Redirigiendo al acceso original de articulo en 18 segundos...
Inicio  /  Applied Sciences  /  Vol: 11 Par: 11 (2021)  /  Artículo
ARTÍCULO
TITULO

Light-Induced Ring Pattern in a Dye-Doped Nematic Liquid Crystal

Marcel G. Clerc    
Gregorio González-Cortés    
Paulina I. Hidalgo    
Lucciano A. Letelier    
Mauricio J. Morel and Jorge Vergara    

Resumen

The use of dye-doped liquid crystals allows the amplification of the coupling of light and liquid crystals. Light can induce the self-organization of the molecular order. The appearance of ring patterns has been observed, which has been associated with phase modulation. However, the morphology and dynamics of the ring patterns are not consistent with self-modulation. Based on an experimental setup with two parallel coherence beams orthogonal to a liquid crystal cell, one of which induces photo-isomerization and the other causes illumination, the formation of ring patterns is studied. To use these two coherent beams, we synthesize methylred methyl ester as a dye-dopant, which is photosensitive only to one of the light beams, and a commercial E7 liquid crystal as a matrix. Based on a mathematical model that accounts for the coupling between the concentration of the cis-state and the order parameter, we elucidate the emergence of the rings as forming patterns in an inhomogeneous medium. The bifurcation diagram is analytically characterized. The emergence, propagation of the rings, and the establishment of the ring patterns are in fair agreement with the experimental observations.

 Artículos similares

       
 
Juntong Chen, Man Ge and Lin Li    
In order to increase industrial production quality and efficiency, it is essential to understand how the aeration and no-aeration condition affects liquid and solid material mixing in the stirred tank. Due to complicated shear flows, the related mass-tra... ver más
Revista: Applied Sciences

 
Veyan A. Musa, Raid A. Mahmood, Sherwan M. Simo, Abbas Kh. Ibrahim, Lokman A. Abdulkareem     Pág. 262 - 278
The current study is performed to identify the flow regimes of oil-gas two-phase flow experimentally in a vertical pipe has an internal diameter of 6.7 cm. It also aims to provide more details about the possibility of using Differential Pressure Transduc... ver más

 
Lei Jiang, Ling Bai, Peng Xue, Guangjie Peng and Ling Zhou    
The slurry pump is one of the most important pieces of equipment in mineral transportation and separation systems, and it has complex two-phase flow characteristics and wear mechanisms. By employing numerical and experimental methods, the solid?liquid tw... ver más

 
Xing Yang, Hang Wu and Zhenping Feng    
In this paper, detailed flow patterns and heat transfer characteristics of a jet impingement system with extended jet holes are experimentally and numerically studied. The jet holes in the jet plate present an inline array of 16 × 5 rows in the streamwis... ver más
Revista: Aerospace

 
Khawla S. Khashan, Ghassan M. Sulaiman, Farah A. Abdulameer, Salim Albukhaty, Mohammed A. Ibrahem, Tahani Al-Muhimeed and Abeer A. AlObaid    
Laser ablation in liquid was utilized to prepare a TiO2 NP suspension in in deionized distilled water using Q-switch Nd: YAG laser at various laser energies and ablation times. The samples were characterized using UV?visible absorption spectra obtained w... ver más
Revista: Applied Sciences