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Characterization
and optimizing of new and modified Photorefractive materials:
- Sn2P2S6
(nominally undoped and doped with Fe, Sn, Pb, etc.);
- periodically poled
lithium niobate with Fe;
- CdTe : Ge, CdTe
: Sn;
-
CdF2 : Ga.
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Study of the dynamics of coherent oscillation with four-wave
mixing:
- oscillation threshold
as a critical point of optical phase transition (First order
or Second order optical phase transition);
- Supercritical bifurcations
in oscillation spectra;
-
double-frequency and multi-frequency oscillation in phtorefractive
crystals with two types of movable carriers; optical multivibrator;
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Study of parametric interactions of four co-propagating light
waves in photorefractives:
- parametric amplification
and oscillation;
- investigation of
parametric scattering;
-
parametric processes in crystals with domain lattices.
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Study of bulk photovoltaic effect and related optics nonlinearity:
-
photovoltaic charge transport in PPLN.
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Study of feed-back assisted grating recording in photorefractive
crystals:
- feed back for photorefractives
with local response;
-
feed-back for crystal with nonlocal response
- feed-back for crystals
with two types of charge carriers.
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Study of space-charge wave excitation in semiconductor photorefractive
materials:
- direct optical
detection of space charge waves;
- generations of
spatial subharmonics;
-
optical sensitization of semiconductor photorefractive materials;
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Study of light pulse slowing-down, trapping and release that
is due to self diffraction from the dynamic gratings in photorefractive
materials:
- pulse slowing down in Sn2P2S6;
- pulse slowing down in BaTiO3;
- pulse slowing down in SBN with applied electric field.
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