Presentation Information
[8p-PA1-3]Particle-size dependence of depolarization spectra in circularly polarized light scattering
〇(M1)Kyosuke Murata1, Koki Kasama1, Mike Raj Maskey1, Miyu Kimura1, Nozomi Nishizawa1 (1.Kitasato Univ.)
Keywords:
circularly polarized light,light scattering,fine particle measurement
When circularly polarized light is incident on an aqueous suspension, scattering occurs with particles, causing the polarization state to gradually relax and be emitted externally as scattered light. The depolarization of circularly polarized light due to scattering is highly dependent on wavelength and particle size. Therefore, selecting an appropriate wavelength is crucial for detecting differences in particle size. Reported in this paper that the wavelength and particle size dependencies of circular depolarization using a double-lock-in system for highly sensitive circular polarization measurement, employing monodisperse particles with a narrow particle size distribution. The results show that the change in circular polarization with respect to particle size is not monotonic. This indicates that depolarization in the Mie scattering region strongly depends on the size parameter, which is the ratio of wavelength to particle size.