Affiliation:
1. Guizhou University
2. Guizhou Education University
3. Guizhou Minzu University
Abstract
Effective manipulation of the interactions between light and matter is crucial for the advancement of various high-performance optoelectronic devices. It is noted that the toroidal dipole resonance refers to an electromagnetic excitation that exists beyond the conventional understanding of electric and magnetic multipoles, which shows great potential for enhancing light-matter interactions. In this work, we investigate the strong coupling properties of electric toroidal dipole (ETD) and magnetic toroidal dipole (MTD) with excitons in (PEA)2PbI4 perovskite metasurfaces. The nanostructure consists of two identical nanobars on a SiO2 substrate, which support ETD and MTD responses. The strong coupling between ETD/MTD modes and perovskite excitons is achieved when adjusting oscillator strength f0, which can be charactered by the clearly anti-crossing behavior appeared in the transmission spectra. The Rabi splitting can be readily tuned by controlling f0. When f0 increases to 1.0, their Rabi splitting values reach as high as 371 meV and 300 meV, respectively. The proposed strong coupling between excitons and ETD/MTDs paves the way for large-scale, low-cost integrated polaritonic devices operating at room temperature.
Funder
National Natural Science Foundation of China
Guizhou Provincial Science and Technology Department
Science and Technology Innovation Team Project of Guizhou Colleges and Universities
Science and Technology Talent Support Project of the Department of Education in the Guizhou Province
The Growth Foundation for Young Scientists of Education Department of Guizhou Province
Industry and Education Combination Innovation Platform of Intelligent Manufacturing and Graduate Joint Training Base at Guizhou University
Research Fund for the Doctoral Program of Guizhou Education University
Subject
Atomic and Molecular Physics, and Optics
Cited by
6 articles.
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