Input Bandwidth of Hot Electron Bolometer With Spiral Antenna

Author

Shurakov, Alexander ; Seliverstov, Sergey ; Kaurova, Natalia ; Finkel, Matvey ; Voronov, Boris ; Goltsman, Gregory

Author_Institution

Moscow State Pedagogical Univ., Moscow, Russia

Volume

2

Issue

4

fYear

2012

fDate

7/1/2012 12:00:00 AM

Firstpage

400

Lastpage

405

Abstract

We report the results of our study of the input bandwidth of hot electron bolometers (HEB) embedded into the planar log-spiral antenna. The sensitive element is made of the ultrathin superconducting NbN film patterned as a bridge at the feed of the antenna. The contacts between the antenna and a sensitive element are made from in situ deposited gold (i.e., deposited over NbN film without breaking vacuum), which gives high quality contacts and makes the response of the HEB at higher frequencies less affected by the RF loss. An accurate experimental spectroscopic procedure is demonstrated that leads to the confirmation of the wide ( 8 THz) bandwidth in this antenna coupled device.

Keywords

bolometers; gold; planar antennas; spiral antennas; superconducting thin films; ultra wideband antennas; Au-NbN; HEB; NbN; RF loss; antenna coupled device; hot electron bolometer; planar log spiral antenna; spectroscopic procedure; ultrathin superconducting NbN film; Antenna measurements; Antennas; Bandwidth; Bolometers; Frequency measurement; Spirals; Temperature measurement; Hot electron bolometer (HEB); terahertz (THz) region; ultra wideband antennas;

fLanguage

English

Journal_Title

Terahertz Science and Technology, IEEE Transactions on

Publisher

ieee

ISSN

2156-342X

Type

jour

DOI

10.1109/TTHZ.2012.2194852

Filename

6226432