Temperature-independent silicon subwavelength grating waveguides

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DOIResolve DOI: http://doi.org/10.1364/OL.36.002110
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TypeArticle
Journal titleOptics Letters
ISSN0146-9592
Volume36
Issue11
Pages21102112; # of pages: 3
SubjectBloch modes; Duty ratios; Material coefficients; Numerical calculation; Orders of magnitude; Periodic composites; Silicon photonics; Silicon waveguide; SU-8 polymer; Sub-wave length grating; Temperature dependence; Thermooptics; TO effect; Polymers; Waveguides
AbstractWe demonstrate, by experiment and numerical calculations, temperature-independent subwavelength grating waveguides with a periodic composite core composed of alternating regions of silicon and SU-8 polymer. The polymer has a negative thermo-optic (TO) material coefficient that cancels the large positive TO effect of the silicon. Measurements and Bloch mode calculations were carried out over a range of silicon-polymer duty ratios. The lowest measured TO coefficient at a wavelength of 1550nm is 1:8 × 10 -6 K-1; 2 orders of magnitude smaller than a conventional silicon photonic wire waveguide. Calculations predict the possibility of complete cancellation of the silicon waveguide temperature dependence. © 2011 Optical Society of America.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Institute for Microstructural Sciences
Peer reviewedYes
NPARC number21271192
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Record identifierd0420c57-8cb6-4821-afca-4512daa4661b
Record created2014-03-24
Record modified2016-05-09
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