Hyper Raman Scattering
Hyper Raman scattering is a modified version of Raman scattering, where the scattered light occurs at frequencies somewhat lower than twice the frequency of the pump light. This means that two pump photons are converted into one photon of Raman scattered light and one phonon. This effect is usually fairly weak, but it has aspects which make it interesting for Raman spectroscopy. In particular, hyper-Raman spectra can provide vibrational information on molecules where ordinary Raman scattering is suppressed due to symmetry issues (silent modes, non Raman-active modes). The scattering rate can be substantially enhanced near optical surfaces.
Questions and Comments from Users
Here you can submit questions and comments. As far as they get accepted by the author, they will appear above this paragraph together with the author’s answer. The author will decide on acceptance based on certain criteria. Essentially, the issue must be of sufficiently broad interest.
Please do not enter personal data here; we would otherwise delete it soon. (See also our privacy declaration.) If you wish to receive personal feedback or consultancy from the author, please contact him e.g. via e-mail.
By submitting the information, you give your consent to the potential publication of your inputs on our website according to our rules. (If you later retract your consent, we will delete those inputs.) As your inputs are first reviewed by the author, they may be published with some delay.