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Ultrafast Belfast Group

Ultrafast Belfast Group
The Ultrafast Belfast Research group uses state-of-the-art laser technology to study ultrafast molecular dynamics. We are part of the Centre for Plasma Physics, at Queen's University Belfast, in Northern Ireland.  
We use femtosecond laser pulses to initiate and control molecular motion on ultrashort timescales. In our research we have imaged the motion of fundamental molecules, and demonstrated control over molecular fragmentation. Through new techniques using electrostatic ion traps, we are pursuing high-resolution studies of larger polyatomic molecules, with unique applications for research at the Life-Science interface.
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5 April 2016

Ultrafast Belfast hosts 2nd COST XLIC WG3 meeting
From 4th-5th of April 2016, the Ultrafast Belfast group hosted the 2nd meeting of the COST action - XLIC (XUV/X-Ray Light and Fast Ions for Ultrafast Chemistry) Working Group 3. The topic of interest of this group is the control of reactivity of highly excited and/or ionized molecules through pump-probe techniques and High Harmonic spectroscopy.

The meeting proved successful in provoking thoughts and discussions between both theoretical and experimental physicists/chemists in the subject of chemical control. There were 35 paticipants from all over Europe, with 18 speakers, and 14 poster presenters.
There was even enough time to take a quick photo in the shadows of Lord Kelvin
13 January 2016

Ultrafast Belfast Student Wins Poster Prize At Recent Conference
PhD student Jordan Miles won runner-up poster prize at the RSC Spectroscopy and Dynamics Group Meeting (SDGM) at the University of Warrick from 5-7th January 2016.

The poster summarised interesting results on ultrafast non-radiative decay of gas-phase nucleosides. This research was recently published in the journal PCCP and can be found here.
XLIC Conference Anouncement: WG3 Meeting, 4-6 April 2016, Queen's University Belfast
Queen's University Belfast will host the next Working Group Meeting on Control of Chemical Reactivity. This event is part of the XLIC COST action.

More informations will be available soon in the following link.
XLIC Conference Event
13 August 2015

Ultrafast relaxation processes from first excited states in gas-phase nucleosides
DNA Decay Abstract
The ultrafast photo-physical properties of DNA are crucial in providing a stable basis for life. The efficient internal conversion process, which converts the electronic energy in vibration energy to the surrounding environment, has been already observed in isolated bases. The present work, showing the first gas-phase measurements of electronic relaxation in DNA nucleosides, represents a natural next step in bottom-up understanding of DNA photo-physics.  
The experimental lifetime of internal conversion to the ground state is observed to be shorter about half the lifetime of the relative bases, possibly due to an additional relaxation pathway mediated by proton transfer through a sugar to base hydrogen bond. 
17 October 2014

Our Team Observes Electron Motion in a Biological Molecule on an Attosecond Timescale!
The work, reported in Science, was carried out using some of the shortest laser pulses in the world which were used as strobe lighting to track the ultrafast movement of the electrons within the nanometer-sized molecule. These attosecond laser pulses were used to initially stimulate the electrons and then to observe their resulting collective oscillations which lasted for 4300 attoseconds (billion-billionths of a second), the fastest process ever observed in a biological structure.

Explaining how electrons move on the nanoscale is crucial for the understanding of a range of processes in biology as it is this charge which initiates chemical reactions. For instance the charge produced from the interaction of ionizing radiation with DNA and its subsequent ultrafast excursions is crucial in determining the resulting damage to the DNA which can result in cell death or mutations. This knowledge is important for understanding the action of radiotherapy beams in cancer treatment. 
Laser Molecule Interaction
Being able to describe how light interacts with electrons on these timescales could also lead to the technological improvements such as solar cells which collect electrons more efficiently or faster microprocessors which use light rather than electrical signals for switching transistors.

The attosecond laser used for the research was developed at the Politecnico di Milano as part of a long-standing collaboration between Professor Mauro Nisoli and Dr Francesca Calegari (IFN-CNR), and the study of electrons in biomolecules has since 2012 been the product of a collaboration with Ultrafast Belfast.