caa a22 4500 477124747 CHVBK 20180405111646.0 cr unu---uuuuu 170330e19971101xx s 000 0 eng 10.1007/BF02678259 doi (NATIONALLICENCE)springer-10.1007/BF02678259 Bloemhof E. California Institute of Technology, Mail Stop 105-24, 91125, Pasadena, California aut Production of high quality Nb/Al-oxide/Nb SIS trilayers for submillimeter wave mixers [Elektronische Daten] [E. Bloemhof] Owing to a very sharp nonlinearity in the quasiparticle currentvoltage characteristic, which fortuitously occurs on the scale of a few millivolts rather than a few volts as with semiconductor devices, superconductor/insulator/superconductor (SIS) tunnel junctions are the most sensitive detectors for heterodyne mixing at millimeter and submillimeter wavelengths. They can also provide sources of coherent local oscillator power at very high frequencies; more broadly, they have a number of interesting applications as fast, low-power logic elements and as detectors at optical wavelengths. For submillimeterwave mixers, in many ways the most demanding of these applications, the Nb/Al-oxide/Nb material system has emerged as the system of choice to frequencies of ∼ 700 GHz and beyond. Production of SIS devices requires careful attention to a number of critical microfabrication issues, and I describe here some of the insights gained from developing a process for high-quality niobium trilayers that successfully yielded small-area junctions with unusually low sub-gap leakage current. Plenum Publishing Corporation, 1997 mixers nationallicence SIS nationallicence submillimeter techniques nationallicence International Journal of Infrared and Millimeter Waves Springer US 18/11(1997-11-01), 2177-2190 0195-9271 18:11<2177 1997 18 10762 https://doi.org/10.1007/BF02678259 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02678259 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Bloemhof E. California Institute of Technology, Mail Stop 105-24, 91125, Pasadena, California aut NATIONALLICENCE 773 0- International Journal of Infrared and Millimeter Waves Springer US 18/11(1997-11-01), 2177-2190 0195-9271 18:11<2177 1997 18 10762 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer