摘要:
The inventive concept relates to a terahertz receiver. The terahertz receiver of the inventive concept includes a plurality of terahertz detectors detecting signals of terahertz band from received signals; a plurality of optical signal processing parts converting the detected terahertz signals into optical signals; an optical combiner combining the converted optical signals into one optical signal; a photodiode converting the combined optical signal into an electrical signal; and an amplifier amplifying the electrical signal.
摘要:
Disclosed is a terahertz transmitter which includes a photonics oscillator configured to generate two optical signals with different wavelength and strong correlation; a modulator configured to modulate the optical signals; a pre-amplifier configured to amplify the modulated optical signals; a photomixer configured to generate a terahertz signal through photomixing of the amplified optical signals; and a post-amplifier configured to amplify the terahertz signal and to transmit the amplified terahertz signal through an antenna.
摘要:
Provided is a waveguide photomixer in which an absorption layer is selectively etched to reduce a junction area. The waveguide photomixer includes a buffer layer disposed on a substrate, a first clad layer disposed on the buffer layer and formed to have smaller width than that of a top surface of the buffer layer, an absorption layer disposed on the first clad layer and formed to have smaller width than that of a top surface of the first clad layer, a second clad layer disposed on the absorption layer and formed to have greater width than that of a top surface of the absorption layer, a contact layer disposed on the second clad layer, a first electrode unit disposed on the buffer layer where the first clad layer is not disposed, and a second electrode unit disposed on the contact layer.