title: Athermal Silicon-on-insulator ring resonators by overlaying a polymer cladding on narrowed waveguides.
abstract: Athermal silicon ring resonators are experimentally demonstrated by overlaying a polymer cladding on narrowed silicon wires. The ideal width to achieve athermal condition for the TE mode of 220 nm-height SOI waveguides is found to be around 350 nm. After overlaying a polymer layer, the wavelength temperature dependence of the silicon ring resonator is reduced to less than 5 pm/degrees C, almost eleven times less than that of normal silicon waveguides. The optical loss of a 350-nm bent waveguide (with a radius of 15 microm) is extracted from the ring transmission spectrum. The scattering loss is reduced to an acceptable level of about 50 dB/cm after overlaying a polymer cladding.
authors.affiliation: Photonics Research Group, INTEC-department, Ghent University-IMEC, Ghent, B-9000, Belgium. jteng@intec.ugent.be
authors.forename: Jie
authors.initials: J
authors.lastname: Teng
authors.forename: Pieter
authors.initials: P
authors.lastname: Dumon
authors.forename: Wim
authors.initials: W
authors.lastname: Bogaerts
authors.forename: Hongbo
authors.initials: H
authors.lastname: Zhang
authors.forename: Xigao
authors.initials: X
authors.lastname: Jian
authors.forename: Xiuyou
authors.initials: X
authors.lastname: Han
authors.forename: Mingshan
authors.initials: M
authors.lastname: Zhao
authors.forename: Geert
authors.initials: G
authors.lastname: Morthier
authors.forename: Roel
authors.initials: R
authors.lastname: Baets
mesh_terms: D004867:Equipment Design; D005336:Fiber Optic Technology; D055100:Optical Fibers; D055095:Optics and Photonics; D011108:Polymers / Q000737:chemistry*; D012031:Refractometry; D012542:Scattering, Radiation; D012825:Silicon / Q000737:chemistry*; D013053:Spectrophotometry / Q000379:methods; D013499:Surface Properties; D013696:Temperature; D014466:Ultraviolet Rays
chemical_list: D011108:Polymers; D012825:Silicon