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Thermal tunability of photonic bandgaps in photonic crystal fibers selectively filled with nematic liquid crystal
(2010-12-01)
We address the bandgap effect and the thermo-optical response of high-index liquid crystal (LC) infiltrated in photonic crystal fibers (PCF) and in hybrid photonic crystal fibers (HPCF). The PCF and HPCF consist of solid-core ...
The improvement of thin polymer film properties through plasma immersion ion implantation and deposition technique
(2001-12-01)
Thin polymer films were deposited from acetylene and argon mixtures by plasma immersion ion implantation and deposition. The effect of the pulse frequency, v, on molecular structure, optical gap, contact angle and hardness ...
Structural and optical properties o plasma-deposited a-C:H:Si:O:N films
(2021-01-01)
Thin a-C:H:Si:O:N films were deposited from plasmas fed hexamethyldisiloxane, oxygen and nitrogen, and characterized as a function of the partial pressure of oxygen in the feed, Rox. Deposition rates varied from 10 to 27 ...
Photonic properties of pzt powders along the crystallization process of the polymeric precursor
(2018-01-01)
Lead zirconate titanate (PZT) is a wide versatile material applied in several electronic devices. Some of dielectric and piezoelectric characteristics depend on phase formation, crystallization and composition. In this ...
Doping Effects On Variable Optical Band Gap Amorphous Silicon Nitride Compounds.
(D. Reidel Publ Co, Dordrecht, Neth, 1984)
Optical and mechanical design of an ophthalmic instrument: Slit lamp
(World Scientific Publ Co Pte Ltd, 1997-01-01)
This work has as objective to develop an interesting research line in the Optical Instrumentation area, that is to associate the Optical Design to the Ophthalmology area. The purpose of it is handling the optical design ...
Study of the influence of Eu3+ ions in the bandgap of K2NdNb5O15Nanopowders
(2015-01-01)
Ferroelectric semiconductors oxides with tetragonal tungsten bronze TTB-type structure doped with rare earth ions have been investigated in recent years due their promising optical properties. K2Nd(1-x)EuxNb5O15 nanopowders, ...
Multilayer Perceptron Models for Band Diagram Prediction in bi-dimensional Photonic Crystals
(2019-01-11)
We modeled Multilayer Perceptron (MLP) Artificial Neural Network for predicting band diagrams (BD) of bi-dimensional photonic crystals. Datasets for MLP training were created by relating geometric and material properties ...