Ultrahigh Q surface lattice resonance supported by a U-shaped resonant ring nanoarray.
Opt Lett
; 49(14): 4006-4009, 2024 Jul 15.
Article
in En
| MEDLINE
| ID: mdl-39008763
ABSTRACT
We achieved an ultrahigh Q surface lattice resonance (SLR) using a conventional U-shaped split ring resonator (U-SRR) array. Numerical results confirmed by semi-analytical analysis show that with the transmission resonance amplitude up to 0.8, the Q-factor of the SLR can still surpass 104. The physical mechanisms of the ultrahigh Q-factor were also investigated. Besides the radiation suppression provided by conventional SLR, the unique geometry of the U-SRR can further offer dual radiation suppression mechanisms reduction of the dipole moment and excitation of the in-plane quadrupole. We expect that the proposed ultrahigh Q SLR platform will be explored for more flexible and advanced nanoscale devices.
Full text:
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Database:
MEDLINE
Language:
En
Journal:
Opt Lett
Year:
2024
Type:
Article