[20p-P1-1~7] 3.1 Basic optics and frontier of optics

[20p-P1-7] Study on the Focusing of Higher-order Radially Polarized Beams with Aberration

〇Yuichi Kozawa^1,2, Shunichi Sato¹ (1.IMRAM Tohoku Univ., 2.JST PRESTO)

Keywords:Radial polarization,Super resolution

We report the effect of aberration on the focusing property of higher-order radially polarized beams for the tight focusing condition using an objective lens with high numerical aperture. For example, for the focusing with a water-immersion object lens, the spherical aberration caused by improper coverslip thickness strongly degrades the smaller focal spot characteristics of higher-order radially polarized beams.