Outline
Laser is the ultimate light source created by mankind, and it has become an indispensable tool for our social life. In this laboratory, our main goal is to create an unexplored ultrafast laser by using the extreme nature of laser such as ultrashort pulse, super broadband, high power, and so on. Specifically, we are developing a high-power a few-cycle laser source, and using it to develop novel laser source with full coherence in the soft x-ray region and a pulse width of attosecond region. We extend the frontier of laser science through the development of novel laser sources.
Fields
Interdisciplinary Science and Engineering, Attosecond laser, Engineering, Physics
Keywords
High-power single-cycle laser, Attosecond laser, Thin-disk laser, fiber laser, Strong-field physics
Subjects
- High-intensity single-cycle laser pulse
- High-power coherent soft x-ray attosecond pulse
- Ultrafast soft x-ray science
- Next-generation quantum beam sources
Amplification of single-cycle laser pulses
Selected Publications
- Rajpoot, R., and Takahashi, E.J.: “Subcycle pulse control of holographic and nonholographic electron interferences” Physical Review Research, 8, 013323 (2026)
- Nishimiya, K., and Takahashi, E.J.: “Advances in dual-chirped optical parametric amplification” Advances in Physics: X, 10, (1) (2025)
- Dong, D., Wang, H., Xue, B., Imasaka, K., Kanda, N., Fu, Y., Nabekawa, Y., and Takahashi, E.J.: “Perturbed three-channel waveform synthesizer for efficient isolated attosecond pulse generation and characterization” Opt. Lett. 50, 1461 (2025)
- Rajpoot, R., and Takahashi, E.J.: “Systematic analysis of an attosecond pulse generation by a subcycle laser field” Physical Review Research, 7, 013047 (2025)
- Nishimiya, K., Wang, F., Lan, P., and Takahashi, E.J.: “Octave-spanning supercontinuum coherent soft x-ray for producing a single-cycle soft x-ray pulse” Opt. Lett. 49, 5779 (2024)
- Lu. X. and Takahashi, E.J.:“Dual-chirped optical parametric amplification of high-energy single-cycle laser pulses”Nature Photonics 18, 99-106 (2024).
- Bing, X., Midorikawa, K., and Takahashi, E.J.:“Gigawatt-class, tabletop, isolated-attosecond-pulse light source”Optica 9, 360-363 (2022).
- Lu, X., Bing, X., Ishii, N., Itatani, J., Midorikawa, and Takahashi, E.J.:“100-mJ class, sub-two-cycle, carrier-envelope phase-stable dual-chirped optical parametric amplification”Opt. Lett. 47, 3371-3374 (2022).
- Bing, X., Tamaru, Y., Fu, Y., Yuan, H., Lan, P., Mucke, O.D., Suda, A., Midorikawa, K., and Takahashi, E.J.:“A Custom-Tailored Multi-TW Optical Electric Field for Gigawatt Soft-X-Ray Isolated Attosecond Pulses.”Ultrafast Science 2021, 1-13 (2021).
- Bing, X., Tamaru, Y., Fu, Y., Yuan, H., Lan, P., Mucke, O.D., Suda, A., Midorikawa, K., and Takahashi, E.J.:“Fully stabilized multi-TW optical waveform synthesizer: Toward gigawatt isolated attosecond pulses”Science Advances, 6: eaay2802. (2020).
Achievements
Members
| Name | Position |
|---|---|
| Eiji J. Takahashi | Team Director |
| Yasuo Nabekawa | Senior Research Scientist |
| Natsuki Kanda | Research Scientist |
| Lin Yu-Chieh | Research Scientist |
| Rambabu Rajpoot | Postdoctoral Researcher |
| Kaito Nishimiya | Special Postdoctoral Researcher |
| Kotaro Imasaka | Special Postdoctoral Researcher |
| Hiroki Kawase | Special Postdoctoral Researcher |
| Mitsunori Toyoda | Visiting Scientist |
| Takeshi Higashiguchi | Visiting Scientist |
| Akiyoshi Hishikawa | Visiting Scientist |
| Mizuho Fushitani | Visiting Scientist |
| Toru Morishita | Visiting Scientist |
| Akira Suda | Visiting Scientist |
| Jiro Itatani | Visiting Scientist |
| Dai Ikeda | Visiting Scientist |
| Dianhong Dong | International Program Associate |
| Minshuang Xia | International Program Associate |
| Yunpeng Liu | International Program Associate |
Opportunities
Related Links
- Laboratory Page on RIKEN Website
- Extreme Photonics Research Team | RIKEN
Access & Contact
2-1 Hirosawa, Wako, Saitama 351-0198 JapanAccess Emali: