Article
Optics
Yunyun Lai, Wenxiu Dong, Jin Hu
Summary: A flexible vortex beam generator based on transformation optics is proposed to convert input plane waves to various output vortex beams. The methodology involves a geometrical approach that redistributes the phase or polarization structures in a disc to a belt using topological equivalence. Different vortex beams can be generated by configuring the incidence angles and polarization directions. Numerical simulations are conducted to verify the feasibility, and the proposed design shows potential for extensive applications.
Article
Materials Science, Multidisciplinary
Hyeonil Kim, Hyeonuk Yeo, Heung Cho Ko, Nam-Ho You
Summary: A series of aromatic polybenzoxazoles (PBOs) containing sulfur atoms in their main chains have been developed, showing high thermal stability and decomposition temperature. One of the PBOs exhibits an extremely high refractive index due to its high sulfur content.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Optics
Xian Zhang, Yangyang Xu, Xiao-Song Zhu, Yi-Wei Shi
Summary: A dielectric/Ag-coated hollow fiber (HF) temperature sensor based on long-range surface plasmon resonance (LRSPR) is proposed and experimentally demonstrated. The sensor achieves a temperature sensitivity of 3.6 to 20.5 nm/℃, which is one of the highest reported among optical fiber temperature sensors. The detection range of the sensor can be easily tuned up to 170℃, offering an outstanding advantage compared to temperature sensors using polydimethylsiloxane.
Article
Chemistry, Analytical
Ting-Yuan Lin, Chih-Yang Wu
Summary: A microchannel design is proposed in this study to improve the performance of an optofluidic beam splitter by controlling the height and refractive index gradient of the fluid inlets, resulting in the splitting of incident light into two beams to enhance transmission efficiency. Experimental results demonstrate the device's good performance, with the validity of numerical simulation confirmed.
Article
Physics, Condensed Matter
Kamal Aly
Summary: This passage discusses two forms of equations that are commonly used but incorrect. The correct forms have been derived and validated, aligning with the information found in textbooks and literature.
PHYSICA B-CONDENSED MATTER
(2023)
Review
Chemistry, Analytical
Rowan Morris, Cliff Jones, Mamatha Nagaraj
Summary: Liquid crystals are valuable materials for applications in beam steering devices, specifically in the field of adaptive optics. This paper provides an overview of the properties of liquid crystals that make them useful in this field, as well as a detailed discussion of specific liquid crystal devices that act as switchable optical components. The relative advantages and disadvantages of different devices and techniques are summarised.
Article
Mathematics, Applied
Zejia Lin, You Wu, Huixin Qiu, Xinming Fu, Kaihui Chen, Dongmei Deng
Summary: An analytical expression of the second order chirped Pearcey Gaussian vortex beam in a medium with a parabolic refractive index was derived in this study. The CPGVB exhibits periodic automatic Fourier transform at specific positions and can generate off-axis autofocusing position without changing the laser incident angle. Investigation of the radiation forces of the CPGVB revealed trapping positions in the beam-propagation direction.
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
(2021)
Article
Materials Science, Paper & Wood
Andreea Irina Barzic, Marius Soroceanu, Razvan Rotaru, Florica Doroftei, Mihai Asandulesa, Codrin Tugui, Ioan Andrei Dascalu, Valeria Harabagiu
Summary: This study investigates hydroxypropyl cellulose/barium titanate composites for electric energy storage applications. The results show that the incorporation of barium titanate particles improves the structural, optical, mechanical, and dielectric properties of the films.
Article
Computer Science, Information Systems
Bashar A. F. Esmail, Slawomir Koziel, Lukasz Golunski, Huda Bin A. Majid, Rusan Kumar Barik
Summary: This review study introduces the concept and applications of metamaterials, focusing on their electromagnetic properties and design approaches. It also provides a detailed study on using metamaterials to control radiation and achieve beam deflection in antennas.
Article
Optics
Hiroshi Ohno, Takashi Usui
Summary: Unsupervised neural network ray tracing (NNRT) is proposed to calculate light ray paths connecting given points in a gradient-index medium. Using Maxwell's fisheye lens as an example, NNRT is shown to accurately trace ideal light ray paths passing through given points.
Article
Chemistry, Multidisciplinary
Avinash Kumar Rella, Subhangi Subedi, Le Gia Trung, Vineet Kumar, Suhyun Kim, Shin-Woong Kang
Summary: Photonic crystals have great importance in technology, especially in optics and photonics. The authors report on refractive index adaptive photonic crystals, where the structural color responds to chemicals by changing the reflective color. Loading various chemicals into nanopores significantly shifts the structural color based on the chemical's refractive index. This sensing mechanism offers advantages such as durability, sensitivity, fast response, and wide detection range.
