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We present the first study of cuticles and compressions of fossil leaves by Focused Ion Beam Scanning Electron Microscopy (FIB‐SEM). Cavities preserved inside fossil leaf compressions corresponding to substomatal chambers have been observed for the first time and several new features were identified in the cross‐section cuts. These results open a new way in the investigation of the three‐dimensional...
We report on recently achieved theoretical and experimental results concerning nonlinear optical effects in micro and nano structures. We considered second order nonlinearities mainly focusing on second harmonic generation and entangled photon pairs emission by spontaneous parametric down conversion. Different geometries have been investigated: multilayer dielectric stacks, metallo-dielectric stacks,...
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