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- W3154012728 abstract "Abstract Hot electrons generated in metallic nanostructures have shown promising perspectives for photodetection. This has prompted efforts to enhance the absorption of photons by metals. However, most strategies require fine-tuning of the geometric parameters to achieve perfect absorption, accompanied by the demanding fabrications. Here, we theoretically propose a Ag grating/TiO 2 cladding hybrid structure for hot electron photodetection (HEPD) by combining quasi-bound states in the continuum (BIC) and plasmonic hot electrons. Enabled by quasi-BIC, perfect absorption can be readily achieved and it is robust against the change of several structural parameters due to the topological nature of BIC. Also, we show that the guided mode can be folded into the light cone by introducing a disturbance to become a guided resonance, which then gives rise to a narrow-band HEPD that is difficult to be achieved in the high loss gold plasmonics. Combining the quasi-BIC and the guided resonance, we also realize a multiband HEPD with near-perfect absorption. Our work suggests new routes to enhance the light-harvesting in plasmonic nanosystems." @default.
- W3154012728 created "2021-04-26" @default.
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- W3154012728 date "2021-04-08" @default.
- W3154012728 modified "2023-09-26" @default.
- W3154012728 title "Plasmonic hot-electron photodetection with quasi-bound states in the continuum and guided resonances" @default.
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- W3154012728 doi "https://doi.org/10.1515/nanoph-2021-0069" @default.
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