Directional Coupler Biosensor Based on Thermooptic Detection Mechanism in Silica Waveguide

• Published in: IEEE photonics journal Vol. 8; no. 1; pp. 1 - 8
• Main Author: Tang, Tingting
• Format: Journal Article
• Language: English
• Published: Piscataway IEEE 01.02.2016; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: biosensor; Biosensors; Couplings; directional coupler; Directional couplers; Refractive index; Silicon compounds; Sugar; thermo-optic effect; directional coupler; Biosensor; thermo-optic effect

We propose a directional coupler (DC) biosensor to detect the concentration of glucose based on the thermooptic detection mechanism in silica waveguide. We discuss the design principles using the coupled-mode theory of DC and deduce the conditions for a valid biosensor model. The coupling length, th...