Abstract and Review-Review of photomixing continuous-wave terahertz systems and current application trends in terahertz domain

Reza Safian, Galia Ghazi,  Nafiseh Mohammadian,

Main THz detectors are thermal detectors, electro-optical detectors, and PCAs.

https://www.spiedigitallibrary.org/journals/Optical-Engineering/volume-58/issue-11/110901/Review-of-photomixing-continuous-wave-terahertz-systems-and-current-application/10.1117/1.OE.58.11.110901.full?SSO=1

Within the last two decades, terahertz systems have become a well-established tool in scientific laboratories and industrial research and development departments. Unlike the methods of pulsed terahertz radiation that mainly rely on ultrafast optical technology, the technology behind continuous-wave terahertz sources and detectors has a long history involving many different types of technical schemes. The intent is to provide a brief review of the continuous-wave terahertz systems that are based on photomixing and current application trends in the field of terahertz technology