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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)