A Raman spectrum is the unique fingerprint of a material. It can provide qualitative and quantitative information.
The bands shifted to higher wavenumbers (blue shifted) are called anti-Stokes Raman bands and those shifted to lower wavenumbers (red shifted) are called Stokes Raman bands. Usually, the intensities of the Stokes-shifted Raman bands are more intense and therefore used for qualitative and quantitative analysis.
In addition to the chemical compound distribution, there are further properties that can be derived from the Raman spectrum:
- The peak intensity gives information about the quantity of a specific compound
- A peak shift can identify stress and strain states
- The peak width reveals the degree of crystallinity
- The polarization state provides information regarding crystal symmetry and orientation