scholarly journals Spectral Properties of Photo-Aligned Photonic Crystal Fibers Infiltrated with Gold Nanoparticle-Doped Ferroelectric Liquid Crystals

Crystals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 785
Author(s):  
Daniel Budaszewski ◽  
Kaja Wolińska ◽  
Bartłomiej Jankiewicz ◽  
Bartosz Bartosewicz ◽  
Tomasz Ryszard Woliński
Keyword(s):  
Liquid Crystals ◽  
Photonic Crystal ◽  
Azo Dye ◽  
Light Propagation ◽  
Response Times ◽  
Photonic Crystal Fibers ◽  
Ferroelectric Liquid Crystal ◽  
Ferroelectric Liquid Crystals ◽  
Gold Nps ◽  
Crystal Fibers

This paper describes our recent results on light propagation in photonic crystal fibers (PCFs) partially infiltrated with W212 ferroelectric liquid crystal (FLC) doped with 1–3 nm gold nanoparticles (NPs) with a concentration in the range of 0.1–0.5% wt. Based on our previous results devoted to PCFs infiltrated with nematic liquid crystals (NLCs) doped with gold NPs (GNPs), we extend our research line with FLCs doped with these NPs. To enhance the proper alignment of the NP-FLC nanocomposites inside PCFs, we applied an additional photo-aligning layer of SD-1 azo-dye material (DIC, Japan). Electro-optical response times and thermal tuning were studied in detail. We observed an improvement in response times for NP-FLC nanocomposites in comparison to the undoped FLC.

Nonlinear light propagation in photonic crystal fibers filled with nematic liquid crystals

2007 ◽  
Author(s):  
Katarzyna A. Rutkowska ◽  
Urszula A. Laudyn ◽  
Robert T. Rutkowski ◽  
Miroslaw A. Karpierz ◽  
Tomasz R. Wolinski ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Photonic Crystal ◽  
Light Propagation ◽  
Photonic Crystal Fibers ◽  
Nematic Liquid Crystals ◽  
Crystal Fibers

scholarly journals Photonic Crystal Fibers infiltrated with Ferroelectric Liquid Crystals

2010 ◽  
Vol 2 (3) ◽  
Author(s):  
Daniel Budaszewski ◽  
Tomasz R. Woliński ◽  
Morten Geday ◽  
José Manuel Otón
Keyword(s):  
Liquid Crystals ◽  
Photonic Crystal ◽  
Photonic Crystal Fibers ◽  
Ferroelectric Liquid Crystals ◽  
Crystal Fibers

Linear and nonlinear properties of photonic crystal fibers filled with nematic liquid crystals

2006 ◽  
Vol 14 (4) ◽  
Author(s):  
K. Brzdąkiewicz ◽  
U. Laudyn ◽  
M. Karpierz ◽  
T. Woliński ◽  
J. Wójcik
Keyword(s):  
Liquid Crystals ◽  
Photonic Crystal ◽  
Light Propagation ◽  
Near Infrared ◽  
Photonic Crystal Fibers ◽  
Water Solution ◽  
Nematic Liquid Crystals ◽  
Optical Power ◽  
Linear And Nonlinear ◽  
Crystal Fibers

AbstractWe investigate linear and nonlinear light propagation in the photonic crystal fibers infiltrated with nematic liquid crystals. Such a photonic structure, with periodic modulation of refractive index, which could be additionally controlled by the temperature and by the optical power, allows for the study of discrete optical phenomena. Our theoretical investigations, carried out with the near infrared wavelength of 830 nm, for both focusing and defocusing Kerr-type nonlinearity, show the possibility of the transverse light localization, which can result in the discrete soliton generation. In addition, we present the preliminary experimental results on the linear light propagation in the photonic crystal fiber with the glycerin-water solution and 6CHBT nematics, as the guest materials.

scholarly journals Light propagation in a photonic crystal fiber infiltrated with mesogenic azobenzene dyes

