Arrangement for an antenna for generating or receiving terahertz radiation, antenna, terahertz system, and method for producing an arrangement for an antenna

An antenna for generating or receiving terahertz radiation comprising:

• an antenna arrangement for generating or receiving terahertz radiation;
• and
• an antenna conductor, the antenna conductor comprising:
• a first sub-structure;
• and
• a second sub-structure;
• wherein the antenna arrangement comprises:
• a photoactive layer that can be activated by optical radiation in a range of 1200 nm to 1700 nm, inclusive;
• a substrate transparent to the optical radiation attached to the photoactive layer;
• and
• a carrier transparent to the optical radiation attached to the substrate, arranged between the photoactive layer and the carrier, wherein the substrate and the carrier are made from identical material, wherein a first adhesion-promoting layer is arranged between the photoactive layer and the substrate such that the photoactive layer and the substrate are situated flat and flush with each other with the first adhesion-promoting layer therebetween, and wherein the first adhesion-promoting layer has a thickness of at most 5 μm;
• and
• wherein the first sub-structure and the second sub-structure are distanced from one another by a gap and contact the photoactive layer.

A terahertz system for generating and coherently detecting terahertz radiation comprising:

• a laser light source;
• and
• two terahertz (THz) antennas, wherein each of the THz antennas are optically coupled to the laser light source and can be activated by optical radiation from the laser light source, wherein a first of the antennas serves as a transmitting antenna and a second of the antennas serves as a receiving antenna, and wherein at least one of the transmitting antenna or the receiving antenna comprise:
• an antenna conductor comprising a first sub-structure and a second sub-structure;
• and
• an antenna arrangement comprising:
• a photoactive layer that can be activated by optical radiation in a range of 1200 nm to 1700 nm, inclusive;
• a substrate transparent to the optical radiation attached to the photoactive layer;
• and
• a carrier transparent to the optical radiation attached to the substrate, arranged between the photoactive layer and the carrier, wherein the substrate and the carrier are made from identical material, wherein a first adhesion-promoting layer is arranged between the photoactive layer and the substrate such that the photoactive layer and the substrate are situated flat and flush with each other with the first adhesion-promoting layer therebetween, and wherein the first adhesion-promoting layer has a thickness of at most 5 μm;
• and
• wherein the first sub-structure and the second sub-structure are distanced from one another by a gap and contact the photoactive layer, and wherein the antenna conductor is arranged on a side of the photoactive layer away from or toward the substrate.

A method for producing an arrangement for an antenna for generating or receiving terahertz radiation, the method comprising:

• producing a photoactive layer on an auxiliary substrate which is at least predominantly formed from InP;
• connecting the photoactive layer flat to a substrate by means of a first adhesion-promoting layer which has a layer thickness of at most 5 μm;
• removing the auxiliary substrate, especially by chemical etching, and
• attaching the substrate to a carrier so that the substrate is arranged between the photoactive layer and the carrier, wherein the photoactive layer is activated by optical radiation in a range of 1200 nm to 1700 nm, wherein the substrate and the carrier are made of the same material, and wherein the substrate and the carrier are transparent to the optical radiation.