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Proceedings Paper

Wavelength interrogation of optical waveguide biosensors in the input grating coupler configuration
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Paper Abstract

A planar optical waveguide with an input grating coupler was used as an affinity-based biodetection device. Nanoimprint lithography was used to integrate the grating patterns with low loss silicon oxynitride thin-film waveguides. A widely tunable laser source at 1550nm was used to characterize the device sensitivity to bulk medium changes, to thin film adsorption, and to streptavidin protein. For each test, a comparison was performed between the sensitivity of wavelength interrogation and the more standard angular interrogation approach. The effects of surface reflections on the measured coupling curves were observed and interpreted, with mitigation options being considered.

Paper Details

Date Published: 9 February 2009
PDF: 9 pages
Proc. SPIE 7218, Integrated Optics: Devices, Materials, and Technologies XIII, 72181A (9 February 2009); doi: 10.1117/12.808428
Show Author Affiliations
Sonia Grego, RTI International (United States)
Brian R. Stoner, RTI International (United States)

Published in SPIE Proceedings Vol. 7218:
Integrated Optics: Devices, Materials, and Technologies XIII
Jean-Emmanuel Broquin; Christoph M. Greiner, Editor(s)

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