Abstract
Planar waveguide optical sensor development has principally been driven by the need for rapid, automated devices for application in the fields of clinical diagnostics and biological detection. This chapter is prepared as theoretical basis providing the basic foundation and supported by application as evidence for the sensor development. Using Maxwell’s equation, a theoretical analysis for wave propagation in planar waveguide sensor with silicon oxynitride (SiON) as the waveguide material is presented. The theoretical results are in good agreement with experimental results. Theoretical consideration, supporting calculations, and experimental results showed that the sensor can be used for online monitoring of glucose level as it requires very minimal sample volume for its detection with high sensitivity. The sensor will have a significant impact on health care in the near future.
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