Cathodoluminescence excitation spectroscopy: Nanoscale imaging of excitation pathways

  title={Cathodoluminescence excitation spectroscopy: Nanoscale imaging of excitation pathways},
  author={Nadezda Varkentina and Yves Auad and Steffi Y. Woo and Alberto Zobelli and Laura Bocher and Jean-Denis Blazit and Xiaoyan Li and Marcel Tenc{\'e} and Kenji Watanabe and Takashi Taniguchi and Odile St{\'e}phan and Mathieu Kociak and Luiz Henrique Galv{\~a}o Tizei},
  journal={Science Advances},
Following optical excitations’ life span from creation to decay into photons is crucial in understanding materials photophysics. Macroscopically, this is studied using optical techniques, such as photoluminescence excitation spectroscopy. However, excitation and emission pathways can vary at nanometer scales, preventing direct access, as no characterization technique has the relevant spatial, spectral, and time resolution. Here, using combined electron spectroscopies, we explore excitations… 

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