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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 20 — Sep. 24, 2012
  • pp: 22555–22562

Angular bandpass filters based on dielectric resonant waveguide gratings

Stefan Steiner, Stefanie Kroker, Thomas Käsebier, Ernst-Bernhard Kley, and Andreas Tünnermann  »View Author Affiliations

Optics Express, Vol. 20, Issue 20, pp. 22555-22562 (2012)

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We report on a novel concept for transmissive optical elements based on resonant waveguide gratings (RWGs), which enables the realization of direction selective filters. Hereby, the broadband reflectivity of an RWG for nearly normal incidence angles is combined with high diffractive efficiency in transmission for a specific angle of incidence. Silicon is used as material with high refractive index and good compatibility with semiconductor fabrication. By adjusting the grating parameters different transmission angles and angular widths of the transmission range are feasible. First experimental results of the introduced filters provide a high transmission up to 63% at an incidence angle of 45° with a full width at half maximum of 20°.

© 2012 OSA

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(050.2770) Diffraction and gratings : Gratings
(220.4000) Optical design and fabrication : Microstructure fabrication
(230.3990) Optical devices : Micro-optical devices
(050.6624) Diffraction and gratings : Subwavelength structures

ToC Category:
Diffraction and Gratings

Original Manuscript: June 26, 2012
Revised Manuscript: August 23, 2012
Manuscript Accepted: August 23, 2012
Published: September 17, 2012

Stefan Steiner, Stefanie Kroker, Thomas Käsebier, Ernst-Bernhard Kley, and Andreas Tünnermann, "Angular bandpass filters based on dielectric resonant waveguide gratings," Opt. Express 20, 22555-22562 (2012)

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