Toward Single Molecular-Ion Spectroscopy


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  • Speaker: Brian Odom (Northwestern)
  • Host Department: Physics
  • Date: 02/05/2013
  • Time: 4:00 PM - 5:00 PM

  • Location: 335 West Hall

  • Description:

    Precision of the best molecular spectroscopy is currently orders of
    magnitude behind atomic ion spectroscopy, owing primarily to
    challenges in molecular state preparation and readout.  Applications
    of improved molecular spectroscopy would include searches for
    time-variation of fundamental constants, parity violation studies, and
    searches for fundamental electric dipole moments. Our group at
    Northwestern University is developing the necessary tools to perform
    clock-quality spectroscopy on single trapped molecular ions. We are
    currently working with species having semi-closed electronic cycling
    transitions, so that optical pumping into the rotational ground state
    can be achieved by pulse-shaping of a resonant femtosecond laser.  I
    will also describe a simple readout technique we are developing to map
    the internal molecular state onto a co-trapped atomic ion, using a
    pulsed radiation pressure force to excite secular motion.