A Low-Voltage, Pre-Modulation Terahertz Oscillator Based on a Carbon Nanotube Cold-Cathode

Xiaotao Xu, Xuesong Yuan, Qingyun Chen, Matthew Cole, Yu Zhang, Jie Xie, Yong Yin, Hailong Li, Yang Yan

Research output: Contribution to journalArticle

6 Downloads (Pure)


To develop miniaturized and compact vacuum electron devices, new approaches to device manufacturing must be embraced. Here, a terahertz oscillator based on carbon nanotube (CNT) cold cathode is investigated through particle-in-cell (PIC) simulations. The studies show that the high-frequency (HF) field excited by the device can modulate the field emission current efficiently, with an output power of 4.6 W at 139.4 GHz obtained at an operating voltage of 2.9 kV and an initial emission current and current density of 15.8 mA and 7.65 A/cm 2 , respectively, and the efficiency is 10.0%.
Original languageEnglish
Pages (from-to)1266 - 1269
Number of pages4
JournalIEEE Transactions on Electron Devices
Issue number3
Early online date14 Feb 2020
Publication statusPublished - 31 Mar 2020


  • nanotechnology
  • Electronics engineering
  • electron emission
  • field electron emission
  • Carbon nanotube (CNT)

Cite this