High Q-factor sapphire whispering gallery mode microwave resonator at single photon energies and millikelvin temperatures

Creedon, Daniel L., Reshitnyk, Yarema, Farr, Warrick, Martinis, John M., Duty, Timothy L. and Tobar, Michael E. (2011) High Q-factor sapphire whispering gallery mode microwave resonator at single photon energies and millikelvin temperatures. Applied Physics Letters, 98 22: 222903.1-222903.3. doi:10.1063/1.3595942


Author Creedon, Daniel L.
Reshitnyk, Yarema
Farr, Warrick
Martinis, John M.
Duty, Timothy L.
Tobar, Michael E.
Title High Q-factor sapphire whispering gallery mode microwave resonator at single photon energies and millikelvin temperatures
Formatted title
High -factor sapphire whispering gallery mode microwave resonator at single photon energies and millikelvin temperatures
Journal name Applied Physics Letters   Check publisher's open access policy
ISSN 0003-6951
1077-3118
1520-8842
Publication date 2011-05-30
Sub-type Article (original research)
DOI 10.1063/1.3595942
Open Access Status DOI
Volume 98
Issue 22
Start page 222903.1
End page 222903.3
Total pages 3
Place of publication College Park, MD, United States
Publisher American Institute of Physics
Language eng
Subject 3101 Physics and Astronomy (miscellaneous)
Formatted abstract
The microwave properties of a crystalline sapphire dielectric whispering gallery mode resonator have been measured at very low excitation strength (/≈1) and low temperatures (≈30 mK). The measurements were sensitive enough to observe saturation due to a highly detuned electron spin resonance, which limited the loss tangent of the material to about 2× 10-8 measured at 13.868 and 13.259 GHz. Small power dependent frequency shifts were also measured which correspond to an added magnetic susceptibility of order 10-9. This work shows that quantum limited microwave resonators with -factors > 108 are possible with the implementation of a sapphire whispering gallery mode system.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Mathematics and Physics
 
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