Fig. 1. Schematic of experiment setup for the proposed current sensor. PC: polarization controller.

Fig. 2. (a) Schematic diagram of the butt-coupling and the designed SMSW for mode motivation using the on-chip offset launch technique. (b) The SEM photograph of the fabricated silicon-based SMSW. (c) Simulated images of the two eigenmodes.

Fig. 3. Effective refractive index change of the two modes with the change of temperature, Δneff0 for TE0 mode and Δneff1 for TE1 mode.

Fig. 4. Measured output spectrum versus current of the proposed sensor.

Fig. 5. Variations in the wavelength shift with current.