DOUBLE-RESONANCE LASER-INDUCED GRATING SPECTROSCOPY OF NITRIC-OXIDE

Double-resonance laser-induced grating spectroscopy (LIGS), including two-color laser-induced grating spectroscopy (TC-LIGS) and degenerate four-wave mixing (DFWM) spectroscopy, has been used to probe the E 2SI GMA, nu = 0 <-- A 2SIGMA, nu' = 0 <-- X 2PI1/2, nu'' = 0 double-resona nce transitions in NO. Several different double-resonance schemes have been implemented and their relative merits are discussed. The results demonstrate that double-resonance LIGS shows considerable promise for obtaining state-selective absorption spectra of rovibronically excite d states for a wide variety of molecules.