Raman spectroscopy

![Comparison of topographical (AFM, top) and Raman images of GaSe. Scale bar is 5 μm.[23]](/uploads/202502/06/AFM_vs_Raman_imaging_of_GaSe5143.jpg)
Raman spectroscopy (/ˈrɑːmən/; named after Sir C. V. Raman) is a spectroscopic technique used to observe vibrational, rotational, and other low-frequency modes in a system. Raman spectroscopy is commonly used in chemistry to provide a fingerprint by which molecules can be identified.