Abstract
Surface plasmon resonance (SPR) sensors take advantages of label-free, real-time and surface-sensitive detection. The SPR technology is widely used for studying binding kinetics of various biomolecules. However, the typical SPR only has an evanescent depth. In this work, we discover a new phenomenon in aluminum capped nanoslit array which possesses two distant evanescent depths in a single Fano mode. This dual-mode in a single resonance property makes the Fano resonance useful for some innovative biosensing applications, such as self-referencing SPR sensors which applied in measuring the bio-reaction.
© 2022 IEEE
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