Electric Field Detection Using Whispering-Gallery Modes Cavities

Electric Field Detection Using Whispering-Gallery Modes Cavities

Mathematical Models and Simulation

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This book presents and verifies the mathematical model of an electric field senor based on the whispering gallery mode (WGM). The sensing element is a dielectric microsphere, where the light is used to tune the optical modes of the microsphere. The light undergoes total internal reflection along the circumference of the sphere; then it experiences optical resonance. The WGM are monitored as sharp dips on the transmission spectrum. These modes are very sensitive to morphology changes of the sphere, such that, for every minute change in the sphere's morphology, a shift in the transmission spectr...