Wavelength interrogation of grating-based optical biosensors in the input coupler configuration

Journal Article (Journal Article)

A planar optical waveguide with an input grating coupler was used as a label-free 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 1550 nm was used to characterize the device sensitivity to bulk medium changes, to thin film adsorption, and to protein binding. For each test, a comparison was performed between the sensitivity of wavelength interrogation and the more standard angular interrogation approach. The results indicate that these devices used in wavelength interrogation with a telecom laser source are perfectly suited to be integrated in compact and sensitive biodetection systems. © 2007 Elsevier B.V. All rights reserved.

Full Text

Duke Authors

Cited Authors

  • Grego, S; McDaniel, JR; Stoner, BR

Published Date

  • May 14, 2008

Published In

Volume / Issue

  • 131 / 2

Start / End Page

  • 347 - 355

International Standard Serial Number (ISSN)

  • 0925-4005

Digital Object Identifier (DOI)

  • 10.1016/j.snb.2007.11.053

Citation Source

  • Scopus