Fig. 1. Schematic diagram of a temperature-controlled tunable terahertz filter

Fig. 2. Schematic diagram of microring resonator

Fig. 3. Transmission spectrum of terahertz filter at room temperature

Fig. 4. Terahertz filter transmission efficiency at different temperatures

Fig. 5. Transmission efficiency of resonant peaks at different temperatures from 183.4 to 183.9 GHz

Fig. 6. Resonant peak frequency at different temperatures