Title :
Fabrication and characterization of hot-electron bolometers for THz applications
Author :
Frommberger, Michael ; Sabon, Philippe ; Schicke, Matthias ; Mattiocco, FranCois ; Schuster, Karl F.
Author_Institution :
Inst. de Radio Astron. Millimetrique, St. Martin d´´Heres, France
fDate :
3/1/2001 12:00:00 AM
Abstract :
Superconducting properties of Nb and NbN thin films for application in diffusion and phonon cooled Hot-Electron Bolometers have been systematically investigated. The materials were sputtered on fused quartz substrates in a wide thickness range. DC-measurements of the Nb films allow us to predict the intermediate frequency bandwidth of a hot-electron bolometer mixer device for a given design. To improve the characteristics of the NbN thin films, we used a 15 nm MgO seed layer
Keywords :
bolometers; hot carriers; niobium; niobium compounds; sputtered coatings; superconducting mixers; superconducting thin films; DC measurement; MgO; MgO seed layer; Nb; Nb thin film; NbN; NbN thin film; SiO2; diffusion cooling; fabrication; fused quartz substrate; hot electron bolometer; intermediate frequency bandwidth; mixer device; phonon cooling; sputter deposition; superconducting properties; terahertz radiation; Bandwidth; Bolometers; Fabrication; Frequency; Niobium; Phonons; Sputtering; Superconducting films; Superconducting materials; Superconducting thin films;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
