|Title||Rovibrational quantum state resolution of the C60 fullerene|
|Publication Type||Journal Article|
|Year of Publication||2019|
|Authors||P. Changala, B, Weichman, ML, Lee, KF, Fermann, ME, Ye, J|
|Pagination||49 - 54|
|Keywords||buffer-gas cooling, molecules, spectroscopy|
The unique physical properties of buckminsterfullerene, C60, have attracted intense research activity since its original discovery. Total quantum state–resolved spectroscopy of isolated C60 molecules has been of particularly long-standing interest. Such observations have, to date, been unsuccessful owing to the difficulty in preparing cold, gas-phase C60 in sufficiently high densities. Here we report high-resolution infrared absorption spectroscopy of C60 in the 8.5-micron spectral region (1180 to 1190 wave number). A combination of cryogenic buffer-gas cooling and cavity-enhanced direct frequency comb spectroscopy has enabled the observation of quantum state–resolved rovibrational transitions. Characteristic nuclear spin statistical intensity patterns confirm the indistinguishability of the 60 carbon-12 atoms, while rovibrational fine structure encodes further details of the molecule’s rare icosahedral symmetry.