What are the advantages of UV Raman?

Like using NIR wavelengths, there are sometimes advantages in using wavelengths of much higher energy, (shorter UV wavelengths).

UV Raman is still quite a sophisticated technique, for one the laser beams are invisible and thus more difficult to work with, and for another the most reliable UV lasers are still large, expensive and complex units (typically the FreD Ar+ lasers).

So why use UV Raman?

Using wavelengths in the UV range for say semiconductor analysis can be a useful technique in controlling the penetration depth of the laser into the sample material.

Often the further one moves into the UV the less the laser will penetrate into these types of samples, and hence, the more controlled the sampling can be in the top surface layer. This approach works well in SOI (silicon on insulator) analysis , where the top SI cap layer can be analyzed by using UV Raman, whilst, the bulk material may be analyzed by visible laser wavelengths which will penetrate to a greater depth within the material.

Similarly, using UV raman to resonantly enhance biological materials can often prove a successful way of obtaining information on proteins and DNA structures, which would otherwise be difficult if a standard visible laser were used.

So, UV Raman can have some specific applications where it can be invaluable.