Regulating Terahertz Photoconductivity in Two-Dimensional Materials

Two-dimensional materials represented by graphene have attracted extensive interest owing to the unique layer-dependent physical properties that are tunable with various external fields. In addition, stacking two or more 2D together, a new material desired can be tailored and designed. Fully understanding dynamical photoconductive response in is uttermost important design develop advanced optoelectronic devices. Terahertz (THz) time-domain spectroscopy (TDS) time-resolved THz powerful spectroscopic tools advantages of being contact-free noninvasive, which been widely used study photoconductivity (PC) materials. this review, firstly, we provide short introduction spectroscopy, then brief experimental setup data analysis based on presented. After that, overview latest progress regulation PC includes: (1) regulating (Gr) transition metal dichalcogenide (TMD) thin films oxygen adsorption; (2) Gr Gr/TMDs heterostructures electric gating built-in field introduced substrate; (3) Gr/TMD via optical gating; (4) observation elementary excitations spectra following excitation photoexcitation quasi-particles. Finally, conclude review present future research directions.