Sub-Doppler Stark Spectroscopy in the A-X (1,0) Band of CN

摘要

The effect of external electric fields has been measured in hyperfine-resolved sub-Doppler transitions in the A 2Π-X 2Σ (1,0) band of the CN radical near 10 900 cm-1. Static electric fields less than 1 kV/cm are sufficient to mix the most closely spaced Λ-dpublets in the A state, leading to Stark spectra with both new and shifted resonances. Simulations of the saturation-dip Stark spectral line profiles allow extraction of the A-state permanent electric dipole moment with a magnitude of 0.06 ( 0.02 D.