Emission efficiency dependence on the tilted angle of nanogaps in surface conduction electron-emitter

Yiming Li*, Yi Ting Kuo, Hui Wen Cheng, Ta Ching Yeh, Hsiang Yu Lo, Mei Tsao Chiang, Chi Neng Mo

*Corresponding author for this work

Research output: Contribution to conferencePaperpeer-review

Abstract

In this work, the emission efficiency of the novel surface conduction electron-emitter corresponding to tilted angles (θ) of the driving electrode is studied numerically. Due to the small angle, the emitter apex becomes significant and induces large electric field. The large electric field then attracts more particles into vacuum and then increases the emission current. However, the structure of the driving electrode limits the electron trajectory while the angle decreases, and it reflects the portion of collected current by the anode decreases and makes a drop in emission efficiency. It shows there is the highest emission efficiency (about 37%) under an optimum angle θ = 60°. The result provides an insight into the relation between emission efficiency and emitter apex.

Original languageEnglish
Pages205-208
Number of pages4
DOIs
StatePublished - 2008
Event2008 International Conference on Simulation of Semiconductor Processes and Devices, SISPAD 2008 - Hakone, Japan
Duration: 9 Sep 200811 Sep 2008

Conference

Conference2008 International Conference on Simulation of Semiconductor Processes and Devices, SISPAD 2008
CountryJapan
CityHakone
Period9/09/0811/09/08

Keywords

  • Collected current by anode
  • Emission efficiency
  • Emitted current
  • FDTD
  • Fowler-Nordheim equation
  • Maxwell equation
  • Nanogap
  • Particle-in-cell
  • Surface conduction electron-emitter

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