From Superconducting to Semiconducting YBCO Thin Film Bolometers: Sensitivity and Crosstalk Investigations for Future THz Imagers

Author

Jagtap, Vishal S. ; Scheuring, Alexander ; Longhin, Mattia ; Kreisler, Alain J. ; Dégardin, Annick F.

Author_Institution

SUPELEC-LGEP, UPMC Univ. Paris 06, Paris, France

Volume

19

Issue

3

fYear

2009

fDate

6/1/2009 12:00:00 AM

Firstpage

287

Lastpage

292

Abstract

YBa₂Cu₃O_6+x compounds are well known to exhibit superconducting properties for x > 0.5 and semiconducting properties for lower oxygen content. Superconducting YBCO was obtained commercially; the semiconducting material was deposited by sputtering close to room temperature (100degC, typically). In order to migrate from superconducting to uncooled semiconducting far-infrared bolometer technologies, we have compared the performance of 2 times 2 pixel arrays. Pixels were in the shape of meanders, embedded in an area of about 1 mm². Pixel detectivity and thermal crosstalk were studied in the 1 Hz to 100 kHz modulation frequency range by using a 850 nm solid state laser. Specific THz antenna concepts were also considered.

Keywords

barium compounds; bolometers; crosstalk; high-temperature superconductors; infrared detectors; sputter deposition; superconducting arrays; superconducting thin films; terahertz wave devices; ytterbium compounds; THz antenna concepts; YBa₂Cu₃O_6+x; frequency 1 Hz to 100 kHz; semiconducting YBCO thin film bolometers; semiconducting far-infrared bolometer; size 850 nm; sputter deposition; superconducting properties; superconducting thin film; Bolometer arrays; THz antennas; semiconducting YBCO; superconducting YBCO; thermal modeling;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2009.2019285

Filename

5153238