Directional emission from electrically injected exciton-polaritons in perovskite metasurfaces

• Main Authors: Wang, Yutao, Tian, Jingyi, Klein, Maciej, Adamo, Giorgio, Ha, Son Tung, Soci, Cesare
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2023
• Subjects: Physics; Dielectric Metasurfaces; Light-emitting Transistor
• Online Access: https://hdl.handle.net/10356/170323
• Institution: Nanyang Technological University

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.