Selecting an Excitation Wavelength for Raman Spectroscopy

December 1, 2016
David Tuschel
David Tuschel

David Tuschel is a Raman applications manager at Horiba Scientific in Edison, New Jersey, where he works with Fran Adar. David is sharing authorship of the "Molecular Spectroscopy Workbench" column with Fran.

Spectroscopy E-Books

Spectroscopy E-Books, Spectroscopy E-Books-12-01-2016, Volume e4, Issue 2

Here, we examine the problem of photoluminescence from the material being analyzed and the substrate on which it is supported. We describe how to select an excitation wavelength that does not generate photoluminescence, reduces the noise level, and yields a Raman spectrum with a superior signal-to-noise ratio. Furthermore, we discuss the phenomenon of resonance Raman spectroscopy and the effect that laser excitation wavelength has on the Raman spectrum.

 

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