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Article Dans Une Revue Physical Review B Année : 2019

Giant Rabi splitting at the phonon line within all-semiconductor metallic-insulator-metallic antennas

Résumé

We experimentally demonstrate an ultrastrong coupling regime between a gap plasmon and phonon in metallic-insulator-metallic antennas at far-infrared frequencies. These plasmonic antennas made of a silicondoped semiconductor (InAsSb) are versatile structures able to reveal the polaritonic modes due to the hybridization of a gap plasmon and phonon. The anticrossing behavior featuring the ultrastrong coupling is properly studied by varying the width of the metallic antenna array. The gap-plasmon resonance supported by the antennas is shown to be particularly sensitive to the presence of phonons in the GaSb insulator. The experimental data demonstrate a giant Rabi splitting of 30% of the GaSb transverse optical phonon energy and are in good agreement with both electromagnetic and semiclassical calculations.
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Dates et versions

hal-04047695 , version 1 (27-03-2023)

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Rafik Smaali, Fatima Omeis, Emmanuel Centeno, Thierry Taliercio, F Gonzalez-Posada, et al.. Giant Rabi splitting at the phonon line within all-semiconductor metallic-insulator-metallic antennas. Physical Review B, 2019, 100 (4), pp.041302. ⟨10.1103/physrevb.100.041302⟩. ⟨hal-04047695⟩
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