Theoretical study of photoluminescence spectroscopy of strong exciton-polariton coupling in dielectric nanodisks with anapole states. (June 2020)

• Record Type: Journal Article
• Authors: Gerislioglu, B.; Ahmadivand, A.
• Is Part Of: Materials today chemistry. Volume 16(2020)
• Publication Date: 2020-06
• Subjects: Anapole resonance -- Excitonic materials -- Photonics -- Light-matter coupling -- Luminescence analysis; Chemistry -- Periodicals; Materials -- Research -- Periodicals; Materials science -- Periodicals; Chemistry; Materials -- Research; Electronic journals; Periodicals; 660.282
• DOI: 10.1016/j.mtchem.2020.100254
• Languages: English
• ISSNs: 2468-5194

Abstract

Abstract: Semiconductor nanoparticles and nanostructures in the strong coupling regime exhibit an intriguing energy scale in the optical frequencies, which is specified by the Rabi splitting between the upper and lower exciton-polariton states. Technically, exciton-polaritons are part-light, part-matter quasiparticles that arise from the strong interaction of excitonic substances and photonic platforms. In this work, using full-wave numerical and theoretical studies, we showed the emergence of strong light-matter coupling between the nonradiating anapole states from an individual semiconductor nanodisk coupled to a J-aggregate fluorescent dye molecule resonating in the visible spectrum. By demonstrating the physical mechanism behind the observed energy splitting for various Lorentzian linewidth of excitonic material, we theoretically confirmed the obtained spectral responses by conducting photoluminescence spectroscopy analysis. The coupling of anapole resonances in semiconductor nanoparticles with excitonic levels can propose interesting possibilities for the control of directional light scattering in the strong coupling limit, and the dynamic tuning of deep-subwavelength light-matter coupled states by external stimuli. Highlights: The emergence of strong light-matter coupling between the nonradiating anapole and excitons is demonstrated. The theory behind the Rabi splitting for various Lorentzian linewidth of excitonic material is investigated. photonic density of states and photoluminescence studies are conducted based on theoretical methods.