Back to Search
Start Over
Bolometric technique for high-resolution broadband microwave spectroscopy of ultra-low-loss samples.
- Source :
- Review of Scientific Instruments; Jan2004, Vol. 75 Issue 1, p124-135, 12p
- Publication Year :
- 2004
-
Abstract
- A novel low-temperature bolometric method has been devised and implemented for high-precision measurements of the microwave surface resistance of small single-crystal platelet samples having very low absorption, as a continuous function of frequency. The key to the success of this nonresonant method is the in situ use of a normal metal reference sample that calibrates the absolute rf field strength. The sample temperature can be controlled independently of the 1.2 K liquid-helium bath, allowing for measurements of the temperature evolution of the absorption. However, the sensitivity of the instrument decreases at higher temperatures, placing a limit on the useful temperature range. Using this method, the minimum detectable power at 1.3 K is 1.5 pW, corresponding to a surface resistance sensitivity of ≈1 μΩ for a typical 1 mm×1 mm platelet sample. © 2004 American Institute of Physics. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00346748
- Volume :
- 75
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Review of Scientific Instruments
- Publication Type :
- Academic Journal
- Accession number :
- 11753337
- Full Text :
- https://doi.org/10.1063/1.1633001