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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 37, Iss. 17 — Sep. 1, 2012
  • pp: 3717–3719

Toward low-loss photonic crystal waveguides in InP/InGaAsP heterostructures

Peter Kaspar, Roman Kappeler, Heinz Jäckel, and Christian Hafner  »View Author Affiliations

Optics Letters, Vol. 37, Issue 17, pp. 3717-3719 (2012)

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Line-defect photonic crystal waveguides exhibit severe propagation losses if they are implemented in semiconductor heterostructures with a weak refractive index contrast. We present, for what we believe is the first time, experimental structures for which we have evidence that fabrication imperfections are not the limiting factor in terms of propagation losses. We demonstrate a loss figure of 335±5dB/cm, which is an improvement by a factor of about 2 with respect to state-of-the-art values. Simulations show that even lower losses can be obtained with different waveguide geometries. In other words, the dominant loss mechanism is related to the waveguide design, and losses are not expected to decrease upon further optimization of the fabrication process.

© 2012 Optical Society of America

OCIS Codes
(130.3120) Integrated optics : Integrated optics devices
(160.6000) Materials : Semiconductor materials
(230.7370) Optical devices : Waveguides
(220.4241) Optical design and fabrication : Nanostructure fabrication
(130.5296) Integrated optics : Photonic crystal waveguides
(160.5298) Materials : Photonic crystals

ToC Category:
Optical Devices

Original Manuscript: June 8, 2012
Revised Manuscript: July 30, 2012
Manuscript Accepted: July 30, 2012
Published: August 31, 2012

Peter Kaspar, Roman Kappeler, Heinz Jäckel, and Christian Hafner, "Toward low-loss photonic crystal waveguides in InP/InGaAsP heterostructures," Opt. Lett. 37, 3717-3719 (2012)

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