Terahertz quantum cascade laser (QCL) sources represent a significant breakthrough in the generation of coherent terahertz radiation from compact, electrically pumped semiconductor devices. By ...
Terahertz (THz) radiation, occupying the spectral region between microwave and infrared frequencies, is emerging as a vital tool in fields ranging from wireless communications and spectroscopy to ...
The nonlinear susceptibility is a measure of a material's nonlinear response to an applied electric field. It determines the strength of the nonlinear effects and is related to the crystal's symmetry ...