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" Hybrid Silicon-organic Augmented Low Index Guiding Waveguides for Nonlinear Optics "
Darcie, Todd
Aitchison, J. Stewart
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Latin Dissertation
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English
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| Record Number
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1053871
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TL52988
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| Main Entry
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Darcie, Todd
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Hybrid Silicon-organic Augmented Low Index Guiding Waveguides for Nonlinear Optics\ Darcie, ToddAitchison, J. Stewart
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| College
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University of Toronto (Canada)
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| Date
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2020
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| Degree
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M.A.S.
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2020
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| Note
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125 p.
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| Abstract
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Silicon-on-insulator (SOI) has emerged as a versatile and economical platform for a variety of nano-photonic devices and applications. However, it has many intrinsic limitations. Within nonlinear optics, two-photon absorption and the resultant free carrier effects severely limit the power and speed of Kerr-effect processes. These problems can be circumvented by designing hybrid structures which integrate organic materials with more favorable properties. These strategies rely on the waveguide’s ability to guide light in the low refractive index region of index high contrast silicon waveguides. While several structures such as slot and hybrid plasmonic waveguides have been explored for this purpose, these approaches suffer from high loss, high fabrication complexity or poor optical confinement. In this thesis we design, fabricate and test hybrid silicon-organic waveguides based on the augmented low index guiding (ALIG) principle introduced by Alam et al [1]. In the ALIG structure the transverse magnetic (TM) mode is mostly confined to the low-index organic region while the transverse electric (TE) mode is primarily confined to the high index silicon core. Compared to the slot structure, we find that the ALIG design can achieve higher confinement to the organic material and lower loss. Beyond χ 3 nonlinear optics, this approach can be extended to other materials which add other functionality such as biosensing, electro and magneto-optics, and gain on chip.
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Materials science
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Optics
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Aitchison, J. Stewart
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University of Toronto (Canada)
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