Article
Optics
S. S. Fouad, B. Parditka, M. Nabil, E. Baradacs, S. Negm, H. E. Atyia, Z. Erdelyi
Summary: The optical properties of ZnO/TiO2 bilayer films were studied, revealing a decrease in optical energy gap and direct optical transition with increasing bilayer numbers. A relationship between linear refractive index and optical energy gap was proposed for predicting material properties.
Article
Engineering, Electrical & Electronic
Jayanta Bauri, Ram Bilash Choudhary
Summary: Metal-free graphitic carbon nitride (gC3N4) is an emerging material with excellent electrical, optical, and thermal properties. The addition of zirconium oxide (ZrO2) semiconductor enhances the properties of gC3N4. This study synthesized gC3N4/ZrO2 nanocomposites using ultrasonic sound wave method and characterized them using various techniques. The nanocomposites exhibited desirable properties for organic light-emitting diode applications, including a bandgap energy of 2.98 eV and photon emission in the range of 450 nm-530 nm.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2023)
Article
Polymer Science
Z. A. Alrowaili, T. A. Taha, Karam S. El-Nasser, Hossam Donya
Summary: The PVA-Y2O3 nanocomposite films prepared in the study showed good structure and uniform distribution of Y2O3 nanoparticles, with optical properties changing with the increase of Y2O3 content.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2021)
Article
Environmental Sciences
Feifei Wang, Kun Zhang, Gang Sun, Qing Liu, Xuebin Li, Tao Luo
Summary: The refractive index structure constant C-n(2) near the ocean surface is analyzed along with meteorological parameters, such as temperature and wind speed. A new parameterized model is proposed based on Monin-Obukhov similarity theory, which improves upon the widely used model proposed by Wyngaard in 1973 (W73). The new model shows better correlation and less error when compared to the measured C-n(2), leading to higher accuracy in estimating turbulence parameters in different sea areas.
Article
Engineering, Electrical & Electronic
Henrique Patriota Alves, Thales Henrique Castro de Barros, Daniel L. Silva Nascimento, Marianne Stely Peixoto e Silva, Jehan Fonseca do Nascimento, Eduardo Fontana, Joaquim Ferreira Martins-Filho
Summary: This paper presents an evaluation of the influence of surface roughness on the performance of a refractive index sensor based on a D-shaped optical fiber. The manufacturing process of D-shaped sections on standard silica single-mode optical fibers with different roughness values is described. The results show that surface roughness increases device insertion loss and contributes positively to the sensitivity of the refractive index sensor. The good agreement between computational and experimental results highlights the potential application of the optical sensor in biochemical sensing.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Optics
Ashish Jain, Mitra G. Rahimian, V. R. Bhardwaj
Summary: This paper investigates the enhancement of storage capacity of optical discs by optimizing the multi-layer data recording and reading parameters. The results show that the number of layers can be tripled to 60 and the read laser power can be reduced by a factor of 7 by the 20th layer. Spherical aberrations and light-scattering have significant influence on the performance of the optical discs. The main advantage of the technique proposed in this paper is its practical implementation without the use of index-matching liquids and specialized optics.
Article
Polymer Science
Seung-Hyun Lee, Doo Hun Kim, Munju Goh, Jeung Gon Kim, Nam-Ho You
Summary: Highly refractive polymers synthesized using novel photo-curable pyrimidine-based acrylate monomers exhibit good thermal stability and high transmittance. The inclusion of ZrA nanocomposites in the polymer systems enhances refractive index, with well-dispersed particles at the nanometer level and low birefringence.
Article
Chemistry, Multidisciplinary
Junchao Jin, Po Hu, Haiyang Song, Jinhong Li, Junhui Wu, Zeyi Zeng, Qingdong Li, Li Wang, Xiao Lin, Xiaodi Tan
Summary: A high-performance holographic recording medium based on N-methylpyrrolidone (NMP) regulated PQ/PMMA has been developed by tuning the composition of the PMMA matrix. The NMP-PQ/PMMA photopolymer exhibits increased photosensitivity, diffraction efficiency, and reduced volume shrinkage, and is capable of repeatedly recording data information.
MATERIALS HORIZONS
(2023)
Article
Environmental Sciences
Gregory S. Okin
Summary: A geometric-optical model and MODIS data are used to evaluate the use of optical remote sensing imagery for estimating surface roughness. The approach of using MODIS albedo products to aid in dust emission modeling is found to be not very useful. However, suggestions are made for the proper utilization of optical data to estimate surface roughness.
