femtosecond spectroscopy

Femtosecond spectroscopy is a technique used in physical chemistry to study extremely fast chemical reactions and physical processes. It employs ultra-short pulses of light, typically lasting only a few femtoseconds (10^-15 seconds), to initiate a reaction and then probe its subsequent changes.1

This method allows scientists to observe events at the molecular level that occur too rapidly for conventional techniques. By precisely controlling the timing between an initial excitation pulse and a subsequent probe pulse, researchers can capture snapshots of molecular transformations, such as changes in chemical bonds. This has been crucial for understanding the fundamental dynamics of chemical reactions and physical phenomena that occur on incredibly short timescales.12