Fig. 1. Cross section of the bullseye structure (a) x-z cross section (elevation view) and (b) x-y cross section (top view).

Fig. 2. Schematic diagram of the regulation strategy.

Fig. 3. Transmission spectra of the signal light under different powers of controlling light.

Fig. 4. Wavelength of the primary transmission peak under different powers of controlling light.

Fig. 5. X axis distribution of the refractive index.

Fig. 6. Transmission spectra of the signal light under different powers of controlling light.

Fig. 7. Wavelengths of the primary transmission peak under different powers of controlling light.