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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 19 — Jul. 1, 2009
  • pp: 3722–3730

Photonic crystal lens for coupling two waveguides

Margarita I. Kotlyar, Yanis R. Triandaphilov, Alexey A. Kovalev, Victor A. Soifer, Maria V. Kotlyar, and Lim O’Faolain  »View Author Affiliations


Applied Optics, Vol. 48, Issue 19, pp. 3722-3730 (2009)
http://dx.doi.org/10.1364/AO.48.003722


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Abstract

We report the design, fabrication, and characterization of a new nanophotonic device comprising a two-dimensional photonic crystal (PhC) lens of size 3 × 4 μm fabricated in silicon-on-insulator. The PhC lens is put at the output of a planar waveguide of width 4.5 μm to couple light into a planar waveguide of width 1 μm , with two waveguides being of length 5 mm . A 1 μm off-axis displacement of the smaller waveguide leads to an 8-fold reduction of output light intensity, which means that the focal spot size at output of the PhC lens in silicon is less than 1 μm . The simulation has shown that the PhC lens has maximal transmittance at 1.55 μm , with the coupling efficiency being 73%. The focal spot size of the lens in air calculated at the FWHM is 0.32 λ (where λ is the wavelength).

© 2009 Optical Society of America

OCIS Codes
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.1810) Fiber optics and optical communications : Buffers, couplers, routers, switches, and multiplexers
(130.0130) Integrated optics : Integrated optics
(130.5296) Integrated optics : Photonic crystal waveguides

ToC Category:
Integrated Optics

History
Original Manuscript: December 17, 2008
Revised Manuscript: April 8, 2009
Manuscript Accepted: May 31, 2009
Published: June 23, 2009

Citation
Margarita I. Kotlyar, Yanis R. Triandaphilov, Alexey A. Kovalev, Victor A. Soifer, Maria V. Kotlyar, and Liam O'Faolain, "Photonic crystal lens for coupling two waveguides," Appl. Opt. 48, 3722-3730 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-19-3722

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