Fig. 1. Design of structure. (a) Schematic of optical triode model; (b) actual model structure ( layers G and L are made of InSb; sign of “×” denotes direction of magnetic field, which is -y direction)

Fig. 2. Transmission spectra for different τ. (a) τ=0; (b) τ=0.5000; (c) τ=0.7000; (d) τ=0.7742

Fig. 3. Magnetic field distribution of this model in pole state

Fig. 4. Transmittance varying with magnetic field B at different frequencies for τ=0.7742

Fig. 5. Range of input signal B=2.5+0.8×sin t (T)

Fig. 6. Signal amplification. (a) Input signal B=2.5+0.8×sin t (T); (b) transmittance of output signal

Fig. 7. Selection of static operating point in phase and linear modulation range

Fig. 8. Signal amplification in phase. (a) Input signal B=2.5+0.45×sin t (T); (b) transmittance of output signal

Fig. 9. Selection of static operating point out phase and linear modulation range

Fig. 10. Signal amplification out phase. (a) Input signal B=3.8+0.4×sin t (T); (b) transmittance of output signal