Ultrahigh finesse Fabry-Perot superconducting resonator

• Published in: arXiv.org
• Main Authors: Kuhr, Stefan, Gleyzes, Sébastien, Guerlin, Christine, Bernu, Julien, Ulrich Busk Hoff, Deléglise, Samuel, Osnaghi, Stefano, Brune, Michel, Jean-Michel Raimond, Haroche, Serge, Jacques, E, Bosland, P, Visentin, B
• Format: Paper
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 17.07.2007
• Subjects: Damping; Diamond films; Diamond machining; Frequency ranges; Niobium; Quantum phenomena; Quantum theory; Resonators; Superconductivity

We have built a microwave Fabry-Perot resonator made of diamond-machined copper mirrors coated with superconducting niobium. Its damping time (Tc = 130 ms at 51 GHz and 0.8 K) corresponds to a finesse of 4.6 x 109, the highest ever reached for a Fabry-Perot in any frequency range. This result opens n...