Negative refraction and imaging beyond the diffraction limit by a two-dimensional left-handed metamaterial

Ekmel Ozbay*, Koray Aydin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

We report our experimental results on two-dimensional left-handed metamaterials (LHM) exhibiting negative refraction and subwavelength imaging. Transmission and reflection spectra of LHM are studied and a left-handed transmission band is observed at the frequencies where both dielectric permittivity and magnetic permeability are negative. Impedance matching is verified both with the experiments and simulations. The two-dimensional LHM structure is verified to have a negative refractive index. We employed three different methods to observe negative refraction; refraction through prism-shaped LHM, beam shifting method, and phase shift experiments. We further demonstrated subwavelength imaging and resolution using LHM superlenses. The effect of thickness on the resolving power is investigated experimentally.

Original languageEnglish (US)
Pages (from-to)108-115
Number of pages8
JournalPhotonics and Nanostructures - Fundamentals and Applications
Volume6
Issue number1
DOIs
StatePublished - Apr 2008

Keywords

  • Left-handed material
  • Metamaterial
  • Negative refraction
  • Subwavelength imaging
  • Superlens

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Hardware and Architecture
  • Electrical and Electronic Engineering

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