What Is Raman Spectroscopy

Raman spectroscopy is a molecular spectroscopic technique that relies on the inelastic scattering of monochromatic light in molecular structures. The incident laser light changes the vibration modes of the molecules, and during this process, the molecules will emit light at higher and/or lower wavelengths relative to the excitation wavelength (called Stokes or Anti-Stokes shifts). Each material has its own specific Raman spectrum. Raman scattering can, therefore, be used to identify and quantify the presence and composition of various substances.

See an example of a Raman spectrum measured with one of our Raman spectrometers here.

You can use our Raman Waveshift calculator to convert between Raman shift in inverse centimeters and wavelength in nm. 

Raman Spectroscopy Instrumentation

We have made a guide that lists some of the key things you should consider if you are going to design a Raman Instrument.

Raman Instrumentation

The three parts you will need for Raman instrumentation are:

Read the full guide here.

How to Select a Handheld Raman Spectrometer

Raman spectroscopy is experiencing strong growth in the form of handheld and compact portable instruments. This puts demanding requirements on instrument size, weight, and power that cannot be met by high-end, laboratory bench-top Raman systems.

The main factors that influence the spectrometer’s overall size are the diffraction grating groove density and detector size.

Read more about how to select the right handheld Raman spectrometer here.