Transient dipole-interactions on sub-cycle timescales

Friday, August 30, 2019 - 3:00pm to 4:00pm

Speaker:  Lorenz Drescher, Max Born Institute (Berlin)

Program Description:

The interactions of attosecond XUV pulses with matter offer intriguing 
opportunities to study electron dynamics driven by IR fields on a 
sub-cycle timescales. Attosecond transient absorption spectroscopy 
(ATAS) is a quickly emerging method to characterize these light-induced 
effects. We will present a recent study of ATAS on CH3I molecules, that 
shows the state-resolved polarizability of core-excited states. We will 
discuss an analysis method to extract the polarizability and temporal 
behavior from ATAS and discuss the effects of molecular symmetry on the 
ATAS signal.
Besides absorption, the interaction of the induced dipole with the XUV 
field can lead to refraction. We will present a method to measure 
refraction in the XUV spectral region using dense inhomogeneous 
gas-jets. The control over refraction in the XUV region allows to 
develop XUV refractive optics as is demonstrated in an XUV gas lens.

 

 

Transient dipole-interactions on sub-cycle timescales
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