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Proceedings Paper

Silicon photonic resonator for label-free bio-sensing application
Author(s): Suruk Udomsom; Ukrit Mankong; Nipon Theera-Umpon; Nattapol Ittipratheep; Toshimasa Umezawa; Atsushi Matsumoto; Naokatsu Yamamoto
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Paper Abstract

In medical diagnostics there is an increasing demand for biosensors that can specifically detect biological analytes in a fluid. Especially label-free sensing, consistings of a transducer with biorecognition molecules immobilized on its surface without relying on fluorescent dye. In this paper we study the design and fabrication of a silicon nanowire photonic ring resonator and its feasibility as a biosensor. We have simulated and fabricated racetrack ring resonators which have a few tenths of micrometer gap, up to 0.5 μm between the input / output waveguides and the resonators. It is found that the devices can be designed with large Q factors. Sensitivity to biomaterial detection has been simulated for antibody (goat anti-mouse IgG) - antigen (mouse IgG) using 3-dimensional Finite Difference Time Domain technique. The simulated results show that the ring resonator has a response 15 nm resonance shift per refractive index unit. Antibody coating method is also discussed in this paper which can be applied to other antibody-antigen types.

Paper Details

Date Published: 5 March 2018
PDF: 10 pages
Proc. SPIE 10714, Third International Conference on Photonics Solutions (ICPS2017), 107140T (5 March 2018); doi: 10.1117/12.2300961
Show Author Affiliations
Suruk Udomsom, Chiang Mai Univ. (Thailand)
Ukrit Mankong, Chiang Mai Univ. (Thailand)
National Institute of Information and Communications Technology (Japan)
Nipon Theera-Umpon, Chiang Mai Univ. (Thailand)
Nattapol Ittipratheep, Chiang Mai Univ. (Thailand)
Toshimasa Umezawa, National Institute of Information and Communications Technology (Japan)
Atsushi Matsumoto, National Institute of Information and Communications Technology (Japan)
Naokatsu Yamamoto, National Institute of Information and Communications Technology (Japan)


Published in SPIE Proceedings Vol. 10714:
Third International Conference on Photonics Solutions (ICPS2017)
Thawatchai Mayteevarunyoo, Editor(s)

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