CLIO is an infrared, pulsed and tunable
energy of infrared photons corresponds to the vibration and rotation
modes of molecules, or to the bandgap of some semiconductors, for
: the full tunability of the free-electron laser over a wide spectral range allows
one to scan for the specific infrared spectrum of a molecule or target
directly one of its absorption peak.
: the laser bursts are picoseconds (10-12s)
long. Phenomena with this temporal scale or longer can then be
investigated, for cinematic studies. High peak powers usually come with
short pulses : 10-100 MW is enough to trigger non-linear
All these features allow to do some (rather fundamental) studies in
chemistry or physics and answer questions like :
How behave molecules at the surface of an
electrode in electrochemistry ?
What kind of reactional intermediate appears in
a chemical reaction ?
What is the lifetime of an excited state in a
dot ('artificial atom') ? Is it possible to achieve population
inversion in such a system, and how much optical gain is available ?
Is it possible to do some 'chemical mapping' of
bacterium by coupling the laser with a microscope ? What is the best
spatial resolution achievable ? (beating the diffraction limit !)