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Permanent link (DOI): https://doi.org/10.7939/R3ST1N

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Light Propagation and Photothermal Nonlinearity in Graphene-Si Waveguides Open Access

Descriptions

Other title
Subject/Keyword
photothermal
graphene
photonics
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Horvath, Cameron S.
Supervisor and department
Van, Vien (Electrical and Computer Engineering)
Examining committee member and department
Thundat, Thomas (Chemical and Materials Engineering)
Jacob, Zubin (Electrical and Computer Engineering)
Department
Department of Electrical and Computer Engineering
Specialization
Photonics and Plasmas
Date accepted
2013-09-26T14:43:27Z
Graduation date
2013-11
Degree
Master of Science
Degree level
Master's
Abstract
This thesis involves the study of light propagation and photothermal nonlinearity in graphene-silicon waveguides. Graphene, a two-dimensional monolayer of carbon atoms, is attracting a significant amount of interest due to its unique optical properties and its ability to be integrated with existing waveguiding materials such as silicon. Useful graphene photonic devices such as polarizers, modulators and couplers have been demonstrated in literature so far. Photolithographic patterning techniques that allow for graphene patterning to occur on photonic devices before and after their on-chip realization were developed. Numerical simulations were performed that model the propagation loss and ohmic self-heating in graphene-silicon waveguides. A graphene-silicon waveguide was realized by transferring graphene onto a pre-existing silicon Fabry-Perot waveguide resonator. The linear propagation loss and photothermal nonlinearity of the material system was investigated and compared to a bare silicon waveguide. An 8.8-fold enhancement in the effective thermal nonlinear index was observed.
Language
English
DOI
doi:10.7939/R3ST1N
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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