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SHEET TYPE METAMATERIAL AND SHEEET TYPE LENS

外国特許コード F180009336
整理番号 S2016-0487-C0
掲載日 2018年3月13日
出願国 世界知的所有権機関(WIPO)
国際出願番号 2017JP004381
国際公開番号 WO 2017150098
国際出願日 平成29年2月7日(2017.2.7)
国際公開日 平成29年9月8日(2017.9.8)
優先権データ
  • 特願2016-038296 (2016.2.29) JP
発明の名称 (英語) SHEET TYPE METAMATERIAL AND SHEEET TYPE LENS
発明の概要(英語) This sheet type metamaterial has a first wire array 10 formed on the front surface of a film-like dielectric substrate 12 and a second wire array 11 formed on the back surface of the dielectric substrate 12. The first wire array 10 is constituted of long, thin metal first cut wire 10a of a length l at a spacing g along the direction of the y axis and a spacing s along the direction of the x axis, and a second wire array 11 is constituted of a second cut wire 11a in a symmetrical disposition with the same shape so as to overlap the first cut wire 10a. When the design frequency is 0.51 THz, the thickness d of the dialectic substrate is 50 µm, spacing s is approximately 361 µm, spacing g is approximately 106 µm, and length l for the first cut wire 10a and the second cut wire 11a is a length substantially resonant at the frequency used. Thus, a sheet type metamaterial with an index of refraction of zero can be obtained.
従来技術、競合技術の概要(英語) BACKGROUND ART
Dielectric constant, magnetic permeability of the medium when light is incident to both negative, negative refraction occurring is indicated by beserago, negative magnetic permeability and dielectric constant of the artificial structure has been proposed. Of the magnetic permeability and dielectric constant of the artificial structure is negative, the scale of the wavelength of light is sufficiently larger than the atoms of the structure and assembly is less than, is called a metamaterial. Negative refractive medium using a metamaterial, the full-planar configuration can be created in the lens. Is a full lens, exceeds the diffraction limit to the fine and can be observed, to the near-field (evanescent wave) can be reproduced faithfully.
Metamaterial, attention has recently been applied to the lens of a terahertz wave can be. The terahertz wave, the frequency (wavelength 30 μm-3000 μm) 0.1-10THz and an electromagnetic wave of, far-infrared wavelength region approximately coincides with a millimeter-wave -, 'light' and 'millimeter' between the present frequency domain. Thus, the terahertz wave, as similar to the light with high spatial resolution and the ability to distinguish, the same substance as the millimeter wave transmission are both an ability. To the terahertz wave band electromagnetic wave but this is not the analyte, this frequency band in the time domain by utilizing the characteristics of the electromagnetic wave spectrum, imaging and tomography of a material such as application to characterization have been studied. The generation of the terahertz wave, and the straightness of the transparent material for both safety and innovative X-ray imaging or in alternative, the number of class 100Gbps and an ultra-high speed wireless communication can be possible.
In particular, the terahertz imaging, X-ray instead of the safety, ease and high accuracy of visualization techniques have major attractiveness as one 1. Break through the diffraction limit by near-field terahertz nano imaging or, the resolution is 1.4THz 400nm (1 wavelength/540) can be obtained have been reported. In addition, a resonant tunneling diode may be used in 0.3THz imaging have been reported. A negative refractive index metamaterial can be designed, a near-field light and the evanescent component is restored at a remote location, exceeding the diffraction limit can be realized a full lens plate is.
The applicant, Japanese Patent Application 2015-16116 filed in the terahertz wave band with low loss and a negative refractive index can be obtained with the proposed metamaterial sheet type, Japanese Patent Application 2015-154943 filed in the terahertz wave band with low loss and high refractive index is obtained by forming a sheet-type metamaterial is proposed. In addition, the refractive index of the metamaterial obtained is zero has been proposed (see non-patent document 1). The refractive index of the obtained zero conceptual diagram of a conventional metamaterial 100 shown in 21. 100 Is a metamaterial shown in Fig. 21, dielectric 111 and metal 110 are stacked periodically and with the periodic structure. The metamaterial is, a specific frequency in the case of (critical state), the effective refractive index becomes zero. Zero in the index of refraction material, the phase advancement is not, in other words the light is as shown in a series of peaks and valleys proceeds space, not scheduling engine moves as a wave. Index of refraction material instead of the stationary phase is zero, all of the valley and mountain all, to infinitely long wavelength. The peaks and valleys, not the space, time to vibrate only as a variable. This uniform phase can, without loss of optical energy, extends and shrinks, the twisting or bending. For this reason, as shown in Fig. 100 light enters from the upper surface with respect to the metamaterial, the metamaterial 100 does not change in phase is propagated at a constant phase (the phase velocity is set to infinity).
  • 出願人(英語)
  • ※2012年7月以前掲載分については米国以外のすべての指定国
  • IBARAKI UNIVERSITY
  • 発明者(英語)
  • SUZUKI TAKEHITO
国際特許分類(IPC)
指定国 National States: AE AG AL AM AO AT AU AZ BA BB BG BH BN BR BW BY BZ CA CH CL CN CO CR CU CZ DE DJ DK DM DO DZ EC EE EG ES FI GB GD GE GH GM GT HN HR HU ID IL IN IR IS KE KG KH KN KP KR KW KZ LA LC LK LR LS LU LY MA MD ME MG MK MN MW MX MY MZ NA NG NI NO NZ OM PA PE PG PH PL PT QA RO RS RU RW SA SC SD SE SG SK SL SM ST SV SY TH TJ TM TN TR TT TZ UA UG US UZ VC VN ZA ZM ZW
ARIPO: BW GH GM KE LR LS MW MZ NA RW SD SL SZ TZ UG ZM ZW
EAPO: AM AZ BY KG KZ RU TJ TM
EPO: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
OAPI: BF BJ CF CG CI CM GA GN GQ GW KM ML MR NE SN ST TD TG
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