Single-crystalline Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+x} detectors for direct detection of microwave radiation

Journal Article · Mon Apr 13 00:00:00 EDT 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4918788· OSTI ID:22398901

Winkler, D.; Yurgens, A. ^[1]

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1. Department of Microtechnology and Nanoscience - MC2, Chalmers University of Technology, SE-41296 Gothenburg (Sweden)

We test radiation detectors made from single-crystalline Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+x} flakes put on oxidized Si substrates. The 100-nm-thick flakes are lithographically patterned into 4×12 μm{sup 2} large rectangles embedded in thin-film log-spiral antennas. The SiO{sub 2} layer weakens the thermal link between the flakes and the bath. Two modes of radiation detection have been observed. For a bolometric type of sensors a responsivity of ∼300 V/W and a noise equivalent power of 30 nW/√(Hz) has been deduced at 70 K. Much more sensitive is the non-bolometric device showing characteristics similar to a Golay-type detector while being at least a thousand times faster. Making smaller (sub-μm) structures is expected to significantly improve the performance of these devices and makes them very competitive among other microwave and terahertz detectors.

• OSTI ID: 22398901
• Journal Information: Applied Physics Letters, Vol. 106, Issue 15; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANTENNAS
BISMUTH COMPOUNDS
BOLOMETERS
CALCIUM COMPOUNDS
CUPRATES
LAYERS
MICROWAVE RADIATION
MONOCRYSTALS
NOISE
PERFORMANCE
RADIATION DETECTION
RADIATION DETECTORS
SENSORS
SILICON
SILICON OXIDES
STRONTIUM COMPOUNDS
SUBSTRATES
THIN FILMS