Maximizing Smith-Purcell radiation intensity via multi-parameter optimization

Abstract

Smith Purcell radiation offers a versatile platform for terahertz light matter interactions and compact source development, with intensity enhancement as a key priority. Using particle in cell simulations across a duty cycle range of from 0.1 to 0.9 at 0.4, 0.5, and 0.6 THz, we optimize the grating period, electron kinetic energy and duty cycle. The intensity exhibits a unimodal dependence on the grating period at all three frequencies, with peak enhancements of 96, 34, and 17.5 fold relative to our reference baseline . The optimal duty cycle shifts from 0.2 to 0.4 with increasing frequency, a trend arising from the trade off between coherent superposition and beam-wave coupling under fixed length conditions. These results provide systematic design guidelines for compact tabletop terahertz sources.

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BibTeX RIS

BibTeX

@misc{yang2026maximizing,
  title = {{Maximizing Smith-Purcell radiation intensity via multi-parameter optimization}},
  author = {Xiaojie Yang and Shichao Zhao and Xinyu Liu and Suguo Chen and Yue Wang and Ping Zhang and Zhigang Lu and Zhanliang Wang and Sunchao Huang and Yubin Gong},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.22866},
  eprint = {2610.22866},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.22866},
  note = {CC BY-NC-SA 4.0},
}

RIS

TY  - UNPB
TI  - Maximizing Smith-Purcell radiation intensity via multi-parameter optimization
AU  - Xiaojie Yang
AU  - Shichao Zhao
AU  - Xinyu Liu
AU  - Suguo Chen
AU  - Yue Wang
AU  - Ping Zhang
AU  - Zhigang Lu
AU  - Zhanliang Wang
AU  - Sunchao Huang
AU  - Yubin Gong
PY  - 2026
DA  - 2026/10/16
PB  - arXiv
DO  - 10.48550/arxiv.2610.22866
UR  - https://arxiv.org/abs/2610.22866
AB  - Smith Purcell radiation offers a versatile platform for terahertz light matter interactions and compact source development, with intensity enhancement as a key priority. Using particle in cell simulations across a duty cycle range of from 0.1 to 0.9 at 0.4, 0.5, and 0.6 THz, we optimize the grating period, electron kinetic energy and duty cycle. The intensity exhibits a unimodal dependence on the grating period at all three frequencies, with peak enhancements of 96, 34, and 17.5 fold relative to our reference baseline . The optimal duty cycle shifts from 0.2 to 0.4 with increasing frequency, a trend arising from the trade off between coherent superposition and beam-wave coupling under fixed length conditions. These results provide systematic design guidelines for compact tabletop terahertz sources.
ER  -

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