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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 11 — May. 26, 2008
  • pp: 8306–8316

Giant birefringence in multi-slotted silicon nanophotonic waveguides

Shun-Hui Yang, Michael L. Cooper, Prabhakar R. Bandaru, and Shayan Mookherjea  »View Author Affiliations


Optics Express, Vol. 16, Issue 11, pp. 8306-8316 (2008)
http://dx.doi.org/10.1364/OE.16.008306


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Abstract

We demonstrate record giant birefringence, nearly twice as large as has previously been achieved (Δngroup=1.5 over more than 60 nm of bandwidth near λ=1550 nm) using a multi-slotted silicon nanophotonic waveguide. The birefringence is optimized by the use of materials with high refractive index contrast to create a compact single-mode waveguide, and the etching of deeply sub-wavelength channels within the waveguide, which are strongly coupled in the near field and separated by narrow air channels of optimimum lateral width. When used as a polarization-selective delay element, the delay-bandwidth product per unit length is 46.6/mm over a bandwidth of 8.74 THz. We also design and demonstrate mode shaping of both the TE and TM polarizations to achieve near-identical coupling to a macroscopic external object, such as a lensed fiber or detector.

© 2008 Optical Society of America

OCIS Codes
(130.2790) Integrated optics : Guided waves
(230.7380) Optical devices : Waveguides, channeled
(050.2555) Diffraction and gratings : Form birefringence
(130.5440) Integrated optics : Polarization-selective devices

ToC Category:
Integrated Optics

History
Original Manuscript: April 21, 2008
Revised Manuscript: May 20, 2008
Manuscript Accepted: May 20, 2008
Published: May 22, 2008

Citation
Shun-Hui Yang, Michael L. Cooper, Prabhakar R. Bandaru, and Shayan Mookherjea, "Giant birefringence in multi-slotted silicon nanophotonic waveguides," Opt. Express 16, 8306-8316 (2008)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-16-11-8306


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