by S H Lin (Arizona State University), A A Villaeys (Université Louis Pasteur), & Y Fujimura (Tohoku University)

In view of the rapid growth in both experimental and theoretical studies of multiphoton process and multiphoton spectroscopy of atoms, ions and molecules in chemistry, physics, biology, materials science, etc., it is desirable to publish an advanced series that contains review papers readable not only by active researchers in these areas, but also by those who are not experts in the field but who intend to enter the field. The present series attempts to serve this purpose. Each review article is written in a self-contained manner by the experts in the area so that the readers can grasp the knowledge in the area without too much preparation.

• The Theories of Stationary and Time-Dependent Wave Operators and Their Applications in Photochemistry (G Jolicard & J Périé)
• Resonant Two-Photon Ionization Studies of C₆H₆-X_n Clusters (A W Garrett et al.)
• Master Equations in Quantum Optics: Some Generalizations (G Gangopadhyay & D S Ray)
• Kinetic Application of Surface Nonlinear Optical Signals (S R Meech)
• Novel Measuring Methods of Femtosecond Dynamics of Nonlinear Optical Responses (T Kobayashi)