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Plasmonic parametric absorbers
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DOI：10.1364/OL.43.006013.png)
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Exploiting the dynamics of plasmonic parametric resonance (PPR), we introduce the theory of plasmonic parametric absorbers (PPAs). The key insight informing the PPA idea is that in the PPR process a pump field experiences an extinction rate that strongly depends on the intensity of the pump itself, creating two distinct regimes: one of weak absorption under low intensity illumination, and one of strong absorption when the threshold of parametric resonance is met or exceeded. Due to this reverse saturable absorption behavior, PPAs are promising candidates for optical-limiting applications. (C) 2018 Optical Society of America