2017 ◽  
Vol 9 (2) ◽  
pp. 51 ◽  
Author(s):  
Daniel Budaszewski ◽  
Tomasz R Woliński
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Light Propagation ◽  
Photonic Bandgap ◽  
Photonic Crystal Fibers ◽  
Crystal Fiber ◽  
Photonic Bandgap Fibers ◽  
Crystal Fibers

In this paper, light propagation in an isotropic photonic crystal fiber as well in a silica-glass microcapillary infiltrated with a mesogenic azobenzene dye has been investigated. It appeared that light spectrum guided inside the photonic crystal fiber infiltrated with the investigated azobenzene dye depends on the illuminating wavelength of the absorption band and on linear polarization. Also, alignment of the mesogenic azobenzene dye molecules inside silica glass microcapillaries and photonic crystal fibers has been investigated. Results obtained may lead to a new design of optically tunable photonic devices. Full Text: PDF ReferencesP. Russell. St. J. "Photonic-Crystal Fibers", J. Lightwave Technol. 24, 4729 (2006). CrossRef T. Larsen, A. Bjarklev, D. Hermann, J. Broeng, "Optical devices based on liquid crystal photonic bandgap fibres", Opt. Exp. 11, 2589 (2003). CrossRef D. C. Zografopoulos, A. Asquini, E. E. Kriezis, A. d'Alessandro, R. Beccherelli, "Guided-wave liquid-crystal photonics", Lab Chip, 12, 3598 (2012). CrossRef F. Du, Y-Q. Lu, S-T. Wu, "Electrically tunable liquid-crystal photonic crystal fiber", Appl. Phys. Lett 85, 2181 (2004) CrossRef D. C. Zografopoulos, E. E. Kriezis, "Tunable Polarization Properties of Hybrid-Guiding Liquid-Crystal Photonic Crystal Fibers", J. Lightwave Technol. 27 (6), 773 (2009) CrossRef S. Ertman, M. Tefelska, M. Chychłowski, A. Rodriquez, D. Pysz, R. Buczyński, E. Nowinowski-Kruszelnicki, R. Dąbrowski, T. R. Woliński. "Index Guiding Photonic Liquid Crystal Fibers for Practical Applications", J. Lightwave Technol. 30, 1208 (2012). CrossRef D. Noordegraaf, L. Scolari, J. Laegsgaard, L. Rindorf, T. T. Alkeskjold, "Electrically and mechanically induced long period gratings in liquid crystal photonic bandgap fibers", Opt. Expr. 15, 7901 (2007) CrossRef M. M. Tefelska, M. S. Chychlowski, T. R. Wolinski, R. Dabrowski, W. Rejmer, E. Nowinowski-Kruszelnicki, P. Mergo, "Photonic Band Gap Fibers with Novel Chiral Nematic and Low-Birefringence Nematic Liquid Crystals", Mol. Cryst. Liq. Cryst. 558(1), 184 (2012). CrossRef S. Mathews, Y. Semenova, G. Farrell, "Electronic tunability of ferroelectric liquid crystal infiltrated photonic crystal fibre", Electronics Letters, 45(12), 617 (2009). CrossRef V. Chigrinov, H-S Kwok, H. Takada, H. Takatsu, "Photo-aligning by azo-dyes: Physics and applications", Liquid Crystals Today, 14:4, 1-15, (2005) CrossRef A. Siarkowska, M. Jóźwik, S. Ertman, T.R. Woliński, V.G. Chigrinov, "Photo-alignment of liquid crystals in micro capillaries with point-by-point irradiation", Opto-Electon. Rev. 22, 178 (2014); CrossRef D. Budaszewski, A. K. Srivastava, A. M. W. Tam, T. R. Woliński, V. G. Chigrinov, H-S. Kwok, "Photo-aligned ferroelectric liquid crystals in microchannels", Opt. Lett. 39, 16 (2014) CrossRef J-H Liou, T-H. Chang, T. Lin, Ch-P. Yu, "Reversible photo-induced long-period fiber gratings in photonic liquid crystal fibers", Opt. Expr. 19, (7), 6756, (2011) CrossRef T. T. Alkeskjold, J. Laegsgaard, A. Bjarklev, D. S. Hermann, J. Broeng, J. Li, S-T. Wu, "All-optical modulation in dye-doped nematic liquid crystal photonic bandgap fibers", Opt. Exp, 12 (24), 5857 (2004) CrossRef K. Ichimura, Y. Suzuki, T. Seki, A. Hosoki, K. Aoki, "Reversible change in alignment mode of nematic liquid crystals regulated photochemically by command surfaces modified with an azobenzene monolayer", Langmuir, 4, 1214 (1988) CrossRef http://www.beamco.com/Azobenzene-liquid-crystals DirectLink K. A. Rutkowska, K. Orzechowski, M. Sierakowski, "Wedge-cell technique as a simple and effective method for chromatic dispersion determination of liquid crystals", Phot. Lett, Poland, 8(2), 51 (2016). CrossRef L. Deng, H.-K. Liu, "Nonlinear optical limiting of the azo dye methyl-red doped nematic liquid crystalline films", Opt. Eng. 42, 2936-2941 (2003). CrossRef J. Si, J. Qiu, J. Guo, M. Wang, K. Hirao, "Photoinduced birefringence of azodye-doped materials by a femtosecond laser", Appl. Opt., 42, 7170-7173 (2008). CrossRef

