Image excitons and plasmon-exciton strong coupling in two-dimensional perovskite semiconductors
Ibbotson, Lindsey A
Prakash, G Vijaya
Physical Review B
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Niu, W., Ibbotson, L. A., Leipold, D., Runge, E., Prakash, G. V., & Baumberg, J. (2015). Image excitons and plasmon-exciton strong coupling in two-dimensional perovskite semiconductors. Physical Review B, 91 (161303)https://doi.org/10.1103/PhysRevB.91.161303
We present evidence for “image biexcitons” within organic-inorganic perovskite-coated silver gratings. These composite quasiparticles are formed by the interaction between an exciton and its image in the metal mirror below, with binding energy 100 meV at room temperature. By changing the polar and azimuthal angles of the incident light, we observe strong coupling between excitons and surface plasmon polaritons on the grating, with Rabi splittings of 150 and 125 meV for the exciton and biexciton, respectively. A detailed analysis of the field polarizations and dipole orientations shows how these Rabi couplings arise from the strongly compressed field volume.
This work is part of the U.K.-India Education Research Initiative (UKIERI) and supported by EPSRC Grants No. EP/G060649/1, No. EP/I012060/1, No. EP/L027151/1, and No. EP/K028510/1, and ERC LINASS 320503.
European Research Council (320503)
External DOI: https://doi.org/10.1103/PhysRevB.91.161303
This record's URL: https://www.repository.cam.ac.uk/handle/1810/247945
Attribution-NonCommercial 2.0 UK: England & Wales
Licence URL: http://creativecommons.org/licenses/by-nc/2.0/uk/
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