English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Leonhardt demonstrated (2009) that the 2D Maxwell Fish Eye lens (MFE) canperfectly focus 2D Helmholtz waves of arbitrary frequency, i.e., it canperfectly transport an outward (monopole) 2D Helmholtz wave field, generated bya point source, towards a "perfect point drain" located at the correspondingimage point. Moreover, a prototype with \lambda/5 super-resolution property forone microwave frequency has been manufactured and tested (Ma et al, 2010).However, software simulations or experimental measurements for a broad band offrequencies have not been reported. Here we present simulations with anon-perfect drain for a device equivalent to the MFE, called the SphericalGeodesic Waveguide (SGW), that predict up to \lambda/500 super-resolution closeto discrete frequencies. These frequencies are directly connected with thewell-known Schumann resonance frequencies of spherical symmetric systems. Outof these frequencies, the SGW does not show super-resolution in the analysisperformed.

Super-resolution for a point source better than {\lambda}/500 using positive refraction