Fig. 5From: High-Performance Multifunctional Photodetector and THz Modulator Based on Graphene/TiO2/p-Si HeterojunctionThe terahertz time-domain signals. a The terahertz time-domain signals at various gate bias voltages. b Gate voltage-dependent time-domain terahertz transmission peaks of graphene/TiO2/p-SiBack to article page