Fig 3
From: ZnO-Based Microcavities Sculpted by Focus Ion Beam Milling
a Temperature-dependent CL spectra of a ZnO MC. b Monochromatic CL image of the ZnO MC. Representative CL spectra recorded from the side region and the center region of the ZnO MC. The local excitation is indicated by red and green circles in monochromatic CL image. Inset of b is the lateral spread of the interaction volume of the electron beam at 15 kV with a scale bar of 2 μm. There is a significant difference of emission between the side and the center regions