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FIB–SEM cathodoluminescence tomography: practical and theoretical considerations. Electron tomography and holography in materials science. Handbook of Microscopy for Nanotechnology (Springer, 2006). The reconstruction of a three-dimensional structure from projections and its application to electron microscopy. (ed.) Seismic Tomography (Springer Netherlands, 1987).Ĭrowther, R. Ocean Acoustic Tomography (Cambridge Univ. We demonstrate how cathodoluminescence tomography can be used to achieve nanoscale three-dimensional visualization of light–matter interactions by reconstructing a three-dimensional metal–dielectric nanoresonator.Īrridge, S. The experimental signal can be further correlated with the radiative local density of optical states in particular regions of the reconstruction. The resulting tomograms allow us to locate regions of efficient cathodoluminescence in three dimensions across visible and near-infrared wavelengths, with contributions from material luminescence and radiative decay of electromagnetic eigenmodes. We then use the method of filtered back-projection to reconstruct the cathodoluminescence intensity at each wavelength. We first obtain two-dimensional cathodoluminescence maps of a three-dimensional nanostructure at various orientations. Here, we introduce a tomographic technique-cathodoluminescence spectroscopic tomography-to probe optical properties in three dimensions with nanometre-scale spatial and spectral resolution. However, tomographic techniques that rely on optical excitation or detection are generally limited in their resolution by diffraction. Tomography has enabled the characterization of the Earth's interior, visualization of the inner workings of the human brain, and three-dimensional reconstruction of matter at the atomic scale.
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