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Attosecond X-ray Molecular Dynamics and Strong-Field Control

Objective

The development in recent years of ultrashort light sources in the attosecond regime has opened new avenues for the investigation of electronic and nuclear dynamics. In particular, the current development of UV-XUV or UV-X-ray pump-probe schemes with subfemtosecond temporal resolution represents a doorway to study chemical reactions in excited states of molecules in real-time, including biological reactions, such as e.g. those related to DNA damage and mutations.
The aim of this project is to understand and ultimately control photochemical reactions in excited states of polyatomic molecules, especially relating to two fundamental processes in biology and chemistry: (i) cis-trans photoisomerization and (ii) the internal conversion of pi-pi*/n-pi* states in organic chromophores. Two top-notch experimental methods will be employed to achieve this goal: attosecond X-ray transient absorption (X-ATAS) at the University of California at Berkeley (United States), where the fellowship will be carried out under the supervision of Prof. S. Leone, and three-color femtosecond pump-probe velocity map imaging (fs-VMI) at Complutense University of Madrid (Spain), where the incoming phase will take place under the supervision of Prof. L. Bañares.
The project is divided in three specific objectives and work-packages. Firstly, the powerful X-ATAS method will be employed to observe dynamics in real-time through individual carbon atom spectra and disentangle the dynamics underlying these processes in two polyatomic targets –nitroethylene and transbutadiene– and two bio-relevant ones –thymine and citosine. Secondly, attosecond control in real-time using X-ATAS on the pi-pi*/ n-pi* internal conversion in thymine will be performed in a pioneering experiment. Finally, effective femtosecond control with fs-VMI of these processes in nitroethylene and trans-butadiene, molecules of interest for technologies, will be performed based on the relevant results from the X-ATAS experiments.
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Coordinator

UNIVERSIDAD COMPLUTENSE DE MADRID

Address

Avenida De Seneca 2
28040 Madrid

Spain

Activity type

Higher or Secondary Education Establishments

EU Contribution

€ 245 732,16

Partners (1)

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THE REGENTS OF THE UNIVERSITY OF CALIFORNIA

Project information

Grant agreement ID: 842539

Status

Ongoing project

  • Start date

    20 May 2019

  • End date

    19 May 2022

Funded under:

H2020-EU.1.3.2.

  • Overall budget:

    € 245 732,16

  • EU contribution

    € 245 732,16

Coordinated by:

UNIVERSIDAD COMPLUTENSE DE MADRID

Spain