Derivation of the optical autocorrelation function from Raman scattering of diffusing particles

作者：Nishida Maki; Van Keuren Edward R^*

来源：Journal of Modern Optics, 2012, 59(2): 102-105.

DOI：10.1080/09500340.2011.631053

• autocorrelation function
• Raman scattering
• multicomponent nanoparticles
• particle sizing
• temporal coherence

Raman scattering is an inelastic scattering process with chemical specificity to molecular bonds. Because it is a coherent process, the autocorrelation function of its intensity fluctuations can be treated similarly as in the case of the quasi-elastic scattering that is the basis of photon correlation spectroscopy (PCS). This article discuses the possibility of such a new optical characterization method, Raman correlation spectroscopy (RCS). If the phase behavior of Raman scattering is constant or slow enough compared to the diffusion of particles in a dispersion, RCS can work as a variation of PCS with similar instrumentation as PCS and could become a useful addition for nanoparticle characterization research. This article also discusses the effect of incoherent fluorescence in the data analysis of RCS.

• 出版日期2012