Tuning Hybrid exciton–Photon Fano Resonances in Two-Dimensional Organic–Inorganic Perovskite Thin Films
| Autor: | Yun Liu, Shaun M Gallagher, Franziska Muckel, David S. Ginger, Kathryn N. Guye |
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| Rok vydání: | 2021 |
| Předmět: |
Silver
Photon Materials science Exciton Nanophotonics Metal Nanoparticles Physics::Optics Bioengineering Condensed Matter::Materials Science General Materials Science Thin film Plasmon Elektrotechnik Perovskite (structure) Titanium Spin coating business.industry Mechanical Engineering Fano resonance Oxides General Chemistry Calcium Compounds Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Condensed Matter Physics Optoelectronics business |
| Zdroj: | Nano Letters. 21:6124-6131 |
| ISSN: | 1530-6992 1530-6984 |
| DOI: | 10.1021/acs.nanolett.1c01504 |
| Popis: | As easy-to-grow quantum wells with narrow excitonic features at room temperature, two-dimensional (2D) Ruddleson-Popper perovskites are promising for realizing novel nanophotonic devices based on exciton-photon interactions. Here, we demonstrate a distinct hybrid exciton-photon Fano resonance in (C4H9NH3)2PbI4 thin films prepared via spin coating. Using a classical coupled-oscillator model and finite-difference time-domain simulations, we link the Fano interference to the coupling of the exciton with the Rayleigh-like scattering of the film microstructure. Combining colloidal plasmonic cavities with the 2D perovskite films, we demonstrate tuning of the Fano resonance. In combination with silver nanoparticles, the exciton-photon Fano interference couples to the in-plane plasmonic modes with indications of Rabi splitting. By creating a nanoparticle on mirror geometry, we address the out-of-plane excitonic component, reaching an intermediate coupling regime. These structures suggest possible photonic targets for biomolecular self-assembly applications. |
| Databáze: | OpenAIRE |
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