Negative refraction, subwavelength focusing and beam formation by photonic crystals

Ekmel Ozbay*, Koray Aydin, Irfan Bulu, Kaan Guven

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

14 Scopus citations


We present a review of our experimental and numerical studies on the negative refraction related phenomena in two-dimensional dielectric photonic crystals (PCs). By employing photonic bands with appropriate dispersion, the propagation of the electromagnetic wave through a PC can be controlled to a large extent, and diverse and completely novel electromagnetic phenomena can be generated. We perform the spectral analysis of the negative refraction arising from a convex TM polarized photonic band of a hexagonal PC. As a consequence of negative refraction, we demonstrate a photonic crystal flat lens, which has the ability to focus electromagnetic waves and provide subwavelength resolution laterally. Finally, a photonic crystal with an embedded source is shown to provide a highly directional beam, which can be utilized in certain antenna applications.

Original languageEnglish (US)
Article numberS05
Pages (from-to)2652-2658
Number of pages7
JournalJournal of Physics D: Applied Physics
Issue number9
StatePublished - May 7 2007

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films


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