Ultrafast field-driven monochromatic photoemission from carbon nanotubes

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Details

Original languageEnglish
Title of host publication2017 30th International Vacuum Nanoelectronics Conference, IVNC 2017
Publication statusPublished - 26 Sep 2017
MoE publication typeA4 Article in a conference publication
EventInternational Vacuum Nanoelectronics Conference - Regensburg, Germany
Duration: 10 Jul 201714 Jul 2017
Conference number: 30

Conference

ConferenceInternational Vacuum Nanoelectronics Conference
Abbreviated titleIVNC
CountryGermany
CityRegensburg
Period10/07/201714/07/2017

Researchers

  • Chi Li
  • Zhenjun Li
  • Ke Chen
  • Matthew T. Cole
  • Qing Dai
  • Xu Zhou
  • Fengrui Yao
  • Ruixi Qiao
  • Dapeng Yu
  • Kaihui Liu
  • Feng Zhai
  • Zhipei Sun

Research units

  • Peking University
  • Zhejiang Normal University
  • National Center for Nanoscience and Technology Beijing

Abstract

Ultrafast electron pulses, combined with laser-pump and electron-probe technologies, allow for various forms of ultrafast microscopy and spectroscopy to elucidate otherwise challenging to observe physical and chemical transitions. However, the pursuit of simultaneous ultimate spatial and temporal resolution has been largely subdued by the low monochromaticity of the electron pulses and their poor phase synchronization to the optical excitation pulses. State-of-the-art photon-driven sources have good monochromaticity but poor phase synchronization. In contrast, field-driven photoemission has much higher light phase synchronization, due to the intrinsic sub-cycle emission dynamics, but poor monochromaticity. Such sources suffer from larger electron energy spreads (3-100 eV) attributed to the relatively low field enhancement of the conventional metal tips which necessitates long pump wavelengths (> 800 nm) in order to gain sufficient ponderomotive potential to access the field-driven regime4. In this work, field-driven photoemission from ∼1 nm radius carbon nanotubes excited by a femtosecond laser at a short wavelength of 410 nm has been realized. The energy spread of field-driven electrons is effectively compressed to 0.25 eV outperforming all conventional ultrafast electron sources. Our new nanotube-based ultrafast electron source opens exciting prospects for attosecond imaging and emerging light-wave electronics.

    Research areas

  • carbon nanotube, low energy spread, strong field, ultrafast photoemission

ID: 16176442