The present study aims to demonstrate how active hybrid nano-plasmonic modes become excited due to the coupling of localized plasmonic resonance and Fabry-Perot (FP) optical modes. The proposed structure includes an integration of a micro-cavity filled with liquid crystals with high anisotropy and a layer of gold nanoislands (NIs). The optical absorption of NI is controllably discretized to the narrow-width modes, called “hybrid modes (HM),” due to the interplay between FP and plasmonic modes. HM could demonstrate a strongly intensified and diminished absorption, compared to the absorption of the bare gold layer. Based on the active plasmonic experiments, the HM boosted the figure of merit related to activation capability up to 40 times and subsequently experienced impressive spectral shifts, leading to very wavelength-selective changes. The theoretical simulation of the HM is provided to suggest relevant insights into the experimental results.
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