRevLett.93.227401
Source: arXiv

ABSTRACT In this Letter we show that the extraordinary optical transmission phenomenon found before in 2D hole arrays is already present in a linear chain of subwavelength holes, which can be considered as the basic geometrical unit showing this property. In order to study this problem, we have developed a new theoretical framework, able to analyze the optical properties of finite collections of subwavelength apertures and/or dimples (of any shape and placed in arbitrary positions) drilled in a metallic film.

  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: In this paper, we present a review of experimental studies of terahertz plasmonic transmission properties through subwavelength holes patterned in conducting films. The frequency-dependent transmission spectrum reveals resonant behavior with an anomalously high peak transmission which is mediated by the excitation of surface plasmon polaritons. We show how terahertz time-domain spectroscopy has been utilized to determine the resonant transmission effects of hole shape, dielectric properties of materials, and thickness of the arrays. Enhanced terahertz transmission was also observed through a single hole, accompanied by annular periodic corrugations. In addition to metals films, we review films comprised of highly doped semiconductors and superconductors. We finally review various modulation schemes to actively control or manipulate the resonant terahertz transmission using external stimuli such as thermal, optical, and electrical fields. This body of work is used to provide perspective on how manipulation of terahertz radiation via surface plasmon polaritons could affect next-generation terahertz photonic devices.
    IEEE Journal of Selected Topics in Quantum Electronics 01/2013; 19(1):8400416-8400416. · 3.47 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: The transmission characteristics of free-standing metasurfaces consisting of square metal patch, which rotated 45° (which is defined as the rotated metasurfaces) or 0° (which is defined as the regular metasurfaces) around their array arrangement direction, have been studied at microwave frequencies. The proposed metasurfaces in vacuum environment, considered as free-standing planar frequency selective surfaces, are analyzed for searching its transmission characteristics with variable dimension at different frequencies. For the rotated metasurfaces, a bizarre phenomenon, in which transmission will increase inversely as the size of the rotated square metal patch is increased, can be observed at the periodicity of these arrays between 2λ/3 and 4λ/5, where λ is the considered wavelength. But for the regular metasurfaces, this phenomenon cannot be observed. In addition, the rotated metasurfaces and the regular metasurfaces loading on infinite resistive sheet are also studied for discussing its transmission and reflection properties with similar conditions. It is found that the regular metasurfaces loading on infinite resistive sheet show almost linear variable electromagnetic characteristic with the variable size of the regular metasurfaces at a broad frequency range. However, because of the scattering mechanism of evanescent diffraction, the similar linear relationship of electromagnetic characteristic cannot be obtained from the rotated case. These results can be used as a guide for realizing tensor impedance surfaces with various gradient properties.
    Journal of Electromagnetic Waves and Applications 07/2014; 28(12). · 1.40 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: In this work, by using the finite difference time domain (FDTD) method, we have numerically studied the transmission properties of a composite structure consisting of a de-focusing tapered slit and nano-strip. For a fixed wavelength, the dependence of transmission efficiency of light on the structure parameters is demonstrated in detail. we have found that the extraordinary optical transmission through a single tapered metallic nano-slit is enhanced by placing a metallic nano-strip over it, in which tapered slit with large taper angle is used for de-focusing of light and be avoid of Fabry-Perot resonance in straight metallic nano-slit. It is shown that a suitable tapered slit assisted by nano-cavity-antenna can enhance the transmission by about 50% (compared with that in straight slit case). Furthermore, the parameters of the tapered slit (the taper angle and the taper length) hardly change the resonance in the horizontal nano-cavity. The transmission spectrum of the tapered slit can also be tuned by adjusting the taper angle. Such striking characteristic tapered slit has promising applications in designing optical nano-scale device.
    Optics & Laser Technology 12/2013; 54:214-218. · 1.65 Impact Factor

Preview (2 Sources)

Available from