Fig. 4: Quasi-three-dimensional characterization of the near-field modes in the CNP.
From: Weak-disturbance imaging and characterization of ultra-confined optical near fields
a PEEM image of a typical ZnO CNP with vertical polarization at different focal planes. b Schematic of the position of the focal plane in the y-z plane of the CNP. The black arrow represents the focal plane. c PEEM image of the ZnO CNP in a with horizontal polarization at different focal planes. All CNPs in Fig. 4 are excited at normal incidence
