Terahertz Grid Frequency Doublers

A terahertz quasi-optical grid frequency doubler has been developed. This frequency doubler is a planar bow-tie grid structure periodically loaded with planar Schottky diodes. This is the first experimental result with quasi-optical grid frequency multipliers in the terahertz frequency range. A peak output power of 330 FW was measured at 1 THz for 2.42 ps 500-GHz input pulses with a peak power of 3.3 W.