Scenarios of non-resonant far-field subwavelength imaging by a simple glass microsphere

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Abstract

A hypothesis that a simple glass microsphere excited by a point dipole located on its surface or in its close proximity creates an imaging beam in some sense similar to that created by a metamaterial hyperlens found the confirmation in our numerical simulations. The imaging beam can be created either by creeping waves or simply by rays emitted by the object refracting on the back side of the sphere. The first mechanism of imaging can be implemented by glass microspheres of modest sizes, corresponds to the coherent imaging and demands the lateral coherent illumination. The second and most important mechanism can be implemented by microspheres of larger sizes. It corresponds to the non-coherent non-resonant imaging. In this case we envisage several scenarios of the imaging. One of them corresponds to the case experimentally implemented by the group of M. Hong in 2011, and other scenarios still need an experimental check. In our COMSOL simulations we checked these scenarios partially, but one of them was implemented completely and the resolution about λ/4 in far fields was numerically demonstrated.
Original languageEnglish
Title of host publication2021 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems, COMCAS 2021
PublisherIEEE
Pages234-237
Number of pages4
ISBN (Electronic)9780738146720
ISBN (Print)978-1-6654-1147-9
DOIs
Publication statusPublished - 3 Nov 2021
MoE publication typeA4 Article in a conference publication
EventIEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems - Tel Aviv, Israel
Duration: 1 Nov 20213 Nov 2021

Conference

ConferenceIEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems
Abbreviated titleCOMCAS
Country/TerritoryIsrael
CityTel Aviv
Period01/11/202103/11/2021

Keywords

  • Microwave antennas
  • Surface waves
  • Superresolution
  • Imaging
  • Glass
  • Optical imaging
  • Numerical simulation

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