Exploring THz efficiency: frequency chirp dynamics in Sinh-Gaussian laser–plasma interaction

In recent years, terahertz (THz) radiation has become an extremely useful instrument in a variety of domains, including spectroscopy, imaging, and communication, due to its exceptional qualities. In this paper, we analyse the creation of THz radiation by employing two Sinh-Gaussian chirped laser pulse profile in homogeneous collisionless plasma. Nonlinear ponderomotive force developed due to this propagation in studied analytically and expression for nonlinear current density is derived. This nonlinear current density is responsible for THz generation. Role of decentered parameter, frequency chirp parameter and transverse distance is studied and concluded that with increase in decentered parameter and transverse distance, THz efficiency increases while decreases with increase in positive frequency chirp parameter. Our findings elucidate optimal conditions for maximizing THz output power and spectral bandwidth, providing valuable insights for the design and optimization of THz sources based on chirped laser pulses.