SKM 2021 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 2: Topical Session Interface-Dominated Phemomena - Moving Interfaces / Functional Properties
MM 2.6: Vortrag
Montag, 27. September 2021, 12:30–12:45, H8
Optical properties of 3D nanosponge models created by phase-field simulations — •Malte Grunert1, Sebastian Bohm1, Hauke Lars Honig1, Dong Wang1, Jinhui Zhong2, Peter Schaaf1, Christoph Lienau2, and Erich Runge1 — 1Technische Universität Ilmenau, Germany — 2University of Oldenburg, Germany
We present an efficient method for the numerical creation of three-dimensional nanoporous sponge models with specified geometric properties. Such nanoporous structures can be manufactured with different geometric properties and exhibit fascinating optical properties [1,2]. We show how phase-field simulations can be used to obtain nanoporous structures with predefined optical and structural characteristics. The sponge geometries generated in this way show excellent similarity to experimentally produced sponges and the averaged geometric properties are comparable. In addition, the optical properties such as the absorption and scattering cross sections are similar. The computer-generated sponges also exhibit experimentally confirmed optical properties such as strong spatial localization of fields and the associated strong local field enhancement.
[1] G. Hergert, J. Vogelsang, F. Schwarz, D.Wang, H. Kollmann, P. Groß, C. Lienau, E. Runge and P. Schaaf, Long-lived electron emission reveals localized plasmon modes in disordered nanosponge antennas, Light: Science & Applications 6, e17075 (2017).
[2] J. Zhong et al., Nonlinear plasmon-exciton coupling enhances sum-frequency generation from a hybrid metal/semiconductor nanostructure, Nature Communications 11, 1464 (2020)