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

2017 ◽  
Vol 25 (2) ◽  
pp. 118-126 ◽  
Author(s):  
K.A. Rutkowska ◽  
M. Chychłowski ◽  
M. Kwaśny ◽  
I. Ostromęcka ◽  
J. Piłka ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Light Propagation ◽  
Nematic Liquid Crystals ◽  
Photo Polymerization ◽  
Photonic Structures

TiO2 nanorod arrays induced broad-band reflection in chiral nematic liquid crystals with photo-polymerization network

2018 ◽  
Vol 46 (2) ◽  
pp. 210-218 ◽  
Author(s):  
Yang Liu ◽  
Dong Wang ◽  
Hong Gao ◽  
Jing-jing Zhang ◽  
Yuan Tao ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Nematic Liquid Crystals ◽  
Broad Band ◽  
Nanorod Arrays ◽  
Tio2 Nanorod ◽  
Photo Polymerization ◽  
Chiral Nematic ◽  
Tio2 Nanorod Arrays

scholarly journals Tunable Channel Drop Filter in a Two-Dimensional Photonic Crystal Modulated by a Nematic Liquid Crystal

2006 ◽  
Vol 2006 ◽  
pp. 1-6 ◽  
Author(s):  
Chen-Yang Liu ◽  
Lien-Wen Chen
Keyword(s):  
Liquid Crystals ◽  
Integrated Circuits ◽  
Wavelength Division Multiplexing ◽  
Light Propagation ◽  
Nematic Liquid Crystals ◽  
Fdtd Method ◽  
Wavelength Division ◽  
Resonance Frequencies ◽  
Potential Applications ◽  
Control Light

Photonic crystals (PCs) have many potential applications because of their ability to control light-wave propagation and because PC-based waveguides may be integrated into optical circuits. We propose a novel tunable PC channel drop filter based on nematic liquid crystals and investigate its properties numerically by using the finite-difference time-domain (FDTD) method. The refractive indices of liquid crystals can be actively modulated after infiltrating nematic liquid crystals into the microcavity in PC waveguides with square lattices. Then we can control light propagation in a PC waveguide. We analyze theQ-factors and resonance frequencies of a tunable PC channel drop filter by considering various indices modulation of liquid crystals. The novel component can be used as wavelength division multiplexing in photonic integrated circuits.

scholarly journals Methods for polymer-stabilization of molecular orientation in LC-waveguiding structures

2018 ◽  
Vol 10 (1) ◽  
pp. 11
Author(s):  
Katarzyna Agnieszka Rutkowska ◽  
Miłosz Chychłowski
Keyword(s):  
Liquid Crystals ◽  
Liquid Crystalline ◽  
Light Propagation ◽  
Main Idea ◽  
Polymerization Process ◽  
Liquid Crystal Devices ◽  
Photo Polymerization ◽  
Polymer Liquid Crystals ◽  
Optical Applications ◽  
Liquid Crystalline Material

In this letter we present a new way for constructing and developing LC-based waveguiding structures. Specifically, liquid crystalline material enriched with monomer in the proper proportions is implemented in our approach and a waveguide geometry can be created in the LC cell thanks to the photo-polymerization process allowing for LC molecules to be suspended in desired position and orientation. The latter can be enforced by external fields and UV-irradiation can be performed trough the mask of desired geometry. In this way, regions with different molecular textures (e.g. planar and homeotropic) and thus waveguiding structures can be easily created within LC layer. The main idea of this letter is not only to show a prove-of-concept of the polymer-imposed LC stabilization for such planar optical devices but to discuss differences in methodology of their practical realization. Full Text: PDF ReferencesQ. Li, Liquid crystals beyond displays: chemistry, physics, and applications (John Wiley & Sons, 2012). CrossRef J.P. Lagerwall, G. Scalia, Current App. Phys. 12, 1387 (2012). CrossRef A. Ciferri, Polymer liquid crystals (Elsevier, 2012). DirectLink D. Yang, Fundamentals of liquid crystal devices (John Wiley & Sons, 2014). CrossRef L. Vicari, Optical applications of liquid crystals (CRC press, 2016). DirectLink I. Dierking, Adv Mater 12, 167 (2000). CrossRef K. Rutkowska, M. Chychłowski, M. Kwaśny, I. Ostromęcka, J. Piłka, U. Laudyn, "Light propagation in periodic photonic structures formed by photo-orientation and photo-polymerization of nematic liquid crystals", Opto-Electr. Rev. 25, 118 (2017). CrossRef K A. Rutkowska, M. Chychłowski, U.A. Laudyn, Proc. SPIE 10325, 1032506 (2017). CrossRef B. Turowski, K.A. Rutkowska, Phot. Lett. Poland 9, 82 (2017). CrossRef H. Ren, Y. Lin, S. Wu, Opt. Commun. 261, 296 (2006). CrossRef V. Mucci and C. Vallo, J Appl Polym Sci 123, 418 (2012). CrossRef U.A. Laudyn, M. Kwaśny, K. Jaworowicz, K.A. Rutkowska, M.A. Karpierz, G. Assanto, Phot. Lett. Poland 1, 7 (2009). CrossRef M.S. Chychłowski, S. Ertman, E. Nowinowski-Kruszelnicki, T.R. Woliński, Mol. Cryst. Liquid Cryst. 553, 127 (2012). CrossRef

