Terms such as spontaneous Raman spectroscopy or normal Raman spectroscopy summarize Raman spectroscopy techniques based on Raman scattering by using normal far-field optics as described above.
This inelastic scattering is the Raman effect, first described by physicist C.V. Raman in 1928. The energy exchange happens because the photon either gives energy to the molecule (leaving it in a higher vibrational state) or takes energy from it (if the molecule was already vibrating).
Raman spectroscopic analysis is based on the Raman scattering effect discovered by Indian scientist C.V. Raman (Raman) and analyzes the scattering spectrum with different frequencies from the incident light to obtain information on molecular vibration and rotation.
Raman spectroscopy is an optical technique that detects intrinsic vibrational, rotational and other low-frequency modes in molecules upon inelastic scattering of monochromatic light.
Learn about Raman spectroscopy—What is Raman spectroscopy? How does Raman spectroscopy work? Learn the fundamentals of Raman, including the Raman effect and Raman scattering, the advantages and disadvantages of Raman, and more.
Raman spectroscopy is a powerful tool for determining chemical species. As with other spectroscopic techniques, Raman spectroscopy detects certain interactions of light with matter.
In the following sections, the fundamental physics that underpins the spontaneous Raman effect, stimulated- and coherent Raman spectroscopy, SERS and TERS are detailed in the context of their applications. Experimental considerations are discussed, and examples of Raman spectroscopy instrumentation setups are presented.
Since Raman uses visible laser light, a Raman spectrum can be obtained through any kind of packaging that visible light can go through. This means substances inside glass bottles, plastics bags, or other transparent containers can be analyzed without opening the packaging.