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| Contact: Dr. Jing Jing Wang, Room 3.21, CRANN, Trinity College Dublin, Dublin 2, Ireland. e-mail: jjwang@tcd.ie Tel : +353.1.896 4633, Fax : +353.1.896 3037 |
The Ultrafast Laser Systems are useful tools in the understanding of fast photodynamic processes in physics, chemistry and biology . There are many techniques, such as time-resolved absorption spectroscopy, time-resolved fluorescence spectroscopy and coherent anti-Stokes Raman spectroscopy, have been developed throughout the world. CRANN now has a unique ultrafast laser laboratory to investigate the dynamic processes in materials and the interactions between laser and materials, principally in nanoscale materials such as quantum dots. |
One of well developed techniques to investigate ultrafast phenomena is the pump-probe technique. The sample is excited from its equilibrium position by the pump beam where a transient excited state is created. If the sample is being pumped at regular intervals that are shorter than the excited state lifetime, then this event can be detected by using a serials of delayed laser pulses—probe beam. The pump-probe technique provides information on the relaxation of the excited state in materials. It is one of the most powerful tools for investigating energy and charge transfer processes, coupling of electronic and vibrational degrees of freedom, vibrational and conformational relaxation, isomerisation and so on. |
To make use of these facilities you must complete the User form and submit it. |
| Femtosecond Laser Systems |
Applications
Detailed specifications
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SNOM+AFM+Raman Spectroscopy System |
| Applications
- Multi-photon Fluorescence Microscopy
- Coherent Anti-Stockes Raman Spectroscopy
- AFM, Atomic Force Microscopy
- SNOM, Scanning Near-field Optical Microscope
More information..... |
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