Active terahertz modulator based on optically controlled organometal halide perovskite MAPbIBr.

In this paper, an active terahertz modulator based on optically controlled organometal halide perovskite is proposed. The terahertz wave time-domain transmission of the / sample was measured by a terahertz time-domain spectrometer. Experimental results indicate that the / sample showed an obvious optical-power-dependent modulation effect on transmission of the terahertz wave; the maximum modulation depth of the modulator can reach 59.99% at 0.3 THz when the external pump optical power is up to 1500 mW.