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Showing 1–3 of 3 results
Advanced filters: Author: Nikhil Pramanik Clear advanced filters

  • The authors demonstrate tunable x-ray generation from free-electron-driven van der Waals bulk crystals. This overturns the notion that parametric x-rays are only possible with very thin films or highly relativistic electrons and show record enhancement of the x-ray output.

    • Qingwei Zhai
    • Nikhil Pramanik
    • Liang Jie Wong
    ResearchOpen Access
    Nature Communications
    Volume: 16, P: 1-10

  • Tabletop, water-window X-rays are generated using free-electron-driven van der Waals materials. The X-ray energy from the source can be tuned across the water window, and the established fundamental scaling laws for the tunable photon flux may enable the design of powerful emitters based on free-electron-driven quantum materials.

    • Nikhil Pramanik
    • Sunchao Huang
    • Liang Jie Wong
    Research
    Nature Photonics
    Volume: 18, P: 1203-1211

  • Quantum recoil is experimentally observed via photon energy shifts in Smith–Purcell radiation. Leveraging van der Waals materials as atomic-scale gratings, the quantum recoil is measured at room temperature on a tabletop platform.

    • Sunchao Huang
    • Ruihuan Duan
    • Liang Jie Wong
    Research
    Nature Photonics
    Volume: 17, P: 224-230