, University of Colorado at Boulder
[Host: Reihaneh Shahrokhshahi]
Ever since the invention of the laser 50 years ago, scientists have been striving to extend coherent laser-like beams into the x-ray region of the spectrum. Very recently, the prospects for tabletop x-ray beams at wavelengths <10Ã
have brightened considerably. This advance is the direct result of a new ability to manipulate electrons on their natural, attosecond (10^-18s), time-scales using femtosecond lasers. In recent work we uncovered a new regime of nonlinear optics, where bright laser-like X-ray supercontinua with photon energies >1.6keV (wavelengths < 8Ã
) can be produced from a tabletop femtosecond laser . This represents the most extreme >5001 order nonlinear optical process known. X-rays are powerful probes of the nanoworld. They penetrate thick samples and can image small objects. This talk will also highlight how ultrafast x-rays can capture the coupled motions of charges, spins, phonons and photons that underlie function on the fastest timescales. [2,3]
1. Popmintchev et al, Science 336, 1287 (2012).
2. Mathias, et al, PNAS 109, 4792 (2012).
3. Rudolf et al., Nature Commun 3, 1037 (2012).
Friday, November 9, 2012
Physics Building, Room 204
Note special time.
Note special room.
Colloquium: Optical Society of America, UVA Student Chapter
To add a speaker, send an email to
Please include the seminar type (e.g. Colloquia), date, name of the speaker, title of talk, and an abstract (if available).