transient absorption spectroscopy

Transient absorption spectroscopy is a technique used to study how molecules respond to light over very short timescales. A brief laser pulse excites the molecules, raising them to a higher energy state. Then, a second probe pulse measures how their absorption of light changes over time, revealing details about how quickly molecules return to normal or undergo chemical changes. This method helps scientists understand dynamic processes in materials, like how energy moves in solar cells or how proteins respond to light, providing insights into the behavior of molecules in real-time.