Although the Q -factor of quadrupolar resonance is lower than what has been reported recently for other BIC modes [ 39 ], [ 41 ], [ 45 ], the enhancement is quite significant for a BIC in a relatively lossy plasmonic structure.
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Although the Q -factor of quadrupolar resonance is lower than what has been reported recently for other BIC modes [ 39 ], [ 41 ], [ 45 ], the enhancement is quite significant for a BIC in a relatively lossy plasmonic structure.