Search
524 articles for “crystallization”
-
Total-internal-reflection-based optical rotation quasi-phase-matching for efficient second-harmonic generation in Cadmium Germanium Arsenide crystal
Abstract: This study investigates a total-internal-reflection (TIR)-based optical rotation quasi-phase-matching (ORQPM) approach for second harmonic generation within a cadmium germanium arsenide crystal slab. The crystal is coated with a thin film of yttrium oxide to facilitate precise control over phase shifts between p- and s-polarized light upon reflection at the slab-film interface. By leveraging the interplay between TIR- induced optical rotation and fractional QPM effects at designated bounce points, the configuration …
Published in International Journal of Crystalline Materials · Vol. 3, Issue 1, 2026 · pp. 01–09 Read article
-
Growth, XRD, FTIR and Second Order NLO studies of Undoped and Zinc Sulphate doped L-Histidine Single Crystals
Abstract: AbstractSingle crystals of pure (undoped) L-histidine and Zinc sulphate doped L-histidine have been synthesized and grown by slow evaporation method using water as the solvent. These grown crystals are characterized by FTIR, XRD and SHG. From Fourier transform infrared (FTIR) spectral analysis, the various functional groups present in the sample have been confirmed. The X-ray diffraction (XRD) study ensures that the grown crystal crystallizes in the orthorhombic system and the …
Published in Trends in Opto-electro & Optical Communication · Vol. 8, Issue 3, 2018 · pp. 31–36 Read article
-
Light straightening, super-collimation, strong beaming, extraordinary refraction and splitting in Photonic Crystals
Abstract: This paper reviews light straightening, super-collimation, strong beaming, extraordinary refraction and splitting in photonic crystals and stratified structures. The light straightening finds potential applications in design of optical devices. The super collimation and strong beaming can be utilized in optical integrated circuits. The extra-ordinary refraction can be utilized in sub wavelength imaging and information propagation. The splitting can be used in optical instrumentation and optical tuning. All these phenomena are …
Published in Trends in Opto-electro & Optical Communication · Vol. 12, Issue 1, 2022 · pp. 1–4 Read article
-
Gamma- and Electron Beam-Induced Crystalline modification in Poly (Lactic Acid): Effects of Radiation Dose and Dose Rate
Abstract: Poly(lactic acid) (PLA) is an important commercial biodegradable polyester whose properties are dictated by its molecular architecture and semicrystalline nature. The application of ionizing radiation particularly gamma rays and electron beams is extensive for sterilization and materials processing. The effect of ionizing radiation on the crystallinity of PLA is complex however, since irradiation causes concurrently chain scission, radical formation, oxidation, recombination and mobility driven structural reorganization. This work studies the …
Published in Journal of Polymer & Composites · Vol. 14, Issue 4, 2026 Read article
-
Recent Advances in Nanotechnology-Assisted Liquid Crystal Biosensors for Sensitive and Naked-Eye Detection of Antibiotics
Abstract: The widespread use of antibiotics in healthcare, veterinary medicine, agriculture, and aquaculture has resulted in increasing levels of antibiotic residues in food products and environmental samples, posing significant risks to human health and contributing to antimicrobial resistance. Conventional analytical methods, including high-performance liquid chromatography (HPLC), liquid chromatography–mass spectrometry (LC–MS), enzyme-linked immunosorbent assay (ELISA), and electrochemical techniques, offer excellent sensitivity but require sophisticated instrumentation, skilled personnel, and extensive sample preparation. In …
Published in International Journal of Crystalline Materials · Vol. 3, Issue 2, 2026 Read article
-
Quartz Crystal for Thin Film Thickness Measurement using Embedded Software (PSoC)
Abstract: Programmable System on Chip (PSoC) based embedded read-out design for Quartz crystal which measures thickness of a thin film during deposition has been describe in this paper. Excited quartz sensor to its resonance frequency of 5 MHz, kept nearby the substrate measures the deposited film thickness by monitoring change in quartz resonance frequency. The change in the quartz crystal resonance frequency due to deposition decreases linearly with thickness. The change …
Published in Research & Reviews: A Journal of Embedded System & Applications · Vol. 1, Issue 3, 2013 · pp. 17–23 Read article
-
Realization of Potassium Chloride Sensor Using 2D Photonic Crystal Structure
