Nanoscale optical tomography with cathodoluminescence spectroscopy

Stanford researchers have developed a novel tomographic technique, cathodoluminescence (CL) spectroscopic tomography, to probe optical properties in 3D with nanometer-scale spatial and spectral resolution. These tomograms can locate regions of efficient cathodoluminescence across visible and near- infrared wavelengths in three dimensions, with contributions from material luminescence and radiative decay of electromagnetic eigenmodes.
This CL tomography technique has been demonstrated by reconstructing a 3D metal-dielectric metamaterial resonator, illustrating how the technique can be applied to almost any materials system to achieve label-free, nanoscale 3D visualization of light-matter interactions.

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Stage of Research