Patent ID: 7630588

Claim:
An electromagnetic wave generating device for generating an electromagnetic wave having a frequency ranging from 30 GHz to 30 THz, including: a laser device; an optical waveguide for propagating a laser beam emitted from the laser device; a photoconductive switch for converting the laser beam propagated through the optical waveguide to the electromagnetic wave; and a transmission line comprising a conductor for propagating the electromagnetic wave converted by the photoconductive switch, wherein the laser device, the optical waveguide, the photoconductive switch and the transmission line are integrated on a substrate and arranged in a plane of the substrate, wherein a first electrode and a second electrode are provided on an upper surface of the photoconductive switch such that a gap is formed between the electrodes at an end of the upper surface, which end is closer to the optical waveguide, and wherein the optical waveguide is arranged such that the laser beam propagated through the optical waveguide irradiates a lateral surface of the photoconductive switch, which lateral surface is closer to the optical waveguide, at a portion corresponding to the gap.