Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 3

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Light propagation in periodic photonic structures formed by photo-orientation and photo-polymerization of nematic liquid crystals

Rutkowska K. A., Chychłowski M., Kwaśny M., Ostromęcka I., Piłka J., Laudyn U. A.

Opto-Electronics Review

2017

Vol. 25, No. 2

118--126

Propagation of linearly polarized light beams in a nematic liquid crystal cell with distinguished regions of different molecular orientation has been analyzed. Specifically, combination of the planar/homogenic and homeotropic alignment, forming thus spatially limited regions characterized by a different LC molecular orientation, has been tested, as achieved by means of the photo-orientation and photo-polymerization processes, independently. An influence of molecular orientation on the light beam propagation has been checked for different directions of the linear polarization. Thanks to the molecular reorientation induced by the low frequency external electric field and also to the reorientational nonlinearity taking place in NLCs, propagation direction of the light beam can be additionally controlled by the electric bias and/or optical power, respectively. Proposed structural solutions and techniques, related to the photo-orientation and photo-polymerization processes described in this communication, give rise to the novel LC geometries and structures. The latter act as promising candidates for new practical photonic applications as they are expected to be of a particular importance for integrated optic elements and devices.

Liquid crystal alignment in cylindrical microcapillaries

Chychłowski M., Yaroshchuk O., Kravchuk R., Woliński T.

Opto-Electronics Review

2012

Vol. 20, No. 1

47-52

A variety of alignment configurations of liquid crystals (LCs) inside the glassy cylindrical capillaries is realized by using alignment materials providing different anchoring. The radial configuration with central disclination line is obtained for homeotropic boundary conditions. In turn, the axial, transversal and tilted alignment structures are realized by using materials for planar anchoring. The uniformity and controlling of the latter structures were provided by photoalignment method. This approach can be further used to control LC alignment in the photonic crystal fibers recognized as advanced elements for different optical devices.

Fotoniczne światłowody ciekłokrystaliczne jako całkowicie światłowodowe układy czujnikowe

Woliński T., Chychłowski M., Czapla A., Dąbrowski R., Domański A. W., Ertman S., Godyń K., Nowinowski-Kruszelnicki E., Tefelska M., Wójcik J.

Elektronika : konstrukcje, technologie, zastosowania

2008

Vol. 49, nr 6

199-200

W pracy przedstawiono najnowsze wyniki badań nad ciekłokrystalicznymi światłowodami fotonicznymi pod wpływem zewnętrznych oddziaływań, takich jak temperatura, pole elektryczne i ciśnienie hydrostatyczne. Zaprezentowano również potencjalne możliwości zastosowania ciekłokrystalicznych światłowodów fotonicznych do budowy wieloparametrowych czujników nowej generacji.

In this paper latest research activities on photonic liquid crystal fibers under the influence of external fields such as temperature, electric field and hydrostatic pressure were presented. Potential application possibilities of the photonic liquid crystal fibers to multi-parameter sensing are also discussed.