The precision laser methods development for quantitative polarization-optical analysis of condensed matter (overview)

This overview presents the results of studies carried out in the IAP RAS aimed at further development of laser methods of quantitative polarization-optical analysis of condensed matter [1-4]. The main attention is paid to the research of the polarization-optical characteristics of magnetic nanofluids in a wide range of concentrations. Experimental data obtained for nanofluids based on magnetite in kerosene show that the developed approaches and their experimental implementation are able to provide a very high sensitivity, which allows to perform experiments with magnetic nanofluids in terms of very significant dilution. The highest dilution in which polarization responses were reliably recorded corresponds to the concentration of the solid (magnetic) phase 10-6. The obtained data also indicate a common generation process for magneto-optical responses in the studied concentration range [5]. In the theoretical part of the overview, comparative studies of the polarization properties of diluted magnetic nanofluids and ensembles of point-like scatters are described...