Image excitons and plasmon-exciton strong coupling in two-dimensional perovskite semiconductors
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Authors
Abstract
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.
Description
Keywords
5108 Quantum Physics, 3403 Macromolecular and Materials Chemistry, 34 Chemical Sciences, 3406 Physical Chemistry, 51 Physical Sciences
Journal Title
Physical Review B - Condensed Matter and Materials Physics
Conference Name
Journal ISSN
1098-0121
1550-235X
1550-235X
Volume Title
91
Publisher
American Physical Society (APS)
Publisher DOI
Sponsorship
Engineering and Physical Sciences Research Council (EP/G060649/1)
Engineering and Physical Sciences Research Council (EP/L027151/1)
European Research Council (320503)
Engineering and Physical Sciences Research Council (EP/K028510/1)
Engineering and Physical Sciences Research Council (EP/L027151/1)
European Research Council (320503)
Engineering and Physical Sciences Research Council (EP/K028510/1)
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.