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Q: Fachverband Quantenoptik und Photonik
Q 57: Optomechanics II
Q 57.2: Vortrag
Donnerstag, 26. März 2015, 14:45–15:00, P/H1
Optomechnical studies in a nonlinear crystalline whispering gallery mode resonator — •Alexander Otterpohl1,2, Michael Förtsch1,2, Vittorio Peano1, Gerhard Schunk1,2, Ulrich Vogl1,2, Florian Sedlmeir1,2, Dmitry Strekalov1,2, Harald Schwefel1,2, Gerd Leuchs1,2, Florian Marquardt1,2, and Christoph Marquardt1,2 — 1Max Planck Institut für die Physik des Lichts, Günther-Scharowsky-Str. 1, Bau 24, 91058, Erlangen, Deutschland — 2Institut für Optik, Information und Photonik, Universität Erlangen-Nürnberg, Staudtstraße 7/B2, 91058, Erlangen, Deutschland
Whispering gallery mode resonators (WGMR) have demonstrated to be well suited to couple the optical and the mechanical degrees of freedom. Various experiments have been realized using WGMRs made out of amorphous and crystalline materials and at various sizes, ranging from micrometer to millimeter. Here, we report on the experimental observation of optomechanical interactions in a macroscopic (radius 2mm) crystalline LiNbO3 WGMR. The use of a nonlinear crystal offers the possibility to combine the optomechanics with nonlinear optical processes. To minimize damping of the mechanical modes, we realized a suspended setup design, where the WGMR is only mounted from the top. We observe more than twenty mechanical modes in a frequency range between 5 and 40 MHz with a maximum mechanical quality factor of Qmech=3×103. We are currently exploring the optomechanical properties of the WGMR in combination with the generation of parametric light and will report on our latest progress.