Centre National De La Recherche Scientifique

Emilien Pascal Peytavit

Jean-François Lampin

Jean-François Fernand Lampin

The invention relates to a light mixer for generating terahertz radiation, comprising a photodetector (PHD) coupled to an antenna (AT) for terahertz radiation, characterized in that the photodetector comprises a layer of photoconductive material capable of absorbing optical radiation, said layer having a thickness that is less than the absorption length of said radiation by the photoconductive material and being contained between an at least partially transparent so-called upper electrode and a reflective so-called lower electrode, said lower and upper electrodes comprising a resonant cavity for said optical radiation. The invention further relates to a terahertz radiation source comprising such a light mixer and to two laser radiation sources arranged to stack two laser radiation beams on the upper electrode of the photodetector. The invention also relates to the use of such a light mixer for generating terahertz radiation via light mixing.

Light mixer for generating terahertz radiation

An integrated antenna for transmitting or receiving radiation in a frequency range from 100 GHz to 3 THz, the antenna being characterized in that it comprises: a conductive ground plane (PM) deposited on a 'top' surface (S) of a dielectric or semiconductor substrate (SB); a conductive ribbon (RC) extending above said ground plane (PM) and forming an angle (&#x3b2;) therewith, so as to form a radiating structure (SR) of the transverse electromagnetic wave horn type; and a planar waveguide (G) comprising at least first and second conductive strips (BS, BS) formed on said top surface of the substrate, and connected respectively to said conductive ribbon (RC) and to said conductive ground plane (PM). A terahertz transmitter and/or receiver including such an antenna and a device for generating and/or detecting a terahertz signal integrated on the same substrate (SB) as the antenna and connected thereto by said waveguide (G). A method of fabricating such an antenna and such a transmitter and/or receiver.

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Lille, France

Emilien Pascal Peytavit