Lithium nanoparticles in lithium fluorite crystals

Femtosecond holography in lithium niobate crystals.

Spatial gratings are recorded holographically by two femtosecond pump pulses at 388 nm in lithium niobate (LiNbO3) crystals and read out by a Bragg-matched, temporally delayed probe pulse at 776 nm. We claim, to our knowledge, the first holographic pump-probe experiments with subpicosecond temporal resolution for LiNbO3. An instantaneous grating that is due mostly to the Kerr effect as well as ...

Dielectric properties of lithium triborate single crystals

LITHIUM PRECIPITATES IN GERMANIUM CRYSTALS 495 Investigation of Lithium Precipitates in Germanium Crystals by Anomalous X-Ray Transmission

The precipitation of lithium dissolved in germanium crystals and the re-solution of the pre­ cipitates during heating has been studied by means of anomalous transmission of x-rays. The effec­ tive absorption coefficient depends sensitively on the spacial distribution of lithium interstitials, and is enhanced enormously if pair correlations increase, as is the case during clustering. On the basi...

Femtosecond time-resolved absorption processes in lithium niobate crystals.

Femtosecond pump pulses are strongly attenuated in lithium niobate owing to two-photon absorption; the relevant nonlinear coefficient beta(p) ranges from approximately 3.5 cm/GW for lambda(p) = 388 nm to approximately 0.1 cm/GW for 514 nm. In collinear pump-probe experiments the probe transmission at the double pump wavelength 2lambda(p) = 776 nm is controlled by two different processes: A dire...

Interaction of light with impurities in lithium niobate crystals

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