Polarization photon echo spectroscopy
1993
A review of theoretical and experimental works on the polarization
photon-echo spectroscopy (PPE spectroscopy) is carded out. The main
attention is payed to the following advantages of the PPE spectroscopy. First,
the PPE spectroscopy, free of the influence of the inhomogeneous spectral
line broadening, allows to make the high precision measurements within the
envelope of a inhomogeneously broadened spectral line. Second, the high
resolution ability of the PPE spectroscopy, directly in the temporal field,
unables to accomplish the investigations of the fast relaxation processes, when
ultrashort nano- and picosecond exciting pulse are used. Third, in the PPE
spectroscopy the investigated relaxation processes are not subjected to the
perturbing action of the intensive laser radiation. Farther, it is necessary to
note the flexibility of the PPE spectroscopy consisting in the existence of a
great number of various methods used for receiving different spectroscopic
information. Finally, as far as the signal intensifies of the photon echo and of
its variants are proportional to the squared number of the resonant atoms
(molecules), it secures the definite advantages for the PPE spectroscopy as
compared to the spectroscopk methods based on the non-coherent
phenomena (especially for low pressure a gas considered).
The possibilities of new experiments on photon echo and its variants aimed
for obtaining a detailed new spectroscopic information are discussed.
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