ABSTRACT

Since the early days of physics, physicists and engineers have been endeavoring to examine the interaction of electromagnetic waves with matter. Developing new sources has been one of the most important factors in exploring novel phenomena in physics and chemistry, which has enabled innovations in linear and nonlinear spectroscopy techniques. While such development at microwave and optical frequencies has been rapidly advanced in the last century, terahertz (THz) technology has only been around for about three decades [1,2]. Nevertheless, as illustrated in the previous chapters of this book, the wide range of possible applications of

4.1 Introduction ....................................................................................................85 4.2 Generation Techniques ...................................................................................86