Detection and characterization of attenuated multimode waveguiding in SiO2 slabs using photoemission electron microscopy

Klick, Alwin; Wagner, René; Großmann, Malte; Kadem, Laith F.; Leißner, Till; Rubahn, Horst-Günter; Selhuber-Unkel, Christine; Bauer, Michael

Multimode waveguiding in the visible and near-ultraviolet spectral regime is observed and characterized in thermally grown SiO 2 layers on silicon using photoemission electron microscopy (PEEM). Comparison with finite-element-method simulations allows identifying order and character of the attenuated modes. Real-time investigations on mode propagation support these findings and give additional evidence for the existence of radiative modes. Finally, the presented experimental results illustrate how a defined deposition of gold nanoparticles can substantially enhance the sensitivity of the PEEM technique to electromagnetic field modes supported by thin dielectric and insulating layers.

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Klick, Alwin / Wagner, René / Großmann, Malte / et al: Detection and characterization of attenuated multimode waveguiding in SiO2 slabs using photoemission electron microscopy. 2018.

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