[16a-P08-1~12] 3.12 Nanoscale optical science and near-field optics

[16a-P08-3] Chiral emission and relative phase mapping of spherical nanoparticle by fully polarimetric four-dimensional cathodoluminescence

〇Taeko Matsukata^1,2, F. Javier Garcia de Abajo^3,4, Takumi Sannomiya^1,5 (1.Tokyo Tech., 2.RIKEN, 3.ICFO, 4.ICREA, 5.JST PRESTO)

Keywords:chirality, phase measurement, cathodoluminescence

Structurally achiral nanoantennas have recently attracted attention as CPL emitters by externally breaking the mirror symmetry through excitation or detection geometry. Cathodoluminescence (CL) combined with scanning transmission electron microscope (STEM) can break the mirror symmetry of measurement system in the x-y, y-z, z-x plane, and enable electric field mapping with high resolution. In this presentation, we demonstrate chiral light emission even from a sphere, or the most symmetric structure, as well as visualization of relative phase distributions using a newly developed fully polarimetric 4-dimensional STEM-CL.