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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:08 |
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Conference: Bucharest University Faculty of Physics 2001 Meeting
Section: Optics and Spectroscopy
Title:
Lay-out of a PUMP and PROBE LASER SYSTEM for Studying
Molecular Photophysics in the Nanosecond Time Domain
Authors:
Mironel ENESCU, Mihai Lucian PASCU, Alexandru PASCU
Affiliation:
INFLPR Bucuresti
E-mail
Keywords:
Abstract:
Some photophysical properties of molecules involved in biophysical/biomedical
areas lay in the nanosecond time scale (e.g. the life-time of the excited states of Porphyrin
and its derivatives - a class of substances applied in cancer treatment). Accordingly, it is a
must that methods employed to study these properties to have suitable time resolution.
The report will describe the experimental lay-out of a laser system used to study
the TRANSIENT ABSORPTION of the molecules of the kind, based on the
PUMP-and-PROBE method.
The key features of the described system are:
· The pulse duration: 1 nanosecond
· The energy of the pump pulse: 20 microjoules
· The time resolution: 0.5 nanoseconds
· The maximum time-span between the pump and the probe pulses: 20 nanoseconds
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