  In the framework of macroscopic continuous medium approach, we studied the
interaction between a fast-moving charged particle and dielectric or
semiconducting media with low energy electrically active excitations. The
excitations contribute to frequency dispersion of the media dielectric
permittivity. Two types of processes induced by a moving charged particle are
considered: electron-hole generation under interband transitions and excitation
of polar optical phonons. For both processes we calculated and analyzed the
time- and space-dependent electric potential generated by the charged particle,
polarization of the media, energy losses of the particle and other important
constituents of the interaction patterns. Obtained results can contribute to
deeper understanding of the charged particle beams interaction with a
semiconducting medium, as well as may be useful for versatile applications of
charged beams.
