Abstract

• The terahertz time-domain spectroscopy (THz-TDS) is a noncontact tool to measure the optical and electrical parameters of the nanometrics semiconductors/semimetals. Terahertz electromagnetic waves from 0.1 to 10 THz, bounded between the infrared and microwave regions of the spectrum, has been intensively attracted to explore scientific and engineering phenomena for the materials. Terahertz time domain spectroscopy (THz TDS) is a powerful tool for both, to characterize the free carrier response of graphene and probe the inter and intraband response of excited carriers with sub-ps (pico second) time resolution. This work presents application of noncontact THz-TDS techniques and analysis for the terahertz properties of TiO2-GO in the new generation of optoelectronic devices.