Add to BibSonomy
Abstract
The intrinsic link between surface plasmon modes (eigenmodes) and lattice modes in subwavelength periodic structures is investigated based on the split-ring metamaterial structure. The paper shows that the strong coupling between the eigenmodes and the lattice modes can be achieved by appropriately adjusting the period of the metamaterial structure, and the emergence of new, to the best of our knowledge, modes at low frequencies is observed, resulting in a lower spectral loss of a single hybrid resonance and an increase in its $Q$ factor up to 110. In addition, an asymmetric double-split-ring structure is proposed, and the Fano resonance is excited, giving rise to a spectral line with three resonance valleys. The coupled harmonic-oscillator model is used to interpret the underlying coupling mechanism in lattice-induced transparent systems, which agrees well with our simulation results. This strong-coupling scheme between the lattice and the mixed modes of the metamaterial unit provides a new avenue to modulate lattice-induced transparency, high-$Q$ resonance, and strong-field confinement, which may find applications in the design of ultrasensitive sensors, slow-light devices, as well as multiple frequency absorbers and other fields.
© 2022 Optica Publishing Group
Full Article | PDF ArticleMore Like This
Baoku Wang, Tong Guo, Ke Gai, Fei Yan, Ruoxing Wang, and Li Li
Appl. Opt. 61(11) 3218-3222 (2022)
Shan Yin, Dehui Zeng, Mingkun Zhang, Xintong Shi, Yuanhao Lang, Wei Huang, Wentao Zhang, and Jiaguang Han
Opt. Express 30(11) 19176-19184 (2022)
Andreas Bitzer, Jan Wallauer, Hanspeter Helm, Hannes Merbold, Thomas Feurer, and Markus Walther
Opt. Express 17(24) 22108-22113 (2009)