This digest paper debates basic features of the terahertz band of frequencies and compares it to the classical photonics.
There are presented fundamental characteristics of the basic terahertz system consisting of a THz source, propagation
media, transmission lines, THz signal processing, and detectors. Such a system finds research application, but also
practical in two main areas: terahertz imaging - transmission and reflective, and as a close range THz radar, but also as
sensory systems mainly for molecular sensing. There were launched in this country a few THz research projects
concerning the THz sources, detectors and their applications. Among these projects there is an infrastructural one called
FOTEH, opened at the WUT. The details of this project are debated and the consequences of its realization in this
country. The first part of the paper is an introduction debating THz band and comparing it with the photonics one. The
second part presents the assumptions of the infrastructural FOTEH project on Photonics and Terahertz Technologies.
The project is expected to have impact on the development of photonics and relate fields in Poland.