Liquid crystal alignment in cylindrical microcapillaries

2012 ◽  
Vol 20 (1) ◽  
Author(s):  
M. Chychłowski ◽  
O. Yaroshchuk ◽  
R. Kravchuk ◽  
T. Woliński
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Photonic Crystal ◽  
Boundary Conditions ◽  
Photonic Crystal Fibers ◽  
Optical Devices ◽  
Liquid Crystal Alignment ◽  
Disclination Line ◽  
Crystal Alignment ◽  
Crystal Fibers

AbstractA 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.

Nonlinear effects in photonic crystal fibers filled with nematic liquid crystals

Open Physics ◽  
2008 ◽  
Vol 6 (3) ◽  
Author(s):  
Urszula Laudyn ◽  
Katarzyna Rutkowska ◽  
Robert Rutkowski ◽  
Mirosław Karpierz ◽  
Tomasz Woliński ◽  
...  
Keyword(s):  
Refractive Index ◽  
Liquid Crystals ◽  
Photonic Crystal ◽  
Low Power ◽  
Light Beam ◽  
Photonic Crystal Fibers ◽  
Nematic Liquid Crystals ◽  
Nonlinear Effects ◽  
The Creation ◽  
Crystal Fibers

AbstractWe have investigated the nonlinear propagation of light in photonic crystal fibers filled with nematic liquid crystals. We analyzed a configuration with a periodic modulation of the refractive index corresponding to a matrix of waveguides. Matrices of coupled waveguides allow observing a variety of new phenomena both for low power light beam propagation and with an existence of nonlinear effects. The opportunity for the creation of solitary waves caused by the interplay between diffraction and nonlinear effects in these kinds of fibers is investigated. At low power the propagating light beam spreads as it couples to more and more waveguides. When the intensity is increased the light modifies the refractive index distribution, inducing a defect in the periodic structure. The creation of such a defect can lead to a situation in which the light becomes self-localized and its diffractive broadening is eliminated. Eventually, in the case of positive Kerr-type nonlinearity, a discrete soliton can be created. In the case of negative nonlinearity the refractive index decreases with the optical power and can lead to bandgap shifting. The incident beam, with a frequency initially within the bandgap, is then turned outside the bandgap resulting in the changing of the propagation effect for the discrete diffraction effect. As a consequence the delocalization of the light can be observed.

Linear properties of photonic crystal fibers filled with nematic liquid crystals

2007 ◽  
Author(s):  
Katarzyna A. Brzdąkiewicz ◽  
Urszula A. Laudyn ◽  
Mirosław A. Karpierz ◽  
Tomasz R. Woliński ◽  
Jan Wójcik
Keyword(s):  
Liquid Crystals ◽  
Photonic Crystal ◽  
Photonic Crystal Fibers ◽  
Nematic Liquid Crystals ◽  
Crystal Fibers
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