2015-06-16
| Professor Chii-Dong Lin |
| Kansas State University |
| Time: 9:30 am, June 16, 2015 |
| Place: Laser Plasmas Lab meeting room |
|
When atoms or molecules are exposed to an intense infrared laser pulse, an electron which was released earlier may be driven back by the laser field to recollide with the parent ion. These recollisions incur well-known phenomena such as the emission of broadband high-energy photons, or diffraction images by high-energy electrons. The former has now been employed as table-top light sources from the extreme ultraviolet (XUV) to soft X-rays, while the latter has been used as laser-induced electron diffraction. With few-cycle driving laser pulses, attosecond XUV pulses have also been generated. These tabletop light sources open up opportunities for probing and controlling molecular dynamics at attosecond to few-femtosecond timescales. Ultrafast intense laser technologies are evolving rapidly and many possibilities are being explored. Whether it may compete with the ongoing expensive 4th generation free-electron light sources remains to be seen. |
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