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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 8 — Apr. 11, 2011
  • pp: 7120–7126

Direct slow-light excitation in photonic crystal waveguides forming ultra-compact splitters

Min Zhang, Nathaniel Groothoff, Asger Christian Krüger, Peixing Shi, and Martin Kristensen  »View Author Affiliations

Optics Express, Vol. 19, Issue 8, pp. 7120-7126 (2011)

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Based on a series of 1x2 beam splitters, novel direct excitation of slow-light from input- to output-region in photonic crystal waveguides is investigated theoretically and experimentally. The study shows that the slow-light excitation provides over 50 nm bandwidth for TE-polarized light splitting between two output ports, and co-exists together with self-imaging leading to ~20 nm extra bandwidth. The intensity of the direct excitation is qualitatively explained by the overlap integral of the magnetic fields between the ground input- and excited output-modes. The direct excitation of slow light is practically lossless compared with transmission in a W1 photonic crystal waveguides, which broadens the application-field for slow-light and further minimizes the size of a 1x2 splitter.

© 2011 OSA

OCIS Codes
(230.7390) Optical devices : Waveguides, planar
(130.5296) Integrated optics : Photonic crystal waveguides

ToC Category:
Slow and Fast Light

Original Manuscript: February 22, 2011
Revised Manuscript: March 24, 2011
Manuscript Accepted: March 25, 2011
Published: March 30, 2011

Min Zhang, Nathaniel Groothoff, Asger Christian Krüger, Peixing Shi, and Martin Kristensen, "Direct slow-light excitation in photonic crystal waveguides forming ultra-compact splitters," Opt. Express 19, 7120-7126 (2011)

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