Design of a Silicon Overlay Glass Waveguide Sensor ()
ABSTRACT
A glass based slab waveguide, coated with a thin patterned high dielectric overlay, is configured into a refractive index sensor. The asymmetric nature of the waveguide configuration is exploited by keeping the mode in the slab waveguide while enhancing the field level in the overlay-superstrate. The sensor's response is examined using the FDTD simulation technique. A sensitivity of up to one part in 105 in the index of refraction discrimination is determined. The nature of the sensor ensures optical fibre compatibility, requires sub-µL sample volumes and provides a high resolution.
Share and Cite:
Medri, K. and Gauthier, R. (2011) Design of a Silicon Overlay Glass Waveguide Sensor.
Optics and Photonics Journal,
1, 151-154. doi:
10.4236/opj.2011.14025.