Super-resolution for a point source using positive refraction

Miñano Dominguez, Juan Carlos; Benitez Gimenez, Pablo; Gonzalez Lopez, Juan Carlos; Grabovičkić, Dejan y Ahmadpanahi, Hammed (2012). Super-resolution for a point source using positive refraction. En: "Proceedings of SPIE. Metamaterials: Fundamentals and Applications V", 12/08/2012 - 16/08/2012, San Diego, California, USA. pp. 845511-8455112. https://doi.org/10.1117/12.929706.

Descripción

Título: Super-resolution for a point source using positive refraction
Autor/es:
  • Miñano Dominguez, Juan Carlos
  • Benitez Gimenez, Pablo
  • Gonzalez Lopez, Juan Carlos
  • Grabovičkić, Dejan
  • Ahmadpanahi, Hammed
Tipo de Documento: Ponencia en Congreso o Jornada (Artículo)
Título del Evento: Proceedings of SPIE. Metamaterials: Fundamentals and Applications V
Fechas del Evento: 12/08/2012 - 16/08/2012
Lugar del Evento: San Diego, California, USA
Título del Libro: Proceedings of SPIE. Metamaterials: Fundamentals and Applications V
Fecha: 2012
Volumen: 8455
Materias:
Palabras Clave Informales: Super-resolution, Perfect Imaging, Maxwell Fish Eye, Spherical Geodesic Waveguide, Perfect Drain
Escuela: E.T.S.I. Telecomunicación (UPM)
Departamento: Electrónica Física
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

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 λ/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 λ /3000, for the SGW loaded with the perfect drain, and up to λ /500 f 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.

Más información

ID de Registro: 19713
Identificador DC: http://oa.upm.es/19713/
Identificador OAI: oai:oa.upm.es:19713
Identificador DOI: 10.1117/12.929706
URL Oficial: http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=1381712
Depositado por: Memoria Investigacion
Depositado el: 15 Sep 2013 10:16
Ultima Modificación: 21 Abr 2016 20:57
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