Proposed high performance source for the generation of high stability THz signals

We describe a new method for the generation of terahertz radiation with low linewidth and high stability, over virtually any desired span of this region of the spectrum. The technique is based on the use of a high-Q optical microresonator with whispering gallery modes. The resonator has a special geometry that allows well separated modes. The proposed device has the added features of small size with low power requirements, and thus is suitable for space and mobile platform applications.