Interactions of Fundamental Mie Modes with Thin Epsilon-near-Zero Substrates.
Nano Lett
; 23(24): 11555-11561, 2023 Dec 27.
Article
em En
| MEDLINE
| ID: mdl-38038228
ABSTRACT
Extensive research has focused on Mie modes in dielectric nanoresonators, enabling the creation of thin optical devices surpassing their bulk counterparts. This study investigates the interactions between two fundamental Mie modes, electric and magnetic dipoles, and the epsilon-near-zero (ENZ) mode. Analytical, simulation, and experimental analyses reveal that the presence of the ENZ substrate significantly modifies these modes despite a large size mismatch. Electric and magnetic dipole modes, both with â¼12 THz line widths, exhibit 21 and 26 THz anticrossings, respectively, when coupled to the ENZ mode, indicating strong coupling. We also demonstrate that this strongly coupled system yields notably large subpicosecond nonlinear responses. Our results establish a solid foundation for designing functional, nonlinear, dynamic dielectric metasurfaces with ENZ materials.
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MEDLINE
Idioma:
En
Revista:
Nano Lett
Ano de publicação:
2023
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Article