Subwavelength resolution in a two-dimensional photonic-crystal-based superlens

E. Cubukcu, K. Aydin, E. Ozbay*, S. Foteinopolou, C. M. Soukoulis

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

377 Scopus citations

Abstract

We experimentally and theoretically demonstrate single-beam negative refraction and superlensing in the valence band of a two-dimensional photonic crystal operating in the microwave regime. By measuring the refracted electromagnetic waves from a slab shaped photonic crystal, we find a refractive index of [Formula presented] that is very close to the theoretical value of [Formula presented]. A scanning transmission measurement technique is used to measure the spatial power distribution of the focused electromagnetic waves that radiate from a point source. The full width at half maximum of the focused beam is measured to be [Formula presented], which is in good agreement with the finite difference time domain method simulations. We also report a subwavelength resolution for the image of two incoherent point sources, which are separated by a distance of [Formula presented].

Original languageEnglish (US)
JournalPhysical review letters
Volume91
Issue number20
DOIs
StatePublished - 2003

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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