Ekmel Ozbay et al 2007 J. Phys. D: Appl. Phys. 40 2652 doi:10.1088/0022-3727/40/9/S05
Ekmel Ozbay, Koray Aydin, Irfan Bulu and Kaan Guven
Show affiliationsWe 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.
42.70.Qs Photonic bandgap materials
Issue 9 (7 May 2007)
Received 14 July 2006, in final form 14 August 2006
Published 19 April 2007
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