Next Article in Journal
Recent Advances in Nanotechnology Applied to Biosensors
Next Article in Special Issue
Development of an Electrogenerated Chemiluminescence Biosensor using Carboxylic acid-functionalized MWCNT and Au Nanoparticles
Previous Article in Journal
Apparent Thixotropic Properties of Saline/Glycerol Drops with Biotinylated Antibodies on Streptavidin-Coated Glass Slides: Implications for Bacterial Capture on Antibody Microarrays
Previous Article in Special Issue
Applications of Nanomaterials in Electrogenerated Chemiluminescence Biosensors
Article Menu

Export Article

Open AccessArticle
Sensors 2009, 9(2), 1012-1032;

Efficient Chemical Sensing by Coupled Slot SOI Waveguides

Dipartimento di Elettrotecnica ed Elettronica, Politecnico di Bari, via Edoardo Orabona n. 4, 70125 Bari, Italy
Author to whom correspondence should be addressed.
Received: 29 January 2009 / Revised: 11 February 2009 / Accepted: 13 February 2009 / Published: 16 February 2009
(This article belongs to the Special Issue Nanotechnological Advances in Biosensors)
Full-Text   |   PDF [972 KB, uploaded 21 June 2014]


A guided-wave chemical sensor for the detection of environmental pollutants or biochemical substances has been designed. The sensor is based on an asymmetric directional coupler employing slot optical waveguides. The use of a nanometer guiding structure where optical mode is confined in a low-index region permits a very compact sensor (device area about 1200 μm2) to be realized, having the minimum detectable refractive index change as low as 10-5. Silicon-on-Insulator technology has been assumed in sensor design and a very accurate modelling procedure based on Finite Element Method and Coupled Mode Theory has been pointed out. Sensor design and optimization have allowed a very good trade-off between device length and sensitivity. Expected device sensitivity to glucose concentration change in an aqueous solution is of the order of 0.1 g/L. View Full-Text
Keywords: Integrated optics; Optical sensor; Slot waveguides; Silicon-on-insulator Integrated optics; Optical sensor; Slot waveguides; Silicon-on-insulator
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

Share & Cite This Article

MDPI and ACS Style

Passaro, V.M.N.; Dell’Olio, F.; Ciminelli, C.; Armenise, M.N. Efficient Chemical Sensing by Coupled Slot SOI Waveguides. Sensors 2009, 9, 1012-1032.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top