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 Graphene and chiral nematic liquid crystals: a focus on lasing

RSC Advances ◽  
2015 ◽  
Vol 5 (71) ◽  
pp. 57437-57443 ◽  
Author(s):  
Ammar A. Khan ◽  
Muhammad A. Bin-Kamarudin ◽  
Piran. R. Kidambi ◽  
Stephan Hofmann ◽  
Timothy D. Wilkinson ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Liquid Crystalline ◽  
Laser Emission ◽  
Surface Effect ◽  
Nematic Liquid Crystals ◽  
Photonic Structures ◽  
Chiral Nematic ◽  
Self Assembled ◽  
Grown Graphene

This work presents the interaction of self-assembled liquid crystalline unidimensional photonic structures on the surface of CVD grown graphene. Further, this surface effect is characterised through POM and laser emission features.

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 Fabrication of the liquid crystalline periodic waveguiding structures by means of the photo-polymerization process

2017 ◽  
Vol 9 (3) ◽  
pp. 82 ◽  
Author(s):  
Bartłomiej Turowski ◽  
Katarzyna Agnieszka Rutkowska
Keyword(s):  
Liquid Crystals ◽  
Liquid Crystalline ◽  
Polymer Concentration ◽  
Polymerization Process ◽  
Nonlinear Phenomena ◽  
Photo Polymerization ◽  
Photonic Structures ◽  
Phase Liquid ◽  
Blue Phase ◽  
Polymer Stabilized

Photonic structures in a form of the waveguide channels, with periodic spatial changes in refractive index in the wavelength scale, are typically manufactured based on well-developed silica and gallium arsenide technology [1], as well as with use of the high-precision lithography. The main disadvantage related to practical application of such devices is that their optical properties cannot be altered after fabrication. Due to this fact, liquid crystalline periodic waveguiding structures, manufactured with use of the photo-polymerization process, have been proposed in this work. Importantly, propagational characteristic of such photonic structures can be easily adjusted during fabrication procedure, and then may be also dynamically tuned by e.g. applied external voltage, as presented in this communication. Full Text: PDF ReferencesM.J. Ablowitz, Z.H. Musslimani, "Discrete spatial solitons in a diffraction-managed nonlinear waveguide array: a unified approach", Physica D: Nonlinear Phenomena 184(1), 276 (2003). CrossRef L. Vicari, Optical applications of liquid crystals, CRC press, 2016. CrossRef J. Yan, S.-T. Wu, "Effect of Polymer Concentration and Composition on Blue Phase Liquid Crystals", J. Display Technol. 7, 9 (2011). CrossRef J. Schirmer et al., "Birefringence and Refractive Indices Dispersion of Different Liquid Crystalline Structures", Mol. Cryst. Liquid Cryst. 307, 17 (1997). CrossRef D. Xu et al., "Blue phase liquid crystals stabilized by linear photo-polymerization", Appl. Phys. Lett. 105, 8 (2014). CrossRef I. Dierking et al., "Stabilising liquid crystalline Blue Phases", Soft Matter 8, 4355 (2012). CrossRef K. Kang, L.C. Chien, S. Sprunt, "Polymer-stabilized cholesteric liquid crystal microgratings: a comparison of polymer network formation and electro-optic properties for mesogenic and non-mesogenic monomers", Liquid Crystals 29, 9 (2002). CrossRef K.A. Rutkowska, M. Chychłowski, U.A. Laudyn, "Polymer-stabilized periodic waveguiding structures in liquid crystalline materials", Proc. SPIE 10325 (2017). CrossRef

Non-linear light propagation and bistability in nematic liquid crystals

2009 ◽  
Author(s):  
Jeroen Beeckman ◽  
Kristiaan Neyts ◽  
Wout De Cort ◽  
Abbas Madani
Keyword(s):  
Liquid Crystals ◽  
Light Propagation ◽  
Nematic Liquid Crystals ◽  
Non Linear
Sign in / Sign up

Export Citation Format

Share Document