Extreme nonlinear strong-field photoemission from carbon nanotubes

Chi Li, Ke Chen, Mengxue Guan, Xiaowei Wang, Xu Zhou, Feng Zhai, Jiayu Dai, Zhenjun Li, Zhipei Sun, Sheng Meng (), Kaihui Liu () and Qing Dai ()
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Chi Li: CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology
Ke Chen: CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology
Mengxue Guan: Chinese Academy of Science
Xiaowei Wang: National University of Defense Technology
Xu Zhou: Collaborative Innovation Center of Quantum Matter, Peking University
Feng Zhai: Zhejiang Normal University
Jiayu Dai: National University of Defense Technology
Zhenjun Li: CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology
Zhipei Sun: Aalto University
Sheng Meng: Chinese Academy of Science
Kaihui Liu: Collaborative Innovation Center of Quantum Matter, Peking University
Qing Dai: CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology

Nature Communications, 2019, vol. 10, issue 1, 1-9

Abstract: Abstract Strong-field photoemission produces attosecond (10−18 s) electron pulses that are synchronized to the waveform of the incident light. This nonlinear photoemission lies at the heart of current attosecond technologies. Here we report a new nonlinear photoemission behaviour—the nonlinearity in strong-field regime sharply increases (approaching 40th power-law scaling), making use of sub-nanometric carbon nanotubes and 800 nm pulses. As a result, the carrier-envelope phase sensitive photoemission current shows a greatly improved modulation depth of up to 100% (with a total modulation current up to 2 nA). The calculations reveal that the behaviour is an interplay of valence band optical-field emission with charge interaction, and the nonlinear dynamics can be tunable by changing the bandgap of carbon nanotubes. The extreme nonlinear photoemission offers a new means of producing extreme temporal-spatial resolved electron pulses, and provides a new design philosophy for attosecond electronics and photonics.

Date: 2019
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DOI: 10.1038/s41467-019-12797-z

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