principles are applied in the detection methodology described herein electromagnetic radiation refers to the composite transmission of a mutually perpendicular electric and magnetic fields of some relative energy energy in the electromagnetic field is comprised of discrete units which have been described as photons when an electromagnetic field is incident on a molecule most of these photons are elastically scattered having the same energy and wavelength as the incident photons but about one photon out of every 10 7 ten million photons are inelastically scattered and produce wavelengths that are different from the wavelength incident on the molecular structure usually they are longer in wavelength than the incident ray that process which describes inelastic scattering is referred to here as raman scattering raman scattering can occur with a change in the vibrational rotational or electronic energy of a molecule the difference between the energy of the incident photon and the raman photon is equal to the vibrational energy of the scattering molecule the raman spectrum is constructed from the intensity of the scattered emission compared to the energy difference several embodiments of the present system utilizes raman scattering thus when the incident photon interacts with the electric dipole of the molecule the resulting emissions constitute the raman effect in terms of classical physics that interaction would be described as a perturbation of the molecular electric field however in quantum physics the raman scattering effect refers to the effect of a particle excursion to an altered state of excitation energy thus having coincident lower excitation with a change in.