Title :
Athermalizing and Trimming of Slotted Silicon Microring Resonators With UV-Sensitive PMMA Upper-Cladding
Author :
Zhou, Linjie ; Okamoto, Katsunari ; Yoo, S.J.B.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of California, Davis, CA, USA
Abstract :
This letter experimentally demonstrates significant reduction in the resonance thermal sensitivity of the slotted silicon microring resonators by exploiting polymethyl methacrylate (PMMA) as upper-cladding. We investigate the resonance temperature dependence on the slot width with and without PMMA upper-cladding. The experimental results show that the temperature dependence is reduced from 91 pm/degC for a regular microring resonator to 27 pm/degC for the PMMA-clad slotted microring resonator. The ultraviolet (UV) sensitive PMMA upper-cladding also allows the resonance wavelengths of slotted microring resonators shift by 0.5 nm under UV light trimming. With the demonstrated schemes, each individual optical component can be athermalized and precisely registered to standard wavelengths for a future multiwavelength optically interconnected computing system-on-a-chip.
Keywords :
elemental semiconductors; micro-optomechanical devices; micromechanical resonators; optical resonators; silicon; system-on-chip; thermo-optical effects; ultraviolet spectra; Si; UV light trimming; optical component athermalization; polymethyl methacrylate; resonance thermal sensitivity reduction; slot width; slotted silicon microring resonator; system-on-a-chip; ultraviolet sensitive PMMA upper-cladding; wavelength 0.5 nm; Integrated photonic devices; microring resonators; silicon photonics; slotted waveguides; wavelength-division multiplexing;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2009.2023522
