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Proceedings Paper

Enhanced surface sensitivity in microring resonator biosensor based on subwavelength grating waveguides
Author(s): Hai Yan; Lijun Huang; Xiaochuan Xu; Naimei Tang; Swapnajit Chakravarty; Ray T. Chen
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Paper Abstract

Microring resonators on silicon-on-insulator substrate have been demonstrated to be promising in sensing applications. We study a microring resonator biosensor based on a novel subwavelength grating (SWG) waveguide structure, which consists of periodic silicon pillars in the propagation direction with a subwavelength period. In this structure, effective sensing region includes not only the top and side of the waveguide, but also the space in between the silicon pillars which is on the path of the propagation mode. This leads to greatly increased bulk refractive index sensitivity as well as extended surface sensing region with constantly high surface sensitivity.

Paper Details

Date Published: 23 February 2017
PDF: 7 pages
Proc. SPIE 10081, Frontiers in Biological Detection: From Nanosensors to Systems IX, 100810G (23 February 2017); doi: 10.1117/12.2250408
Show Author Affiliations
Hai Yan, The Univ. of Texas at Austin (United States)
Lijun Huang, The Univ. of Texas at Austin (United States)
Beijing Univ. of Posts and Telecommunications (China)
Xiaochuan Xu, Omega Optics, Inc. (United States)
Naimei Tang, Omega Optics, Inc. (United States)
Swapnajit Chakravarty, Omega Optics, Inc. (United States)
Ray T. Chen, The Univ. of Texas at Austin (United States)
Omega Optics, Inc. (United States)


Published in SPIE Proceedings Vol. 10081:
Frontiers in Biological Detection: From Nanosensors to Systems IX
Amos Danielli; Benjamin L. Miller; Sharon M. Weiss, Editor(s)

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