REMOTE SENSING OF ENVIRONMENT
(2023)
Article
Physics, Multidisciplinary
Aditi Nain, Sanjay Dahiya, Rishi Pal Chahal, Ekta Dhanda
Summary: PVA/Ag nanocomposite with different concentrations of silver nanoparticles (Ag NPs) was successfully synthesized using the solution casting method. The effect of Ag NPs concentration and UV irradiation on the optical and structural properties of the nanocomposites was investigated. It was found that the absorption intensity increased and the optical band gap decreased with the increase in Ag NPs concentration and UV exposure time.
Article
Chemistry, Applied
Ahmed gamal El-Shamy
Summary: The paper discusses the fabrication and characterization of PVA/ZnO2 nano-composite films, focusing on their structure, optical properties, and mechanical performance. Analytical techniques such as XRD, TEM, UV-vis spectroscopy, and PL spectrophotometry were utilized to study the films. The presence of ZnO2 in the PVA matrix was found to alter the crystallinity and optical properties of the films, while the mechanical properties were also affected by the concentration of ZnO2. The nonlinear optical features of the PVA/ZnO2 nano-composite films were investigated, revealing the mechanisms of nonlinear absorption in the material.
PROGRESS IN ORGANIC COATINGS
(2021)
Article
Engineering, Electrical & Electronic
Thomas Y. Chang, Phil Steiner, Aneesh Venugopal, Jason Jury, Pin-Wei Huang, Ali Ghoreyshi, Stephanie Hernandez
Summary: Heat-assisted magnetic recording (HAMR) can achieve high areal densities by reducing switching probability distribution (SPD) through a new media design. The proposed design uses a dual-layer HAMR media architecture with net zero magnetization state grains near the transition, resulting in reduced transition noise and improved signal-to-noise ratio (SNR). Micromagnetic recording simulations confirm the effectiveness of the design in reducing transition noise and achieving a high SNR gain of 1.4 dB compared to single-layer media.
IEEE TRANSACTIONS ON MAGNETICS
(2023)
Article
Optics
Thomas E. Maybour, Devin H. Smith, Peter Horak
Summary: A theoretical model for a dynamic Moire grating capable of producing improved slow and stopped light performance was investigated. By varying coupling strength in time, the Moire grating can significantly reduce group velocity in the slow light resonance while maintaining a wide bandwidth. This dynamic Moire grating could potentially realize bandwidth modulation and be implemented using an electro-optic grating with a quasistatic electric field in a poled chi((2)) nonlinear medium.
Article
Biochemical Research Methods
Tarcisi Cantieni, Oliver Da Silva-kress, Ursula Wolf
Summary: The present study investigated the detectability limits of hypoxic regions in human muscle under different thicknesses of adipose tissue using computer simulations and experiments. The results showed that hypoxic volumes could be detected under adipose tissue thicknesses up to 1.5 cm, with a maximum tissue depth of 2.8 cm and a minimum detectable hypoxic volume of 1.2 cm3.
BIOMEDICAL OPTICS EXPRESS
(2022)
Article
Materials Science, Multidisciplinary
K. M. Mustafizur Rahman, M. Shah Alam, Rajib Ahmed, M. Asiful Islam
Summary: A highly sensitive hexagonal photonic crystal fiber (PCF) based surface plasmon resonance (SPR) refractive index (RI) sensor is proposed, with optimized design structure and parameters for optimal performance in various refractive index ranges.
RESULTS IN PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Yanbin Wang, Xinyou Huang, Ziqiu Cheng, Penghui Chen, Yuyang Chen, Junhao Ye, Haohong Chen, Zhenzhen Zhou, Denis Yu Kosyanov, Jiang Li
Summary: Uniform Al2O3-Ce:LuAG composite phosphor ceramics (CPCs) with excellent luminescent properties and thermal stability have been successfully synthesized in this study, showing great potential for application in solid-state laser lighting.
Article
Materials Science, Multidisciplinary
Syed Muhammad Ali Zaidi, Mazhar Ali Kalyar, Zulfiqar Ali Raza, Aayesha Shoukat, Rubaila Waseem, Muhammad Aslam
Summary: Polyvinyl alcohol (PVA) nanocomposite strips embedded with graphene nanosheets and copper-ferrite nanoparticles were synthesized using solution casting technique. Laser pulse irradiations were then applied to modify the structural, optical, and electrical properties of the strips, showing potential for optoelectronic devices.
Article
Materials Science, Multidisciplinary
Yunru Chen, Jialing Wu, Jiajia Wang, Shihui Ma, Hongwei Yu
Summary: This paper investigates the angular non-critical phase-matching second-harmonic-generation properties of Ba3(ZnB5O10)PO4 crystal and explores its potential applications in the output spectral regions.
Article
Materials Science, Multidisciplinary
Qun Jing, Menglin Zhu, Lu Li, Xu Ji, Haiming Duan, Henglei Chen, Ming-Hsien Lee
Summary: The paper introduces two new nonlinear optical materials, MZnPO4 (M = Rb, Cs), synthesized by cation substitution. These materials exhibit a honeycomb-like structure and show mild SHG responses with short absorption edges. The thermal properties, IR spectra, and theoretical calculations of the materials are also discussed.
