[13p-2E-1~16] 3.1 Basic optics and frontier of optics

[13p-2E-2] Spatial Resolution Enhancement in Confocal Imaging using Longitudinal Electric Field

〇Yuichi Kozawa¹, Ryota Sakashita¹, Shunichi Sato¹ (1.IMRAM, Tohoku Univ.)

Keywords:Radial polarization,Confocal microscopy,Longitudinal electric field

In this study, we report a new method to improve the detection efficiency of the scattered field caused by the longitudinal component of a tightly focused beam by means of the polarization conversion of the scattered field. By applying this method to confocal imaging, we present the possibility of the spatial-resolution enhancement in the confocal imaging when we tightly focus a higher-order radially polarized beam, which can produce a smaller focal spot at the focus.