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Proceedings Paper

Silicon photonic resonator sensors and devices
Author(s): Lukas Chrostowski; Samantha Grist; Jonas Flueckiger; Wei Shi; Xu Wang; Eric Ouellet; Han Yun; Mitch Webb; Ben Nie; Zhen Liang; Karen C. Cheung; Shon A. Schmidt; Daniel M. Ratner; Nicolas A. F. Jaeger
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Paper Abstract

Silicon photonic resonators, implemented using silicon-on-insulator substrates, are promising for numerous applications. The most commonly studied resonators are ring/racetrack resonators. We have fabricated these and other resonators including disk resonators, waveguide-grating resonators, ring resonator reflectors, contra-directional grating-coupler ring resonators, and racetrack-based multiplexer/demultiplexers. While numerous resonators have been demonstrated for sensing purposes, it remains unclear as to which structures provide the highest sensitivity and best limit of detection; for example, disc resonators and slot-waveguide-based ring resonators have been conjectured to provide an improved limit of detection. Here, we compare various resonators in terms of sensor metrics for label-free bio-sensing in a micro-fluidic environment. We have integrated resonator arrays with PDMS micro-fluidics for real-time detection of biomolecules in experiments such as antigen-antibody binding reaction experiments using Human Factor IX proteins. Numerous resonators are fabricated on the same wafer and experimentally compared. We identify that, while evanescent-field sensors all operate on the principle that the analyte's refractive index shifts the resonant frequency, there are important differences between implementations that lie in the relationship between the optical field overlap with the analyte and the relative contributions of the various loss mechanisms. The chips were fabricated in the context of the CMC-UBC Silicon Nanophotonics Fabrication course and workshop. This yearlong, design-based, graduate training program is offered to students from across Canada and, over the last four years, has attracted participants from nearly every Canadian university involved in photonics research. The course takes students through a full design cycle of a photonic circuit, including theory, modelling, design, and experimentation.

Paper Details

Date Published: 6 February 2012
PDF: 16 pages
Proc. SPIE 8236, Laser Resonators, Microresonators, and Beam Control XIV, 823620 (6 February 2012); doi: 10.1117/12.916860
Show Author Affiliations
Lukas Chrostowski, The Univ. of British Columbia (Canada)
Samantha Grist, The Univ. of British Columbia (Canada)
Jonas Flueckiger, The Univ. of British Columbia (Canada)
Wei Shi, The Univ. of British Columbia (Canada)
Xu Wang, The Univ. of British Columbia (Canada)
Eric Ouellet, The Univ. of British Columbia (Canada)
Han Yun, The Univ. of British Columbia (Canada)
Mitch Webb, The Univ. of British Columbia (Canada)
Ben Nie, The Univ. of British Columbia (Canada)
Zhen Liang, The Univ. of British Columbia (Canada)
Karen C. Cheung, The Univ. of British Columbia (Canada)
Shon A. Schmidt, Univ. of Washington (United States)
Daniel M. Ratner, Univ. of Washington (United States)
Nicolas A. F. Jaeger, The Univ. of British Columbia (Canada)

Published in SPIE Proceedings Vol. 8236:
Laser Resonators, Microresonators, and Beam Control XIV
Alexis V. Kudryashov; Alan H. Paxton; Vladimir S. Ilchenko, Editor(s)

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