Co-polymer clad design for high performance athermal photonic circuits
Author(s)Raghunathan, Vivek; Xu, Jingjing; Michel, Jurgen; Gleason, Karen K.; Kimerling, Lionel C.; Yague, Jose Luis; ... Show more Show less
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Ubiquitous, low power consumption and high bandwidth density communication will require passive athermal optical filters for WDM transceivers in Si-CMOS architecture. Two silicon-polymer composite structures, deposited using initiated chemical vapor deposition (iCVD), poly(perfluorodecyl acrylate) (pPFDA) and poly(perfluorodecyl acrylate-co-divinyl benzene) p(PFDA-co-DVB), are analyzed as candidates for thermal compensation. The addition of DVB to a fluorinated acrylate backbone reduces the C-F bond density, increases the density in the copolymer and thereby increases refractive index. The addition of DVB also increases the volume expansion coefficient of the copolymer, resulting in an increased thermo-optic (TO) coefficient for the copolymer system. The increased index and TO coefficient of the co-polymer gives improved bend loss, footprint and FSR performance for athermal silicon photonic circuits.
DepartmentMassachusetts Institute of Technology. Materials Processing Center; Massachusetts Institute of Technology. Department of Chemical Engineering; Massachusetts Institute of Technology. Department of Materials Science and Engineering; Massachusetts Institute of Technology. Microphotonics Center
Optical Society of America
Raghunathan, Vivek et al. “Co-polymer Clad Design for High Performance Athermal Photonic Circuits.” Optics Express 20.19 (2012): 20808. © 2012 OSA
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