A Review of the Terahertz Conductivity and Photoconductivity of Carbon Nanotubes and Heteronanotubes

Terahertz (THz) spectroscopy is an ideal non-contact and non-destructive technique that probes the electrical conductivity of nanomaterials. This review presents the current status of research in the THz properties of quasi-1D materials, such as nanotubes (NTs) and NT heterostructures. The detailed description of THz experimental methods (THz time-domain spectroscopy, optical pump-THz probe spectroscopy) and conductivity extraction methods are presented along with the physical models (Drude, plasmon, effective medium theories, etc.) supporting them. Optoelectronic applications, such as optical modulators, switches, and shielding devices, are discussed and illustrate a bright future for these materials.

Automated summary

Terahertz spectroscopy is an ideal technique for studying the electrical conductivity of nanomaterials, with THz experimental methods and conductivity extraction methods supporting various physical models. Optoelectronic applications, such as optical modulators and switches, are discussed, indicating a promising future for quasi-1D materials.