High-density Au nanorod optical field-emitter arrays

R. G. Hobbs, Y. Yang, P. D. Keathley, M. E. Swanwick, L. F. Velásquez-Garcíia, F. X. Kärtner, W. S. Graves, K. K. Berggren

Research output: Contribution to journalArticle

13 Scopus citations

Abstract

We demonstrate the design, fabrication, characterization, and operation of high-density arrays of Au nanorod electron emitters, fabricated by high-resolution electron beam lithography, and excited by ultrafast femtosecond near-infrared radiation. Electron emission characteristic of multiphoton absorption has been observed at low laser fluence, as indicated by the power-law scaling of emission current with applied optical power. The onset of space-charge-limited current and strong optical field emission has been investigated so as to determine the mechanism of electron emission at high incident laser fluence. Laser-induced structural damage has been observed at applied optical fields above 5 GV m-1, and energy spectra of emitted electrons have been measured using an electron time-of-flight spectrometer.

Original languageEnglish (US)
Article number465304
JournalNanotechnology
Volume25
Issue number46
DOIs
StatePublished - Nov 21 2014
Externally publishedYes

Keywords

  • electron beam lithography
  • field-emitter array
  • nanofabrication
  • photocathode
  • ultrafast

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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  • Cite this

    Hobbs, R. G., Yang, Y., Keathley, P. D., Swanwick, M. E., Velásquez-Garcíia, L. F., Kärtner, F. X., Graves, W. S., & Berggren, K. K. (2014). High-density Au nanorod optical field-emitter arrays. Nanotechnology, 25(46), [465304]. https://doi.org/10.1088/0957-4484/25/46/465304