  In this study we investigate the directional scattering of terahertz
radiation by dielectric cylinders, focusing on the enhancement of
directionality using incident radiation of complex-frequency. We explore the
optimization of the second Kerker condition, which corresponds to backward
scattering. At first, by carefully tailoring the electric and magnetic
polarizabilities of the cylinders, we successfully achieve significant backward
scattering, and then manage to even further improve it by deploying a decaying
incoming wave (\textit{complex}-frequency). Additionally, we present
preliminary results on the directional scattering of THz radiation by a
magneto-optical cylinder, demonstrating the potential of this approach for
advanced control over the propagation of THz waves. Our findings contribute to
a deeper understanding of THz directional scattering and pave the way for the
development of novel THz devices and applications, such as high-resolution
imaging, sensing, and communication systems.
