Generation and Detection of THz Radiation by Antennas Based on Topological Insulators Bi2-xSbxTe3-ySey

Using terahertz time-domain spectroscopy, thin films of topological insulators Bi
_2-x
Sb
_x
Te
_3-y
Se
_y
of various thicknesses and chemical compositions were studied. An increase in the power of THz wave radiation was demonstrated by applying an external electric field to electrodes deposited on a topological insulator. The possibility of detecting THz wave radiation using antennas based on topological insulators is being considered.