Temperature-independent silicon subwavelength grating waveguides

We 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 posi...

Full description

Saved in:
Bibliographic Details
Published inOptics letters Vol. 36; no. 11; p. 2110
Main Authors Schmid, J H, Ibrahim, M, Cheben, P, Lapointe, J, Janz, S, Bock, P J, Densmore, A, Lamontagne, B, Ma, R, Ye, W N, Xu, D-X
Format Journal Article
LanguageEnglish
Published United States 01.06.2011
Online AccessGet more information

Cover

More Information
Summary:We 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 1550 nm 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.
ISSN:1539-4794
DOI:10.1364/OL.36.002110