Wang, Y., Tian, J., Klein, M., Adamo, G., Ha, S. T., & Soci, C. (2023). Directional Emission from Electrically Injected Exciton–Polaritons in Perovskite Metasurfaces. Nano Letters, 23(10), 4431–4438. https://doi.org/10.1021/acs.nanolett.3c00727
Abstract:
We present a new approach to achieving strong coupling between electrically injected excitons and photonic bound states in the continuum of a dielectric metasurface. Here a high-finesse metasurface cavity is monolithically patterned in the channel of a perovskite light-emitting transistor to induce a large Rabi splitting of ∼200 meV and more than 50-fold enhancement of the polaritonic emission compared to the intrinsic excitonic emission of the perovskite film. Moreover, the directionality of polaritonic electroluminescence can be dynamically tuned by varying the source-drain bias, which induces an asymmetric distribution of exciton population within the transistor channel. We argue that this approach provides a new platform to study strong light–matter interactions in dispersion engineered photonic cavities under electrical injection and paves the way to solution-processed electrically pumped polariton lasers.
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Funding Info:
This research / project is supported by the A*STAR - AME programmaticc grant on Nanoantenna Spatial Light Modulators for Next-Gen Display Technologies
Grant Reference no. : A18A7b0058
This research / project is supported by the Ministry of Education - MOE Tier 3
Grant Reference no. : MOE2016-T3-1-006
This research / project is supported by the A*STAR - AME Young Individual Research Grant
Grant Reference no. : A2084c0177