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Fabrication and characterization of hot-electron bolometers for THz applications

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5 Author(s)
Frommberger, M. ; Inst. de Radio Astron. Millimetrique, St. Martin d''Heres, France ; Sabon, P. ; Schicke, M.. ; Mattiocco, F.
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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

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Applied Superconductivity, IEEE Transactions on  (Volume:11 ,  Issue: 1 )