Stimulated Raman Scattering in Photonic Crystals Infiltrated with Raman-Active Liquids

Abstract

Under ruby-laser excitation, we register stimulated Raman scattering (SRS) in different liquids, which are active in Raman scattering (water, ethanol, acetone) and are infiltrated into pores of synthetic opal matrices. We show that the SRS conversion efficiency is essentially higher than that for corresponding bulk materials. We demonstrate the possibility to use such a method for the determination and spectral analysis of small amounts of substances. In the samples under study, we observe the fine structure of the first SRS component coinciding in frequency with the spectral shift of stimulated low-frequency Raman scattering of light in an opal matrix caused by the transmission of vibrations from silica globules forming the opal matrix.