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Proceedings Paper

Optimization of waveguide structure for local evanescent field shift detection
Author(s): Zhangjing Yi; Rongjin Yan; Timothy A. Erickson; Rashid Safaisini; Kevin L. Lear
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Paper Abstract

The waveguide structure for the local evanescent array coupled (LEAC) biosensor is optimized theoretically with Beam Propagation Method (BPM) simulations. The LEAC biosensor has successfully demonstrated experimental results of a sensitivity of 16% /nm and a metrology limit of 14 pm. Considering the waveguide thickness detector position used in previous experiments are far from optimized values, the detection performance of the LEAC sensor can be significantly improved with the simulated optimal structure. With the optimized parameters, when the upper cladding is air the estimated metrology limit is 0.8 pm; with water as the upper cladding for real-time measurements in an intigrated microfluidic channel, the estimated metrology limit is 1.6 pm.

Paper Details

Date Published: 8 February 2011
PDF: 8 pages
Proc. SPIE 7941, Integrated Optics: Devices, Materials, and Technologies XV, 79410L (8 February 2011); doi: 10.1117/12.875962
Show Author Affiliations
Zhangjing Yi, Colorado State Univ. (United States)
Rongjin Yan, Colorado State Univ. (United States)
Timothy A. Erickson, Colorado State Univ. (United States)
Rashid Safaisini, Colorado State Univ. (United States)
Kevin L. Lear, Colorado State Univ. (United States)

Published in SPIE Proceedings Vol. 7941:
Integrated Optics: Devices, Materials, and Technologies XV
Jean Emmanuel Broquin; Gualtiero Nunzi Conti, Editor(s)

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