Superradiant Thomson Scattering via Oscillating Quasiparticles

@misc{ma2026superradiant,
  title = {{Superradiant Thomson Scattering via Oscillating Quasiparticles}},
  author = {Qianyi Ma and Yuhui Xia and Zhenan Wang and Letian Liu and Zhiyan Yang and Xinlu Xu and Xueqing Yan},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.14472},
  eprint = {2609.14472},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.14472},
}

TY  - UNPB
TI  - Superradiant Thomson Scattering via Oscillating Quasiparticles
AU  - Qianyi Ma
AU  - Yuhui Xia
AU  - Zhenan Wang
AU  - Letian Liu
AU  - Zhiyan Yang
AU  - Xinlu Xu
AU  - Xueqing Yan
PY  - 2026
DA  - 2026/09/13
PB  - arXiv
DO  - 10.48550/arxiv.2609.14472
UR  - https://arxiv.org/abs/2609.14472
AB  - The recently proposed concept of generalized superradiance (GS) allows for the generation of coherent radiation without the need for complex compression or prebunching of relativistic electrons. However, the quasiparticles in current GS schemes are formed through local electron accumulation and their sizes exceed 100 nm, restricting the achievable radiation wavelength. In this study, we demonstrate a realization of narrow quasiparticles with <10 nm widths through sheet-crossing. When an energy chirped electron beam collides with an intense laser pulse, lower energy electrons at the front slip back, forming an accelerating quasiparticle. These quasiparticles undergo transverse oscillations within the laser field, thereby extending GS emission from the Cherenkov regime into the synchrotron regime. Three-dimensional particle-in-cell simulations indicate the production of gigawatt-class chirped radiation in the 10-100 nm range. The proposed scheme is compatible with existing Thomson scattering facilities, paving the way for the generation of coherent ultrafast radiation.
ER  -