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

Volume

11

Issue

1

fYear

2001

fDate

3/1/2001 12:00:00 AM

Firstpage

566

Lastpage

569

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;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.919408

Filename

919408