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O: Fachverband Oberflächenphysik

O 7: Plasmonics and Nanooptics I

O 7.8: Talk

Monday, March 18, 2024, 12:15–12:30, MA 043

Highly polarization dependent formation of polaritons due to molecular alignment — •Roland Schäfer, Philipp Weitkamp, Dirk Hertel, Klaus Meerholz, and Klas Lindfors — Department für Chemie, Universität zu Köln, 50939 Köln, Germany

Spin cast films of HB238 [1] aggregate, forming both a J- and H-like transition that have a high polarization dependence, because the J-transition is located in the substrate plane, while the H-transition is located in the surface normal. In our previous work we have shown that both transitions can be simultaneously strongly coupled to planar microcavites, forming four polaritons. The two H-polaritons are highly polarization dependent.[2]

By aligning the aggregates along one direction, we achieve strong polarization dependence for both the J- and H-transition, enabling us to control the strong coupling behavior of both transitions by polarization.

[1] Bürckstümmer, et al., Angew. Chem. Int. Ed. 2011, 50: 11628-11632.

[2] Schäfer, et al., ACS Photonics, in press.

Keywords: H-transition; J-transition; Strong coupling; Polarization; Simultaneous coupling