Excited-state Structure and Dynamics of Nitric Oxide probed by Resonant Four-wave Mixing Techniques

Abstract

We review the results from two experiments that used resonant four-wave mixing (RFWM) techniques to investigate double-resonance transitions in NO. In the first experiment, laserinduced grating decay curves that reveal quantum beats due to the hyperfine structure of the A 2I:, v' = 0 state were observed and interpreted. In the second, multistate interactions between the L 2rr 1/ 2,3/2, v = 8 and Q 2rr1/ 2,3/2,V = 0 states were investigated, and new assignments were made. The results highlight the potential of RFWM techniques for probing excited-state physics.

Dynamics of Rydberg states of nitric oxide probed by two-color resonant four-wave mixing spectroscopy

“…44 In NO, TC-RFWM has been used in an investigation of the predissociative linewidths of the M 2 ⌺ ϩ , vϭ1 and H 2 ⌺ ϩ , HЈ 2 ⌸, vϭ2 Rydberg states and the non-Rydberg B 2 , vϭ26 state; 45 in the determination of energies and rotational constants for several vϭ0 high Rydberg states; 46 and in a study of the multistate interactions between the B 2 ⌸, vϭ28 and L 2 ⌸, vϭ8 valence states, and the Q 2 ⌸, vϭ0 Rydberg state. 47,48 The TC-RFWM techniques have received attention because they have several valuable attributes. Unlike excitedstate detection by the fluorescence-dip method, the RFWM techniques produce a zero-background signal and do not require the state of interest to have a significant fluorescence quantum yield.…”