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O: Fachverband Oberflächenphysik

O 43: Plasmonics and Nanooptics III: Periodic Structures and Theory

O 43.4: Vortrag

Dienstag, 17. März 2020, 11:15–11:30, WIL A317

Perturbation theory as an efficient tool for modelling chiral and achiral plasmonic sensors — •Steffen Both, Harald Giessen, and Thomas Weiss — 4th Physics Institute and Research Center SCoPE, University of Stuttgart

Plasmonic nanostructures comprise optical resonances with strong electromagnetic near-fields. If we place chemical substances in these near-fields, even tiny amounts of the substance can have dramatic effects on the resulting spectral responses. This effect is the key to various kinds of sensing applications. Conventionally, the theoretical modelling of such interactions utilizes extensive numerical simulations. As we have recently shown [1,2], an alternative approach consists in the use of perturbation theories, which provide the benefit of drastically reduced computational times and allow to gain deep insights into the underlying physical mechanisms. Here, we discuss this approach especially with regard to applications in chiral sensing [3].

[1] T. Weiss, et al., Phys. Rev. Lett. 116, 237401 (2016).

[2] S. Both and T. Weiss, Opt. Lett., accepted (2019).

[3] M. Nesterov et al., ACS Photonics 3, 578 (2016).