Fig. 4From: High-Performance Multifunctional Photodetector and THz Modulator Based on Graphene/TiO2/p-Si HeterojunctionModulation test. a Transmittance spectra of graphene/TiO2/p-Si at various gate bias voltages. b Transmission modulation depth as functions of voltage for graphene/TiO2/p-Si heterojunctionBack to article page