2019年7月
Enhancing laser beam performance by interfering intense laser beamlets
NATURE COMMUNICATIONS
- 巻
- 10
- 号
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1038/s41467-019-10997-1
- 出版者・発行元
- NATURE PUBLISHING GROUP
Increasing the laser energy absorption into energetic particle beams represents a long-standing quest in intense laser-plasma physics. During the interaction with matter, part of the laser energy is converted into relativistic electron beams, which are the origin of secondary sources of energetic ions, gamma-rays and neutrons. Here we experimentally demonstrate that using multiple coherent laser beamlets spatially and temporally overlapped, thus producing an interference pattern in the laser focus, significantly improves the laser energy conversion efficiency into hot electrons, compared to one beam with the same energy and nominal intensity as the four beamlets combined. Two-dimensional particle-in-cell simulations support the experimental results, suggesting that beamlet interference pattern induces a periodical shaping of the critical density, ultimately playing a key-role in enhancing the laser-toelectron energy conversion efficiency. This method is rather insensitive to laser pulse contrast and duration, making this approach robust and suitable to many existing facilities.
- リンク情報
- ID情報
-
- DOI : 10.1038/s41467-019-10997-1
- ISSN : 2041-1723
- Web of Science ID : WOS:000474241100004