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Interplay of hot electrons from localized and propagating plasmons. | LitMetric

AI Article Synopsis

  • Plasmon-induced hot-electron generation is gaining attention for its potential in optoelectronics, photovoltaics, and green chemistry, involving hot electrons from metal nanoparticles and nanostructures.
  • Researchers have developed a dual-plasmon device that generates hot electrons from both localized and propagating sources to achieve controllable photoconductivity based on wavelength.
  • The device's photocurrent polarity can be adjusted across the visible spectrum, opening avenues for applications in biosensing, long-distance communication, and photoconversion.

Article Abstract

Plasmon-induced hot-electron generation has recently received considerable interest and has been studied to develop novel applications in optoelectronics, photovoltaics and green chemistry. Such hot electrons are typically generated from either localized plasmons in metal nanoparticles or propagating plasmons in patterned metal nanostructures. Here we simultaneously generate these heterogeneous plasmon-induced hot electrons and exploit their cooperative interplay in a single metal-semiconductor device to demonstrate, as an example, wavelength-controlled polarity-switchable photoconductivity. Specifically, the dual-plasmon device produces a net photocurrent whose polarity is determined by the balance in population and directionality between the hot electrons from localized and propagating plasmons. The current responsivity and polarity-switching wavelength of the device can be varied over the entire visible spectrum by tailoring the hot-electron interplay in various ways. This phenomenon may provide flexibility to manipulate the electrical output from light-matter interaction and offer opportunities for biosensors, long-distance communications, and photoconversion applications.Plasmon-induced hot electrons have potential applications spanning photodetection and photocatalysis. Here, Hoang et al. study the interplay between hot electrons generated by localized and propagating plasmons, and demonstrate wavelength-controlled polarity-switchable photoconductivity.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5626744PMC
http://dx.doi.org/10.1038/s41467-017-00815-xDOI Listing

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