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Few-Cycle Infrared Pulse Evolving in FEL Oscillators and Its Application to High-Harmonic Generation for Attosecond Ultraviolet and X-ray Pulses
| Content Provider | MDPI |
|---|---|
| Author | Hajima, Ryoichi |
| Copyright Year | 2021 |
| Description | Generation of few-cycle optical pulses in free-electron laser (FEL) oscillators has been experimentally demonstrated in FEL facilities based on normal-conducting and superconducting linear accelerators. Analytical and numerical studies have revealed that the few-cycle FEL lasing can be explained in the frame of superradiance, cooperative emission from self-bunched systems. In the present paper, we review historical remarks of superradiance FEL experiments in short-pulse FEL oscillators with emphasis on the few-cycle pulse generation and discuss the application of the few-cycle FEL pulses to the scheme of FEL-HHG, utilization of infrared FEL pulses to drive high-harmonic generation (HHG) from gas and solid targets. The FEL-HHG enables one to explore ultrafast science with attosecond ultraviolet and X-ray pulses with a MHz repetition rate, which is difficult with HHG driven by solid-state lasers. A research program has been launched to develop technologies for the FEL-HHG and to conduct a proof-of-concept experiment of FEL-HHG. |
| Starting Page | 15 |
| e-ISSN | 22182004 |
| DOI | 10.3390/atoms9010015 |
| Journal | Atoms |
| Issue Number | 1 |
| Volume Number | 9 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-02-24 |
| Access Restriction | Open |
| Subject Keyword | Atoms Quantum Science and Technology Free-electron Laser Superradiance Few-cycle Pulse High-harmonic Generation |
| Content Type | Text |
| Resource Type | Article |
