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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 21 — Oct. 11, 2010
  • pp: 22283–22298

Unidirectional transmission in photonic-crystal gratings at beam-type illumination

Atilla Ozgur Cakmak, Evrim Colak, Andriy E. Serebryannikov, and Ekmel Ozbay  »View Author Affiliations


Optics Express, Vol. 18, Issue 21, pp. 22283-22298 (2010)
http://dx.doi.org/10.1364/OE.18.022283


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Abstract

Unidirectional transmission is studied theoretically and experimentally for the gratings with one-side corrugations (non-symmetric gratings), which are based on two-dimensional photonic crystals composed of alumina rods. The unidirectional transmission appears at a fixed angle of incidence as a combined effect of the peculiar dispersion features of the photonic crystal and the properly designed corrugations. It is shown that the basic unidirectional transmission characteristics, which are observed at a plane-wave illumination, are preserved at Gaussian-beam and horn antenna illuminations. The main attention is paid to the single-beam unidirectional regime, which is associated with the strong directional selectivity arising due to the first negative diffraction order. An additional degree of freedom for controlling the transmission of the electromagnetic waves is obtained by making use of the asymmetric corrugations at the photonic crystal interface.

© 2010 OSA

OCIS Codes
(050.7330) Diffraction and gratings : Volume gratings
(120.7000) Instrumentation, measurement, and metrology : Transmission
(260.1960) Physical optics : Diffraction theory
(260.2110) Physical optics : Electromagnetic optics
(230.5298) Optical devices : Photonic crystals

ToC Category:
Photonic Crystals

History
Original Manuscript: August 16, 2010
Revised Manuscript: September 23, 2010
Manuscript Accepted: September 27, 2010
Published: October 6, 2010

Citation
Atilla Ozgur Cakmak, Evrim Colak, Andriy E. Serebryannikov, and Ekmel Ozbay, "Unidirectional transmission in photonic-crystal gratings at beam-type illumination," Opt. Express 18, 22283-22298 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-21-22283


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