Acta Photonica Sinica, Volume. 50, Issue 8, 0850202(2021)
Research Progress of Generation and Control of Ultrafast and Coherent Electron Sources Based on Optical Fields (Invited)
Fig. 5. Generation, compression and characterization of subrelativistic electron pulses by light field[9]
Fig. 6. Concept and experimental setup of electron pulses compression by THz[181]
Fig. 7. Concept of electron-beam control by optical field[184]. An electron beam (blue) is modulated by a single field cycle (red) of a phase-controlled waveform when passing through a metallic membrane (green). The temporally modulated electron current is directly characterized by real-space streaking induced by a second single-cycle field (red). Reprinted figure with permission from Ref. [184] Copyright (2020) by the American Physical Society
Fig. 8. Layout of the experimental setup for the generation and detection of attosecond electron pulse trains[185]. The two spatiotemporally separated optical traveling waves-the first for the attosecond electron pulse train generation and the second for its analysis-are generated using two independent Michelson interferometers. Reprinted figure with permission from Ref. [185] Copyright (2018) by the American Physical Society
Fig. 9. Direct mapping of attosecond electron dynamics with laser[191]. As an intense laser pulse is reflected on the plasma mirror, it expels electrons at several narrow specific phase windows of the field. These subcycle attosecond electron pulses then experience an integrated momentum kick as they surf the laser electric field (laser streaking) and form the periodic fringes in the far field
Fig. 10. Set-up of ultrafast low energy electron diffraction in a backscattering geometry[198]. Ultrashort electron pulses (green) from a nanofabricated electron gun probe the dynamical evolution of the laser-excited surface structure
Fig. 12. Schematic of keV ultrafast electron diffraction facility[204]
Fig. 14. Schematic and photo of laser-free 4D ultrafast electron microscopy based on radio-frequency pulser[236]
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Ye TIAN, Chuliang ZHOU, Xuewen FU, Shaozheng JI, Yuxin LENG, Ruxin LI. Research Progress of Generation and Control of Ultrafast and Coherent Electron Sources Based on Optical Fields (Invited)[J]. Acta Photonica Sinica, 2021, 50(8): 0850202
Category: Special Issue for Ultrafast Optics
Received: May. 30, 2021
Accepted: Jun. 30, 2021
Published Online: Sep. 1, 2021
The Author Email: FU Xuewen (xwfu@nankai.edu.cn)