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- The effects of optical hysteresis and of optical
bistability were found in impurity cholesteric liquid crystals with helical
distributed feedback that exist at a relatively low threshold of the laser
intensity (5 kW/cm2) and have a fast switching time (8 ns).
Author's certificate number 1336767, on May 8,
1987 issued by the USSR State Committee for Inventions and Discoveries for
"Method development of optical bistability and bistable optical cell",
the authors were M. Kukhtarev, G. Klimusheva, L. Zagaynova, I. Krzhanovskiy, N. Lihum.
- Techniques for fabrication of new composite materials
based on mesomorphic glasses of metal-alkanoates with different organic impurities as well
as with semiconductor and metallic nanoparticles are developed.
G.Klimusheva, Yu. Garbovskiy, S. Bugaychuk, A. Tolochko.
- The effect of formation of a bi-layer cell
(«a nano-sized layer of electro-chromic dye (viologen) – a layer of lyotropic
ionic liquid crystal&ruquo;) under applying dc electrical field was found. Dynamic
hologram recording was realized in such cells that is characterised by nanosecond
time of the grating recording and microsecond time of the grating decay. A new
nonlinear-optical mechanism of reversible photoconversion of viologen dimmers into
cation-radicals was found and investigated theoretically. Such materials are promising
for applications in devices for photonics, fast recording and processing of optical
information.
A.Bordyuh, G.Klimusheva, S.Bugaychuk, Yu.Garbovsky
- It was found that the most effective transport
of the charge carriers (the potassium cations) in lyotropic ionic liquid crystal
(which is a smectic electrolyte) occurs along nanosized two-dimensional cation-anion
layers contining water molecules. As a result, a mobility of potassium cations becomes
in several times greater compared with bulk (three-dimensional) isotropic solutions.
Yu.Garbovskiy, A.Koval'chuk, G.Klimusheva.
- It was shown that covering a dye film with a lyotropic
ionic liquid crystal layer (preparation of a double-layer cell) makes the possibility
to record only dynamic holographic gratings in contrast to the case of uncovered dye
films where only stationary holographic relief grating recording occurs.
Yu.Garbovskiy, G.Klimusheva, S.Bugaychuk.
- It was found that anisotropic glasses based on
cobalt-alkanoates with intrinsic layered structure demonstrate an efficient third-order
nonlinear-optical response, which has an electronic origin (a mechanism of laser-induced
electronic nonlinear polarization), at nanosecond time scale.
F.Gridyakina, G.Klimusheva, S.Bugaychuk, A.Tolochko.
- Strong thermo-optical nonlinearity in cadmium octanoate
composites of metal alkanoate glasses containing CdSe nanoparticles has been discovered
at relatively low-power CW laser irradiation.
A.Lyashchova, D.Fedorenko, Yu.Garbovskiy, G.Klimusheva.
- The complex Ginzburg-Landau equation has been obtained
for the case of interaction of coherent waves in a dynamic nonlinear medium. The
pecularities of dissipative solitons in such systems are under study.
S.Bugaychuk, A.Iljin -
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