title: Probe of Rydberg-Atom Transitions via an Amplitude-Modulated Optical Standing Wave with a Ponderomotive Interaction.
abstract: In ponderomotive spectroscopy an amplitude-modulated optical standing wave is employed to probe Rydberg-atom transitions, utilizing a ponderomotive rather than a dipole-field interaction. Here, we engage nonlinearities in the modulation to drive dipole-forbidden transitions up to the fifth order. We reach transition frequencies approaching the sub-THz regime. We also demonstrate magic-wavelength conditions, which result in symmetric spectral lines with a Fourier-limited peak at the line center. Applicability to precision measurement is discussed.
authors.affiliation: Applied Physics Program and Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA.
authors.forename: K R
authors.initials: KR
authors.lastname: Moore
authors.affiliation: Applied Physics Program and Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA.
authors.forename: G
authors.initials: G
authors.lastname: Raithel