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

Conference Paper

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. © 2009 SPIE.

Full Text

Duke Authors

Cited Authors

  • Grego, S; Stoner, BR

Published Date

  • June 15, 2009

Published In

Volume / Issue

  • 7218 /

International Standard Serial Number (ISSN)

  • 0277-786X

International Standard Book Number 13 (ISBN-13)

  • 9780819474643

Digital Object Identifier (DOI)

  • 10.1117/12.808428

Citation Source

  • Scopus