Terahertz (THz) radiation, occupying the spectral region between microwave and infrared, has emerged as a powerful tool for applications in materials science, biology, security, and ultrafast dynamics. Accelerator-based THz sources offer distinct advantages over conventional laser-based systems, including superior pulse energy, spectral brightness, tunability, and repetition rate. This...
The terahertz frequency range is located between the realms of electronics and optics in the electromagnetic spectrum. Light-matter interaction in this sub-mm wavelength range can therefore happen via both continuous and quantized processes, strongly dependent on material properties. The THz electric field can accelerate quasi-free carriers, but also excite rotational and low-lying vibrational...
