Novel low temperature superconducting bolometers

We have designed and fabricated novel antenna-coupled superconducting bolometers for submillimeter and millimeter waves, which make use of the thermal boundary resistance between metals and insulators and the trapping of quasiparticles at metal-superconductor interfaces. We have used these devices to make measurements of the frequency response and optical efficiency of the log-periodic antennas between 90 GHz to 1.8 THz.