Molecular and Laser Spectroscopy

This work discusses and analyzes various spectroscopic effects in relation to the interaction mechanisms of molecules with laser fields. The contents are organized according to the aspects of molecular spectra that reflect intra- and inter-molecular interactions and the influence of the molecular environment. After a brief summary of molecular energy levels and spectra, the discussion centres round molecular spectroscopy, with treatments of the coarse and fine structures of molecular two-photon spectra, Doppler-free spectra via non-linear uncoupling interactions of lasers with molecules, the spectral effects of non-linear coupling interactions of lasers with molecules and methods of selective simplification and identification of molecular spectra. The theory is given throughout in terms of the density matrix equations. Concepts are illustrated by examples based on simple molecules.