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Optics Letters

Optics Letters


  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 15 — Aug. 1, 2014
  • pp: 4345–4348

Contra-directional coupling into slotted photonic crystals for spectrometric applications

Mark G. Scullion, Andrea Di Falco, and Thomas F. Krauss  »View Author Affiliations

Optics Letters, Vol. 39, Issue 15, pp. 4345-4348 (2014)

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We propose and demonstrate the concept of a contra-directional coupler between a W1 and a slotted photonic crystal waveguide. The bandwidth and operating wavelength of such a coupler can be controlled via its geometrical parameters, and power transfer is not periodic unlike in the more familiar codirectional case. Light of specific wavelengths can be extracted from the W1 mode into air slot modes using this design, with W1/slot coupling efficiencies of up to 99±1%, and waveguide extracted coupling efficiencies of up to 51±12% demonstrated experimentally. Combining several of these couplers in series, we demonstrate the spectral filtering functionality on-chip. The device therefore combines the well-known sensing function of the slotted waveguide geometry with the spectrometer function, thus uniting two essential biosensor functions in a monolithic device.

© 2014 Optical Society of America

OCIS Codes
(130.0130) Integrated optics : Integrated optics
(130.5296) Integrated optics : Photonic crystal waveguides
(130.7408) Integrated optics : Wavelength filtering devices

ToC Category:
Integrated Optics

Original Manuscript: April 25, 2014
Revised Manuscript: June 2, 2014
Manuscript Accepted: June 16, 2014
Published: July 18, 2014

Mark G. Scullion, Andrea Di Falco, and Thomas F. Krauss, "Contra-directional coupling into slotted photonic crystals for spectrometric applications," Opt. Lett. 39, 4345-4348 (2014)

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