A Review on Raman Rays with Respect to Raman Spectroscopy

Authors: Nair S* and John S

DOI: 10.23880/ijfsc-16000158

Volume 4, Issue 1

Abstract

Raman Spectroscopy, one of the most leading technology uses a laser light source to irradiate a sample, and generates an infinitesimal amount of Raman scattered light, which is detected as a Raman spectrum using a CCD camera. To know about the working of Raman Spectroscopy, first the knowledge of Raman Effect is important. Light interacts with matter in different ways like refraction, absorption and reflection. Refracted light changes direction while absorbed photons disappear, giving off their energy to the absorbing material. During reflection light bounces off the surfaces of materials. If you think of light in terms of photons, reflection from surfaces is a type of scattering. The easiest way to explain Raman effect is that photons sometimes have a tendency to emit at a lower or higher energy than their incident state. When a photon is scattered from a molecule it is scattered elastically. A very few percent of the photons scatter inelastically. The elastic scattering of photons is known as Rayleigh scattering and the inelastic scattering of photons is known as Raman scattering. And this paper we are going to discuss in detail how Raman Effect has application in Raman Spectroscopy.

Keywords: Lasers; Molecular Vibrations; Polarizability; Raman Effect; Raman Spectroscopy

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