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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 24 — Nov. 19, 2012
  • pp: 26636–26648

Spoof-plasmon relevant one-way collimation and multiplexing at beaming from a slit in metallic grating

Semih Cakmakyapan, Andriy E. Serebryannikov, Humeyra Caglayan, and Ekmel Ozbay  »View Author Affiliations


Optics Express, Vol. 20, Issue 24, pp. 26636-26648 (2012)
http://dx.doi.org/10.1364/OE.20.026636


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Abstract

Diode and collimator/multiplexer functions are suggested to be combined in one device that is based on a thin metallic grating with a single subwavelength slit. A proper choice of the structural (a)symmetry of the grating can result in obtaining one-way collimation and multiplexing with a single on-axis or off-axis, or two off-axis narrow outgoing beams. It is possible due to freedom in utilizing different combinations of the excitation conditions of the spoof surface plasmons at the four grating parts – right and left front-side and right and left back-side ones. Such a combining provides one with an efficient tool to engineer one-way collimators and multiplexers with the desired characteristics. Strong asymmetry in transmission with respect to the incidence direction (forward vs backward case) can be obtained within a wide range of variation of the incident beam parameters, i.e., angle of incidence and frequency, while the outgoing radiation is concentrated within a narrow range of the observation angle variation. Most of the observed asymmetric transmission features can be qualitatively explained using the concept of the equivalent source placed inside the slit.

© 2012 OSA

OCIS Codes
(050.1220) Diffraction and gratings : Apertures
(050.1950) Diffraction and gratings : Diffraction gratings
(120.1680) Instrumentation, measurement, and metrology : Collimation
(120.7000) Instrumentation, measurement, and metrology : Transmission
(240.6690) Optics at surfaces : Surface waves

ToC Category:
Diffraction and Gratings

History
Original Manuscript: August 22, 2012
Revised Manuscript: September 29, 2012
Manuscript Accepted: November 1, 2012
Published: November 12, 2012

Citation
Semih Cakmakyapan, Andriy E. Serebryannikov, Humeyra Caglayan, and Ekmel Ozbay, "Spoof-plasmon relevant one-way collimation and multiplexing at beaming from a slit in metallic grating," Opt. Express 20, 26636-26648 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-24-26636


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