Monolithic terahertz emitter of high-temperature superconductors

Emission of terahertz electromagnetic (EM) waves from a high critical temperature (T
_c
) superconductor intrinsic Josephson junction (IJJ) is a new and promising candidate for practical applications of superconducting devices. The emitted EM waves are considered to be coherent because the emission is yielded by synchronization of thousand stacked IJJs consisting of the mesa device. The device has advantages of broad range of frequency tuning and manipulation of polarization with monolithic device structure.