Ultrahigh finesse Fabry-Pérot superconducting resonator

S. Kuhr, S. Gleyzes, C. Guerlin, J. Bernu, U. B. Hoff, S. Deleglise, S. Osnaghi, M. Brune, J. -M. Raimond, S. Haroche, E. Jacques, P. Bosland, B. Visentin

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188 Citations (Scopus)


The authors have built a microwave Fabry-Perot resonator made of diamond-machined copper mirrors coated with superconducting niobium. Its damping time (T-c=130 ms at 51 GHz and 0.8 K) corresponds to a finesse of 4.6x10(9), the highest ever reached for a Fabry-Perot in any frequency range. This result opens many perspectives for quantum information processing, decoherence and nonlocality studies.

Original languageEnglish
Article number164101
Number of pages3
JournalApplied Physics Letters
Issue number16
Publication statusPublished - 16 Apr 2007


  • Fabry-Perot resonators
  • superconducting resonators
  • microwave devices
  • machining
  • optical films
  • niobium


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