Abstract: In the present study, the concentration of potassium chloride in their aqueous solution is investigated using optical sensor. Optical sensor is realized by 2D photonic crystal structure (PCS), which is made up of silicon materials (background/substrate) consisting of 8×8 air holes containing aqueous potassium chloride solution. The principle of measurement is based on logarithmic variation of photonic band gap (PBG) with respect to different concentrations of potassium chloride. The PBG …
Published in Recent Trends in Sensor Research & Technology · Vol. 1, Issue 2, 2014 · pp. 1–6 Read article
-
Comparative Study of Commercial Crystalline Waterproofing Admixtures on the Hydration Properties of Cement Pastes
Abstract: Three different types (K, P, and X) of crystalline water proofing admixture have been chosen to study the effect on Portland cement (OPC) pastes. Several studies such as water consistency, setting time, water percolation, heat evolution, differential thermal analysis (DTA), compressive strength and expansion in corrosive atmosphere for the OPC with admixtures in it were performed. Morphology studies of OPC with the admixtures were also carried out. Results indicated better …
Published in Journal of Modern Chemistry & Chemical Technology · Vol. 2, Issue 2, 2011 · pp. 1–7 Read article
-
Optical Property of Cholesteric Liquid Crystals to Change their Color Under Temperature Change and its Practical Application
Abstract: The article presents a description of the optical property of cholesteric liquid crystals with a change of temperature to change their color, permitted author to develop a device for diagnosing breast cancer among women, which is convenient for women during diagnostics, allowing to obtain a high-quality, contrasting with high accuracy color image of benign or malignant tumors. The use of the property of cholesteric liquid crystals with temperature change to …
Published in Journal of Modern Chemistry & Chemical Technology · Vol. 12, Issue 2, 2021 · pp. 55–71 Read article
-
X-Ray Crystallography and Its Applications in Dairy Science: A Review
Abstract: X-ray crystallography (XRC) is the study of crystals using X-rays. XRC is the primary method in which detailed structure of molecules especially molecules that pertain to living systems have been visualized and discovered by exposing a well-ordered crystal of a substance to X-rays and finally generating the structural information from the spots produced on a film due to this impact. X-ray crystallography has been used for analysis of liquid milk, …
Published in Research and Reviews : Journal of Dairy Science and Technology · Vol. 2, Issue 1, 2013 · pp. 21–33 Read article
-
Asymmetrical Light Propagation in 2D Photonic Crystal Structure
Abstract: In this work, using Plane Wave Expansion (PWE) and two-dimensional Finite Difference Time Domain (2D-FDTD) methods, we design a structure that shows the high asymmetry in propagation of light. Structure is based on two-dimensional Photonic Crystal (2D-PC) consisting of square lattice (39 X 39) of infinitely long circular rods of refractive index 2.9 in the background of refractive index 1. Radius of rods is 0.15a, where a is the lattice …
Published in Journal of Polymer & Composites · Vol. 11, Issue 7, 2023 · pp. 69–74 Read article
-
Flaws and Defects in Crystals
Abstract: Crystalline materials are defined by their long-range atomic order; however, no real crystal is completely free from imperfections. This article provides a comprehensive overview of the various types of crystal defects and imperfections that occur in solid materials and their significant influence on material properties. Point defects, including vacancies, interstitials, and substitutional atoms, are examined alongside line defects such as edge and screw dislocations, as well as planar defects encompassing …
Published in International Journal of Crystalline Materials · Vol. 2, Issue 2, 2025 · pp. 1–15 Read article
-
Advanced Liquid Crystal Polymer Substrate for Flexible Antenna Design
Abstract: A type of thermoplastic polymers known as liquid crystal polymers (LCPs) is frequently used to package millimeter (mm)-wave, microwave, and radio frequency (RF) integrated circuits that operate at frequencies as high as 60GHz. LCPs are of prospective relevance as packaging material for advanced circuits at mm-wave frequencies due to their appealing electrical, thermal, and mechanical qualities and comparatively low cost. Flexible and conformal antennas are made possible by LCP's exceptional …
Published in Journal of Polymer & Composites · Vol. 14, Issue 2, 2026 · pp. 233–245 Read article
-
Morphological and Dielectric Relaxation Responses of Polymer Stabilized Ferroelectric Liquid Crystal Composite Films
