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Nonlinear X-Ray Spectroscopy

Vendredi 12 décembre 2014 11:30 - Duree : 1 heure
Lieu : Room 1-45, LOB Lab and Office Building, ESRF - 71 avenue des Martyrs - Grenoble

Orateur : Sharon SHWARTZ (from Bar-Ilan University, Tel Aviv, Israel)

Ordinary nonlinear optical processes in x-ray regime are known to be very weak, while conventional x-ray sources suffer from insufficient brightness. Nevertheless, recent and expected improvements in brightness and beam quality of x-ray sources, together with new facilities such as the x-ray free-electron laser, offer the possibility of extending the concepts of nonlinear and quantum optics into x-ray energies. The new facilities with their increased power allow the observation of new x-ray nonlinear and quantum effects. Indeed, recently, the number of works associated with nonlinear and quantum effects in the x-ray regime, is growing rapidly.

I will describe recently performed and proposed experiments at x-ray wavelengths including x-ray and visible wave mixing [1], x-ray second harmonic generation [2], x-ray parametric down-conversion [3,4], and the generation of optical radiation from two x-pulses. I will discuss future directions of implementing nonlinear x-ray techniques as tools for spectroscopy and studies of ultrafast effects. For example, x-ray parametric down-conversion may be developed into a very powerful method to image nano-scale objects. X-ray and visible mixing may lead to atomic scale resolution techniques to study chemical bonds. Nonlinear techniques are expected to be useful in the inspection of sub-femtosecond temporal pulses.

[1] T. E. Glover et al., Nature 488, 603 (2012).

[2] S. Shwartz et al. Phys Rev. Lett. 112, 163901 (2014)

[3] S. Shwartz et al. Phy. Rev. Lett. 109, 013602 (2012).

[4] K. Tamasaku, K. Sawada, E. Nishibori, and T. Ishikawa, Nature Phys. 7, 705 (2011).

Contact : marco.moretti@esrf.fr

Discipline évènement : (Physique)
Entité organisatrice : (ESRF)
Nature évènement : (Séminaire)
Site de l'évènement : Polygone scientifique

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