SKM 2023 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 52: Focus: Self-Assembly of Plasmonic Nanostructures (joint session CPP/HL)
HL 52.6: Vortrag
Freitag, 31. März 2023, 11:00–11:15, GÖR 226
Self-assembled plasmonic metasurfaces for sensing and photocatalysis — •Olha Aftenieva1 and Tobias A.F. König1,2 — 1Leibniz-Institute for Polymer Research Dresden, Hohe Straße 6, 01169 Dresden, Germany — 2Center for Advancing Electronics Dresden (cfaed), Technische Universität Dresden, 01062 Dresden, Germany
Self-assembly of colloids allows for robust and tunable manufacturing over centimeter-scaled areas. Here we present the soft lithographic approach for creating plasmonic lattices and demonstrate their usage for sensing applications and photocatalysis. First, a particular case of collective out-of-plane resonant coupling is considered. Such resonances are excited solely under oblique illumination with transverse magnetic polarization and provide field enhancement in the area above the metasurface that is easily accessible to an analyte and is particularly sensitive to the changes in the refractive index. On the other hand, we realize imprinting of such periodic plasmonic lattices on functional substrates, including glass, silicon wafers, carbon, gold, semiconductor, or polymer thin films, illustrating the versatility of the colloidal approach. In particular, the combination of titanium dioxide thin waveguiding layers and plasmonic metasurface gives rise to narrow-bandwidth guided plasmon-polariton modes. Moreover, it induces the generation of hot charge carriers and enhances photocatalytic processes. Thus, colloidal self-assembly of plasmonic metasurfaces presents an application-oriented approach that is of potential use for optical sensors, photonic circuit applications, or hybrid device manufacturing.