Dresden 2026 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 96: Plasmonics and nanooptics: Fabrication, characterization and applications

O 96.12: Vortrag

Freitag, 13. März 2026, 12:15–12:30, HSZ/0403

Self-assembled dielectric network metamaterials based on vanadium oxide — •Marcello Pozzi¹, Jeremi Setz¹, Noel von Wattenwyl¹, Georg Haberfehlner², Arnold Müller³, Ralph Spolenak¹, and Henning Galinski¹ — ¹Laboratory for Nanometallurgy, ETH Zürich, Switzerland — ²FELMI-ZFE, TU Graz, Austria — ³Laboratory of Ion Beam Physics, ETH Zürich, Switzerland

Among scalable optical nanomaterials, network metamaterials stand out because of their large-area compatibility, versatility and low footprint. These systems are created by self-assembly in a reaction-diffusion process called "chemical dealloying", resulting in complex network structures with broadband optical response driven by plasmonic mode equipartition [1]. Typical network metamaterials consist of noble metallic elements and show plasmonic behavior. Here we propose a material system that extends the design space of network metamaterials to dielectrics. Using magnetron co-sputtering of aluminum-vanadium followed by chemical dealloying, we fabricate network metamaterials based on vanadium oxide. Through the combination of Rutherford backscattering spectroscopy (RBS) and focused ion beam (FIB) tomography we analyze the dynamics of pattern formation, while the light-matter interaction is studied combining full-wave simulations and various spectroscopy techniques. Finally, we determine the degree of hyperuniformity of the dielectric networks by measuring the scaling behavior of the volume fraction variance of the systems.

[1] Adv. Optical Mater. 2023, 11, 2300568

Keywords: Optical metamaterials; Self-assembly; Dielectrics; Hyperuniformity; Vanadium oxide