High- $T_{c}$ Josephson Square-Law Detectors and Hilbert Spectroscopy for Security Applications

Among various discussed ways of explosive detection, the techniques using electromagnetic radiation are considered as having great potential and research activities are recommended in this field. To identify new threats, like liquid explosives, with low rate of false alarms, fast spectral measurements are required in a broad frequency range from microwave to terahertz. We attract attention to a great potential of high-T_c Josephson technology in security applications and present our results in developing high-T_c Josephson junctions for Hilbert spectroscopy and detector arrays.