تقرير
Anisotropic Photo-Physical Properties of Plexcitons in Strongly Coupled Metal-Organic Thin Films
| العنوان: | Anisotropic Photo-Physical Properties of Plexcitons in Strongly Coupled Metal-Organic Thin Films |
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| المؤلفون: | Rödel, Maximilian, Philipp, Luca Nils, Kim, Jin Hong, Lehmann, Matthias, Stolte, Matthias, Mitric, Roland, Würthner, Frank, Pflaum, Jens |
| سنة النشر: | 2024 |
| المجموعة: | Physics (Other) |
| مصطلحات موضوعية: | Physics - Optics, Physics - Chemical Physics |
| الوصف: | Exciton plasmon polaritons have gained increasing interests over recent years due to their versatile properties emerging by the underlying light-matter coupling and making them potential candidates for new photonic applications. We have advanced this concept by studying thin films of laterally aligned J-type aggregates of self-assembled tetra-bay phenoxy-dendronized perylene bisimide (PBI) molecules, arranged in a helical manner of three strains on a silver surface. As a result of the interaction between the uniformly aligned dipole moments and the surface plasmons of a thin silver layer underneath, the excitonic state at 1.94 eV evolves into dispersions in absorption and emission, both characterized by a distinct anisotropy. The coupling constant defined by the scalar product of the transition dipole moment $\vec{\mu}$ and the surface plasmon wavevector $\vec{k}_x$ shows a pronounced two-fold rotational symmetry with values between almost 0 to 28 meV. Complementary TD-DFT calculations of the angular dependent absorption and photoluminescence provide insights in the coherent energy exchange between the excitonic and plasmonic sub-systems. Additionally, power dependent PL studies yield first evidence that the diffusion length of the coupled exciton-plasmon polaritons exceeds that of the mere Frenkel state in neat PBI by at least one order of magnitude. Our results not only demonstrate the possibility to control the photo-physical properties of strongly coupled states by their spatially anisotropic light-matter interaction but also reveal innovative strategies to influence opto-electronic device operation by the directional transport of hybrid state energy. Comment: 26 pages, 7 figures, 2 tables, Supporting Information |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2409.01210 |
| رقم الأكسشن: | edsarx.2409.01210 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |