Hyper-Raman macro- and micro-spectroscopy in materials: Towards high quality signals and good spatial resolution

We have developed two bright hyper-Rayleigh/hyper-Raman spectrometers that allow the collection of spontaneous signals with high-quality and good spatial resolution. The first macro-spectrometer has been addressed to the study of liquids. The second is a new and original micro-spectrometer which has been designed to study solid and interface media. The micro-hyper-Raman spectrometer opens new fields of investigation since it provides vibrational informations, on IR-active but Raman-inactive modes, at the micrometer scale. Thus, the combination of Raman and hyper-Raman methods accomplishes high spatial resolution vibrational micro-spectroscopy.