Abstract: Polymer-stabilized ferroelectric liquid crystal (GH-PSFLC) composite films have been prepared by polymerization-induced phase separation (PIPS) process as a function of polymer concentration. Epoxy polymer was homogeneously dispersed into FLC host matrix to create fibril network in the composite films. Twisted fibril-like network was observed through polarizing optical microscope through transmission mode. Dielectric relaxation spectroscopy of these composites shows that real part of permittivity decreases with polymer concentration. Goldstone relaxation mode …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 2, Issue 2, 2015 · pp. 8–12 Read article
-
Bismuth's Doping Effect on Organic Non linear Optical Materials
Abstract: Using the method of slow evaporation solution growth, single crystals of pure and bismuth-doped urea were produced. Many interesting results on several properties of Bismuth fluoride impurity added to Urea single crystals have been observed and studied. The different morphology of bismuth doped urea crystals was noticed. By using FTIR analysis, the functional group's existence has been approximated. The generated crystals' lattice properties were examined using the single crystal X-ray …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 10, Issue 3, 2023 · pp. 17–24 Read article
-
Design and Analysis of Dispersion Flattened Low Loss Photonic Crystal Fiber
Abstract: AbstractThis paper demonstrates the study of triangular lattice hexagonal photonic crystal fiber with GeO2 doped core. The photonic crystal fiber (PCF) studied in this research work has a core doped with 97% molar concentrated GeO2 with seven layers of air-capillaries around the core. The design and analysis of optical characteristics, i.e., dispersion, confinement loss, and effective area have been studied extensively for optimizing the structure for a certain range of …
Published in Trends in Opto-electro & Optical Communication · Vol. 7, Issue 2, 2017 · pp. 41–50 Read article
-
Misalignment Studies in Laser Diode to Upside Down Tapered Microlens Tipped Circular Core Photonic Crystal Fiber Excitation
Abstract: By employing Gaussian field distributions for both the source and the fiber and also thealready derived ABCD matrix for upside down tapered microlens, we investigate theoreticallythe coupling optics involving a laser diode emitting practically interesting two differentwavelengths either 1.3 μm or 1.5 μm, and a series of circular core photonic crystal fibers withdifferent air filling ratio and lattice constant via upside down tapered microlens of twospecific taper lengths on the …
Published in Research & Reviews : Journal of Physics · Vol. 7, Issue 3, 2018 · pp. 85–101 Read article
-
Comprehensive Review of the Fundamental and Functional Properties of Crystalline Materials
Abstract: Crystalline materials, characterized by their highly ordered atomic arrangements, serve as the backbone of modern engineering and technology. This review provides a detailed examination of their diverse properties, categorized into mechanical, thermal, electrical, and optical domains. We analyze fundamental mechanical parameters such as the elastic modulus, yield strength, and fracture toughness, alongside functional behaviors like fatigue and creep. The discussion extends to thermal transport and expansion, electrical conductivity and resistivity, …
Published in International Journal of Crystalline Materials · Vol. 3, Issue 1, 2026 · pp. 20–24 Read article
-
Optimization of a Hybrid Core Photonic Crystal Fiber for THz Applications
Abstract: Despite several real-life applications, the development of low-loss terahertz waveguide is still a challenge for long-distance applications due to its low confinement and high propagation loss. In this paper, an octagonal waveguide structure has been optimized for minimum propagation loss in the THz frequency band. The optimized structure has a core diameter of 300 um with an operating frequency of 1.1 THz. From the optimized structure, we found optimized power …
Published in Trends in Opto-electro & Optical Communication · Vol. 9, Issue 2, 2019 · pp. 18–24 Read article
-
Application of Cholesteric Liquid Crystals in Oncology, Music Color Device and for Indication of Sorption Process
Abstract: The cholesteric liquid crystal films were used on the basis of the property of cholesteric liquid crystals under the change of the temperature to change their color, and the developed device for diagnostics of breast cancer that easy and productively permits to conduct the diagnostics with the high accuracy of colored image of benign or malignant tumor; the developed music color device, which permits to “revive” by the different colors …
Published in Research and Reviews: Journal of Oncology and Hematology · Vol. 7, Issue 3, 2018 · pp. 1–11 Read article