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 Title: TOWARD QUANTUM STATE RESOLVED INFRARED FREQUENCY COMB SPECTROSCOPY OF THE C60 FULLERENE Author(s): Changala, Bryan Contributor(s): Ye, Jun; Fermann, Martin; Lee, Kevin; Weichman, Marissa L. Subject(s): Mini-symposium: Frequency-Comb Spectroscopy Abstract: In this talk, we report on progress toward high resolution infrared frequency comb spectroscopy of buckminsterfullerene, C$_{60}$. A rotationally resolved spectrum of C$_{60}$ has to date remained elusive, despite the very intense research into this molecule's chemical and physical properties since its discovery in 1985. Our approach utilizes cyrogenic buffer gas cooling of the output of a 1000 K effusive oven to prepare cold gas phase C$_{60}$ molecules. We subsequently probe these with a difference frequency generation-based frequency comb tuned to the 8.5~$\mu$m IR active fundamental. The combination of a high finesse absorption enhancement cavity and Fourier transform interferometry read-out provide sensitive, broadband detection, while retaining the high spectral resolution of the frequency comb light. We will discuss our preliminary results, which tentatively suggest successful ground state vibrational cooling and observation of resolved rotational fine structure, as well as experimental modifications that we expect to improve the C$_{60}$ number density and internal state cooling efficiency. Issue Date: 06/20/18 Publisher: International Symposium on Molecular Spectroscopy Citation Info: APS Genre: Conference Paper / Presentation Type: Text Language: English URI: http://hdl.handle.net/2142/100830 DOI: 10.15278/isms.2018.WG06 Other Identifier(s): WG06 Date Available in IDEALS: 2018-08-172018-12-12
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