Interactions of Fundamental Mie Modes with Thin Epsilon-near-Zero Substrates

• DOI: 10.1021/acs.nanolett.3c03301
• Publication Date: 2023-12-01T11:57:23Z
• Authors: Mohammad Karimi; Kashif Masud Awan; Yaswant Vaddi; Rasoul Alaee; Jeremy Upham; M. Zahirul Alam; Robert W. Boyd

Extensive research has focused on Mie modes in dielectric nanoresonators, enabling the creation of thin optical devices surpassing their bulk counterparts. This study investigates interactions between two fundamental modes, electric and magnetic dipoles, epsilon-near-zero (ENZ) mode. Analytical, simulation, experimental analyses reveal that presence ENZ substrate significantly modifies these despite a large size mismatch. Electric dipole both with ∼12 THz line widths, exhibit 21 26 anticrossings, respectively, when coupled to mode, indicating strong coupling. We also demonstrate this strongly system yields notably subpicosecond nonlinear responses. Our results establish solid foundation for designing functional, nonlinear, dynamic metasurfaces materials.