Abstract: A terahertz detection device comprises at least one terahertz antenna, a detection microbridge suspended above a substrate comprising a resistive load coupled to the antenna and a resistive bolometric element coupled to the resistive load, a bias circuit for biasing the bolometric element. The device further comprises a skimming microbridge suspended above the substrate, comprising a resistive bolometric element, and substantially identical to the detection microbridge, a reflective metal layer opposite to the skimming microbridge to obtain a destructive interference at the level of the skimming microbridge for a terahertz wavelength, a bias circuit to electrically bias the bolometric element of the skimming microbridge and a read circuit for measuring a difference between the electric signals of the microbridges.

Abstract: A bolometric detector of a terahertz electromagnetic radiation includes at least one bolometric microbridge suspended above a substrate by support and thermal insulation arms, so as to form a cavity between the microbridge and the substrate. The microbridge includes a radiation collection means for collecting the electromagnetic radiation. A resistive means is resistively coupled with the collection means. A thermometric means is thermally coupled with the resistive means. The collection means includes at least one pair of antennas each of the antennas being substantially parallel to the microbridge. A first antenna is capable of collecting the radiation according to a first polarization axis. A second antenna is capable of collecting the radiation according to a second polarization axis, different from the first polarization axis.

Abstract: A bolometric detector of a terahertz radiation, including an assembly reflective for said electromagnetic radiation; at least one bolometric microbridge suspended above the reflective assembly and including a first bowtie antenna, a resistive load coupled with said antenna, and a thermometric element coupled with the resistive load. The reflective assembly includes a reflective layer; an insulating layer on the reflective layer; a periodic array of metallic patterns on the insulating layer, the thickness and the dielectric permittivity of the insulating layer, and the pitch and the filling factor of the array being selected to obtain a constructive interference at the level of said microbridge.

Abstract: A terahertz detection device comprises at least one terahertz antenna, a detection microbridge suspended above a substrate comprising a resistive load coupled to the antenna and a resistive bolometric clement coupled to the resistive load, a bias circuit for biasing the bolometric element. The device further comprises a skimming microbridge suspended above the substrate, comprising a resistive bolometric element, and substantially identical to the detection microbridge, a reflective metal layer opposite to the skimming microbridge to obtain a destructive interference at the level of the skimming microbridge for a terahertz wavelength, a bias circuit to electrically bias the bolometric element of the skimming microbridge and a read circuit for measuring a difference between the electric signals of the microbridges.