NDLI: Self-induced three-level echo

Content Provider	Springer Nature Link
Author	Basharov, A. M.
Copyright Year	2006
Abstract	A new type of three-level photon echo has been predicted and analytically described. In contrast to the conventional three-level echo, whose formation involves three resonant ultrashort excitation pulses spaced in time, two of which are resonant to different optically allowed and adjacent transitions with different frequencies, the echo predicted arises under the conditions of formation of the conventional two-pulse echo and requires only two pump pulses of the same frequency. A theory is developed for the conditions of experiments on generation of a superradiance pulse at the $^{3}$ P $_{0}$-$^{3}$ H $_{6}$ transition in impurity praseodymium ions in the LaF$_{3}$ matrix upon ultrashort coherent excitation of the adjacent optically allowed $^{3}$ H $_{4}$-$^{3}$ P $_{0}$ transition in praseodymium. It is shown that the superradiance pulse after its deexcitation does not polarize the medium at the $^{3}$ P $_{0}$-$^{3}$ H $_{6}$ generation transition and completely eliminates polarization at the $^{3}$ H $_{4}$-$^{3}$ P $_{0}$ excitation transition. However, simultaneously, the superradiance pulse transfers the optical coherence from the excitation transition to the optically forbidden $^{3}$ H $_{6}$-$^{3}$ H $_{4}$ transition. Thus, the phase memory about the effect of the excitation superradiance pulse is retained in the medium within a time interval that is shorter than the irreversible relaxation time of the optically forbidden transition.
Starting Page	422
Ending Page	433
Page Count	12
File Format	PDF
ISSN	0030400X
Journal	Optics and Spectroscopy
Volume Number	101
Issue Number	3
e-ISSN	15626911
Language	English
Publisher	Nauka/Interperiodica
Publisher Date	2006-01-01
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Optical Spectroscopy, Ultrafast Optics
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Electronic, Optical and Magnetic Materials

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