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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 27 — Sep. 20, 2011
  • pp: 5256–5262

Manipulating wavelength-selective emission with heterogeneous photonic crystals

Hamza Kurt  »View Author Affiliations

Applied Optics, Vol. 50, Issue 27, pp. 5256-5262 (2011)

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The usual near-field radiation profile of a light beam emanating from a photonic crystal waveguide (PCW) has a main lobe at the center line of the waveguide. However, a centrally symmetric profile for the emission pattern with two sidelobes can be required in some applications, e.g., Y-type power dividers, wavelength multiplexers, and semiconductor lasers. With such motivations in mind, we present the design of a compact structure that deflects the beam propagation direction in this manner. The idea utilizes the manipulation of the dispersion diagram of cascaded photonic crystals by exploiting the bandgap and self-collimation properties. The waveguide mode in the PCW can be transformed from a propagating mode into a diffusive one by altering the filling factor, which, in turn, leads to off-axis light emission. By using the finite-difference time-domain method, we show that the emission takes place into free space at the inclined output surfaces of the PCW with deviation angles of ± 45 ° .

© 2011 Optical Society of America

OCIS Codes
(230.1360) Optical devices : Beam splitters
(130.5296) Integrated optics : Photonic crystal waveguides
(230.5298) Optical devices : Photonic crystals
(230.7408) Optical devices : Wavelength filtering devices

ToC Category:
Integrated Optics

Original Manuscript: June 6, 2011
Revised Manuscript: August 8, 2011
Manuscript Accepted: August 8, 2011
Published: September 14, 2011

Hamza Kurt, "Manipulating wavelength-selective emission with heterogeneous photonic crystals," Appl. Opt. 50, 5256-5262 (2011)

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