エバネッセント波を用いたナノ分解能レーザードップラー計測システムの開発

抄録

We develop a measurement system for evaluating dispersion stability of colloidal liquids for thermal storage. The measurement principle is based on laser Doppler technique using a pair of evanescent waves created in the vicinity of the interface between solid and liquid. The use of evanescent waves can achieve a spatial resolution in the range of nanometers. In this paper, we report on the latest state of the development of the measurement system. The design concept of the system is explained and the measurement principle is provided. We built a prototype setup for initial experiment. The evanescent waves were generated and formed to a measurement volume at the surface of a flat glass plat. We experimentally confirmed the formation of the evanescent waves. Signals were obtained by using a solid material in the measurement volume near the interface.