Polarization spectroscopy of a velocity-selected molecular sample

Abstract

This Letter demonstrates polarization spectroscopy of a velocity selected and vibrationally excited molecular sample. Specifically, the anisotropy induced by a circularly polarized IR pump beam tuned to the R(14.5)(1/2)v=1←v=0 transition of nitric oxide is observed using an IR probe resonant with the R(15.5)(1/2)v=2←v=1 hot band transition. Using two detectors in combination with the rapidly swept probe allows both the absorptive and dispersive components of the excited state polarization to be observed for the first time. The data are well described by simulations based upon a three-level density matrix model.

Investigation on the Cs 6S1=2 to 7D electric quadrupole transition via monochromatic two-photon process at 767 nm

“…Further, the measurement of the excited states hyperfine splitting can help in the construction and modification of the atomic wave functions [7], which is beneficial for understanding the atomic structure and fundamental physics. The hyperfine coupling constants measurement is achieved by using the high precision spectroscopy technology, which has various presentations such as saturated absorption spectroscopy [8], polarization spectroscopy [9], electromagnetically induced transparency [10], and two-photon transition spectroscopy [11].…”

Velocity selection in a Doppler-broadened ensemble of atoms interacting with a monochromatic laser beam

“…Later, more involved models of polarization spectroscopy were developed, emphasizing the importance of a careful treatment of the effects of atomic velocity (13 -15 ). Velocity-selective polarization spectroscopy remains an active topic in atomic (16 ) and molecular physics (17 ); the importance of Doppler averaging in calculating the medium's response in pump-probe laser spectroscopy is well known (18 ).…”