Article
Materials Science, Multidisciplinary
Camila Ianhez-Pereira, Akhil Kuriakose, Ariano De Giovanni Rodrigues, Ana Luiza Costa Silva, Ottavia Jedrkiewicz, Monica Bollani, Marcio Peron Franco de Godoy
Summary: This study aims to evaluate the crystalline changes induced by ultrafast laser micromachining on manganese oxide thin films using micro-Raman spectroscopy. The results show that laser-writing is effective in locally modifying low-crystallinity films and increasing crystallite sizes, highlighting an interesting approach to evaluate laser-induced structural modifications on metal oxide thin films.
Article
Materials Science, Multidisciplinary
Kamal Bansal, Neeraj Kumar Mishra, Ibrahim Abdullahi, Param Jeet Singh, Mohit Tyagi, Sukhpal Singh
Summary: A novel Sm3+ activated oxyfluoride glass was synthesized and its structure and properties were analyzed. The glass showed potential applications in lasers, optical temperature sensing, and high-energy scintillators.
Article
Materials Science, Multidisciplinary
Xingjian Wang, Zhixu Wu, Jiawei Zhu, Yubin Kang, Mengqiang Cai, Yong Xia, Hui Deng
Summary: Antimony sulfide (Sb2S3) has been investigated as a promising material for visible light photodetectors due to its non-toxicity, stability, and high absorption coefficient. In this study, we systematically explored the impact of key parameters on the performance of Sb2S3 devices using simulation and successfully fabricated self-powered photodetectors with high responsivity and specific detectivity. Furthermore, we demonstrated the application of the Sb2S3 detector in a scanning imaging system, showcasing its potential for developing new types of visible light detectors and imaging systems.
Article
Materials Science, Multidisciplinary
O. I. Sallam, R. M. Ahmed
Summary: The 20NaF-60P2O5-20Na2O fluorophosphate glass systems doped with 3 wt% of CoO and NiO were investigated for their optical parameters before and after gamma irradiation. The presence of defects within the glass network and the addition of transition metals were found to affect the properties of the composites. After irradiation, a red shift was observed in the dissipation factor spectrum. The energy lost at the surface of the composites was larger than the energy lost within the constituent materials. All investigated composites showed insulating behavior and exhibited increased nonlinear optical parameters after irradiation, with the CoO-doped composite showing the highest values.
Article
Materials Science, Multidisciplinary
Fahimeh Ahmadi, Zeinab Ebrahimpour, Asghar Asgari, Bao Van
Summary: In this study, Er3+-doped sulfophosphate glasses containing titanium nanoparticles (TiO2 NPs) and different concentrations of silver nanoparticles (AgNPs) were synthesized. The impact of AgNPs on the physical and structural characteristics, optical absorption and emission features, and photocatalytic activity of the glasses were investigated. The results showed that the addition of AgNPs enhanced the emission intensity of the glasses, with the system containing 0.04 mol% of AgNPs exhibiting optimal performance. Furthermore, the presence of AgNPs and TiO2 NPs in the glass matrix positively affected the photocatalytic performance.
Article
Materials Science, Multidisciplinary
Zhuang Li, Rongfei Huang, Wei Yuan, Shaoqiang Zheng, Wenlu Liao, Huiying Xu, Zhiping Cai
Summary: This study reports the first realization of an 868 nm Pr:YLF laser pumped by an InGaN blue laser diode. The laser achieved a maximum power of 641 mW with stable output and good beam quality. The experimental results were in agreement with theoretical simulations.
Article
Materials Science, Multidisciplinary
Bhishma Karki, Youssef Trabelsi, Amrindra Pal, Sofyan A. Taya, Ram Bharos Yadav
Summary: This study proposes an SF11 Prism- Ag- ZnO nanowires-CeO2-Sensing layer-based surface plasmon resonance sensor for measuring dopamine concentration in human blood. The sensor demonstrates high sensitivity and detection accuracy, and holds significant importance for early diagnosis of neurological diseases.
Article
Materials Science, Multidisciplinary
M. Taoufiq, A. Soussi, A. Elfanaoui, A. Ait Hssi, S. Baoubih, A. Ihlal, K. Bouabid
Summary: In this study, the effect of copper doping within ZnS on glass substrates was investigated through experimental and theoretical approaches. Pure ZnS and Cu-doped ZnS films with varying copper concentrations were deposited on glass substrates using the SILAR technique. The structural, morphological, and optical properties of the films were characterized, and the theoretical FP-LAPW method based on density functional theory was employed to study the properties of copper-doped ZnS.