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Memorias de investigación
Communications at congresses:
Super-resolution for a point source using positive refraction
Year:2012
Research Areas
  • Engineering
Information
Abstract
Leonhardt demonstrated (2009) that the 2D Maxwell Fish Eye lens (MFE) can focus perfectly 2D Helmholtz waves of arbitrary frequency, i.e., it can transport perfectly an outward (monopole) 2D Helmholtz wave field, generated by a point source, towards a receptor called ?perfect drain? (PD) located at the corresponding MFE image point. The PD has the property of absorbing the complete radiation without radiation or scattering and it has been claimed as necessary to obtain super-resolution (SR) in the MFE. However, a prototype using a ?drain? different from the PD has shown ?/5 resolution for microwave frequencies (Ma et al, 2010). Recently, the SR properties of a device equivalent to the MFE, called the Spherical Geodesic Waveguide (SGW) (Miñano et al, 2012) have been analyzed. The reported results show resolution up to ? /3000, for the SGW loaded with the perfect drain, and up to ? /500 for the SGW without perfect drain. The perfect drain was realized as a coaxial probe loaded with properly calculated impedance. The SGW provides SR only in a narrow band of frequencies close to the resonance Schumann frequencies. Here we analyze the SGW loaded with a small ?perfect drain region? (González et al, 2011). This drain is designed as a region made of a material with complex permittivity. The comparative results show that there is no significant difference in the SR properties for both perfect drain designs.
International
Si
Congress
Fundamentals and Applications V Metamaterials
960
Place
San Diego, CA, USA
Reviewers
Si
ISBN/ISSN
0819491721
10.1117/12.929706
Start Date
12/08/2012
End Date
16/08/2012
From page
84551
To page
8455112
Proceedings of SPIE Volume 8455 (84551K)
Participants
  • Autor: Juan Carlos Miñano Dominguez (UPM)
  • Autor: Pablo Benitez Gimenez (UPM)
  • Autor: Juan Carlos Gonzalez Lopez (UPM)
  • Autor: Dejan Grabovickic . (UPM)
  • Autor: Hamed Ahmadpanaih . (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Ingeniería Óptica
  • Centro o Instituto I+D+i: Centro de Domótica Integral, CEDINT
  • Departamento: Electrónica Física
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