2D spectroscopy involves the interaction of laser pulses with a sample to generate a 2D spectrum. Typically, the process starts with a series of ultrafast laser pulses that excite the material. The emitted signals are then measured as a function of two independent frequency axes, resulting in a 2D plot. This plot shows how different frequency components of the material are coupled or correlated, providing insights into energy transfer, coherence, and other dynamic processes.
