Illustration of self-synchronized dual-color free-electron-laser generation driven by a single prebunched electron beam. Blue: soft x-ray pulses; magenta: long-wavelength mid-infrared radiation.
From the article:
Self-Synchronized Soft X-Ray and Infrared Free-Electron Lasers from a Single Prebunched Electron BeamYin Kang et al.
Phys. Rev. Lett. 137, 185001 (2026)
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