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This paper describes the investigation of the waveguide properties of a silicon-on-insulator (SOI)-based two-dimensional photonic-crystal slab. It is found that coupling between transverse-electric (TE)-like defect modes and transverse-magnetic (TM)-like slab modes occurs in some frequency range due to structural asymmetries in the vertical direction. This TE-TM coupling, together with the smaller refractive-index contrast between the slab and dielectric cladding, results in propagation losses for a line-defect waveguide in an SOI structure. The paper also presents optimization methods for obtaining a wide lossless propagation band using such a line defect.
Published in:
Lightwave Technology, Journal of
(Volume:22
,
Issue:
12
)
Date of Publication: Dec. 2004
- Page(s):
- 2787 - 2792
- ISSN :
- 0733-8724
- INSPEC Accession Number:
- 8340468
- Digital Object Identifier :
- 10.1109/JLT.2004.833290
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 13 December 2004
- Issue Date :
- Dec. 2004
- Sponsored by :
- IEEE Aerospace and Electronic Systems Society
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