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Tailoring Dispersion of Room-Temperature Exciton-Polaritons with Perovskite-Based Subwavelength Metasurfaces
journal contribution
posted on 2020-02-24, 13:49 authored by Nguyen
Ha My Dang, Dario Gerace, Emmanuel Drouard, Gaëlle Trippé-Allard, Ferdinand Lédée, Radoslaw Mazurczyk, Emmanuelle Deleporte, Christian Seassal, Hai Son NguyenExciton-polaritons
represent a promising platform for studying
quantum fluids of light and realizing prospective all-optical devices.
Here we report on the experimental demonstration of exciton-polaritons
at room temperature in resonant metasurfaces made from a sub-wavelength
two-dimensional lattice of perovskite pillars. The strong coupling
regime is revealed by both angular-resolved reflectivity and photoluminescence
measurements, showing anticrossing between photonic modes and the
exciton resonance with a Rabi splitting in the 200 meV range.
Moreover, by tailoring the photonic Bloch mode to which perovskite
excitons are coupled, polaritonic dispersions are engineered exhibiting
linear, parabolic, and multivalley dispersions. All of our results
are perfectly reproduced by both numerical simulations based on a
rigorous coupled wave analysis and an elementary model based on a
quantum theory of radiation–matter interaction. Our results
suggest a new approach to study exciton-polaritons and pave the way
toward large-scale and low-cost integrated polaritonic devices operating
at room temperature.
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Perovskite-Based Subwavelength Metasurfaces Exciton-polaritonsradiationTailoringpolaritonicsplittingDispersiondevicemeasurementquantumanalysisdemonstrationperovskiteangular-resolvedlatticeexcitonanticrossingreflectivityphotonic Bloch modeplatformdispersionregimeapproachall-opticalmetasurfaceRabifluidmultivalleyExciton-Polaritonparabolic200 meV rangephotoluminescenceexciton-polaritonpillarsub-wavelengthsimulationRoom-Temperatureroom temperatureinteractionresonancemodel
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