Fabrication of slot antenna array coupled warm carrier far-infrared radiation detectors
Slot antenna coupled thin-film warm carrier devices were fabricated, and the detection properties were investigated at 700 GHz. Two-dimensional 83 slot antenna arrays fed by a coplanar waveguide were used as the antennas. The antenna arrays, which consisted of slots 198 ?m long and 22 ?m wide, were fabricated using a photolithographic method. The warm carrier detectors, which have a contact area of 810?10 cm2, were fabricated using an electron beam lithographic method. The experimental results indicate that the fabricated devices operate as an antenna coupled far-infrared radiation detector. By changing the antenna from a single slot antenna to a two-dimensional 83 slot antenna array, the detected sensitivity improved by 11 dB.
slot antenna array warm carrier device far-infrared detector thin-film antenna