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Photodeposition of Pd onto Colloidal Au Nanorods by Surface Plasmon Excitation
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A Plasmon-Mediated Electron Emission Process.

Yan Shen1, Huanjun Chen1, Ningsheng Xu1

  • 1State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, School of Electronics and Information Technology , Sun Yat-sen University , Guangzhou 510275 , People's Republic of China.

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|February 13, 2019
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Summary
This summary is machine-generated.

Researchers developed a plasmon-mediated electron emission (PMEE) process using gold-on-graphene nanostructures. This method achieves efficient electron emission with moderate light intensity, overcoming limitations of traditional optoelectronic devices.

Keywords:
Au-on-Gr nanostructureelectromagnetic fieldhot electronsplasmon-mediated electron emission (PMEE)vacuum electron emission

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Area of Science:

  • Optoelectronics
  • Materials Science
  • Nanotechnology

Background:

  • Light-driven electron emission is crucial for optoelectronics but typically requires high light intensity or frequency.
  • Existing methods face challenges in implementation and integration due to these demanding conditions.

Purpose of the Study:

  • To propose and demonstrate a novel method for efficient electron emission using moderate light.
  • To overcome the limitations of high intensity/frequency requirements in conventional electron emission processes.

Main Methods:

  • Combining plasmonic nanostructures with low work function nanoelectron emitters.
  • Utilizing hot electrons generated by plasmon resonances for direct injection and vacuum emission.
  • Demonstrating the plasmon-mediated electron emission (PMEE) process with a gold-on-graphene (Au-on-Gr) nanostructure.

Main Results:

  • Achieved high-efficiency electron emission using moderate light intensities and visible wavelengths.
  • Demonstrated electron emission with light intensity as low as 73 mW·cm⁻² using the Au-on-Gr nanostructure.
  • Confirmed that the process is plasmon-mediated electron emission (PMEE), distinct from field electron emission.

Conclusions:

  • The proposed plasmon-mediated electron emission (PMEE) offers an efficient alternative for electron emission.
  • This technology is suitable for applications requiring moderate light conditions, such as cold-cathode electron sources and advanced photocathodes.
  • The gold-on-graphene (Au-on-Gr) nanostructure serves as a viable platform for PMEE, paving the way for advanced micro- and nanoelectronic devices.