Autler-Townes splitting and acoustically induced transparency based on Love waves interacting with a pillared metasurface

Yuxin Liu (1, 2) , Abdelkrim Talbi (1, 2) , El Houssaine El Boudouti (3) , Olivier Bou Matar (1, 2) , Philippe Pernod (1, 4, 2) , Bahram Djafari-Rouhani (1, 5)

1 IEMN - Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520
2 AIMAN-FILMS - IEMN - Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN
3 LPMR, Department de Physique, Faculty of science, University Mohammed I
4 LIA LICS/LEMAC - Laboratoire International associé sur les phénomènes Critiques et Supercritiques en électronique fonctionnelle, acoustique et fluidique
5 PHYSIQUE - IEMN - Physique - IEMN

Autler-Townes splitting (ATS) and electromagnetically induced transparency (EIT) are similar phenomena but distinct in nature. They have been widely discussed and distinguished by employing the Akaike information criterion (AIC). However, such work is lacking in acoustic systems. In this work, the interaction of Love waves with a two-line pillared metasurface is numerically investigated by the finite-element method. An acoustic analog of ATS, Fabry-Perot resonance, and cavity modes are first demonstrated in two lines of identical pillars by varying the distance between the pillar lines. By detuning the radius of one line of pillars, Fabry-Perot resonance along with two different pillar resonances give rise to the acoustic analog of EIT (AIT) when the distance between the pillar lines is a multiple of half wavelength. ATS and AIT formula models are used to fit the transmission spectra, showing good agreements with numerical results. The quality of the fit models is quantitatively evaluated by resorting to the AIC. We show that theoretical and analytical discrimination between ATS and AIT are methodologically complementary. These results should have consequences for potential acoustic applications such as wave control, and the design of metamaterials and biosensors.

Domaines: Sciences de l'ingénieur [physics]

Yuxin Liu, Abdelkrim Talbi, El Houssaine El Boudouti, Olivier Bou Matar, Philippe Pernod, et al.. Autler-Townes splitting and acoustically induced transparency based on Love waves interacting with a pillared metasurface. Physical Review Applied, 2019, 11 (6), pp.064066. ⟨10.1103/PhysRevApplied.11.064066⟩. ⟨hal-03140500⟩