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
Physics, Condensed Matter
Faheem Ullah, Feroz A. Mir, Fayaz A. Najar
Summary: Ceramic LaFeO3 (LFO) nanoparticles were synthesized using the solid state reaction method, and PVA and LFO-PVA nanocomposite films were prepared. The optical properties of these films were studied using UV-visible spectroscopy, revealing that increasing LFO doping concentration decreases the energy band gap while increasing the Urbach energy. Refractive index, extinction coefficient, and other optical parameters were obtained from transmittance and reflectance data.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Materials Science, Multidisciplinary
Maria Matiatou, Panagiotis Giannios, Spyridon Koutsoumpos, Konstantinos G. Toutouzas, George C. Zografos, Konstantinos Moutzouris
Summary: The experimental determination of refractive index for eleven different human tissue types using a prism-coupling refractometer and a simple Cauchy model is reported in this study. The model accurately reproduces the experimental data and enables prediction of tissue refractive index in the entire visible and near-infrared spectral range, as well as estimation of dispersion-related parameters like group velocity dispersion.
RESULTS IN PHYSICS
(2021)
Article
Materials Science, Composites
Yishan Yang, Yukang Lai, Song Zhao, Hongguang Chen, Renshu Li, Yongjiang Wang
Summary: This study reports the synthesis of a new transparent fiber reinforced polymer material (tGFRP) with high transparency and superior mechanical properties by controlling the refractive index of epoxy resin and using a novel processing technique.
COMPOSITES SCIENCE AND TECHNOLOGY
(2024)
Article
Instruments & Instrumentation
Xiaobin Shang, Dieter Cuypers, Fang Chen, Chaowei Xu, Quan Li, Chao Wu, Hongqiang Li, Changjun Jiang, Herbert De Smet
SMART MATERIALS AND STRUCTURES
(2019)
Article
Engineering, Electrical & Electronic
Rik Verplancke, Maarten Cauwe, David Schaubroeck, Dieter Cuypers, Bjorn Vandecasteele, Lothar Mader, Celine Vanhaverbeke, Marco Ballini, John O'Callaghan, Erkuden Goikoetxea, Dries Braeken, Aritra Kundu, Erin Patrick, Nima Maghari, Kevin Otto, Rizwan Bashirullah, Maaike Op de Beeck
JOURNAL OF MICROMECHANICS AND MICROENGINEERING
(2020)
Article
Optics
Marie-Aline Mattelin, Ana Radosavljevic, Jeroen Missinne, Dieter Cuypers, Geert Van Steenberge
Article
Chemistry, Analytical
Matthew Donora, Andres Vasquez Quintero, Herbert De Smet, Ian Underwood
SENSORS AND ACTUATORS B-CHEMICAL
(2020)
Article
Polymer Science
Laura Astoreca, Pieter Cools, David Schaubroeck, Mahtab Asadian, Sheida Aliakbarshirazi, Heidi Declercq, Maaike Op de Beeck, Rino Morent, Herbert De Smet, Nathalie De Geyter
Article
Multidisciplinary Sciences
Andres Vasquez Quintero, Pablo Perez-Merino, Herbert De Smet
SCIENTIFIC REPORTS
(2020)
Editorial Material
Engineering, Electrical & Electronic
Jiun-Haw Lee, Herbert De Smet, Briana Gilmartin, Ian Underwood
JOURNAL OF THE SOCIETY FOR INFORMATION DISPLAY
(2021)
Article
Optics
Nick Rondelez, Antonio Correia, Wouter Ryckaert, Herbert De Smet, Dieter Cuypers, Youri Meuret
Summary: This paper investigates both reflective and transmissive configurations for laser-driven high-luminance white light sources. It demonstrates that using a sapphire half-ball lens as the output optic in a transmissive configuration can significantly enhance efficiency and potential light output.
Article
Materials Science, Multidisciplinary
Laura Astoreca, David Schaubroeck, Parinaz Saadat Esbah Tabaei, Rouba Ghobeira, Maaike Op de Beeck, Rino Morent, Herbert De Smet, Nathalie De Geyter
Summary: A visual study of ALD nucleation on polymers was conducted, revealing the nucleation process of Al2O3 and HfO2 on polyimide through mask etching and secondary electron microscopy analysis. It was found that both materials followed an island-coalescence nucleation process, with plasma-activating polyimide providing additional surface reactive sites for the ALD precursors to adsorb.
Proceedings Paper
Engineering, Electrical & Electronic
Xiaobing Shang, Fang Chen, Zihao Chen, Herbert De Smet, Hongqiang Li, Changjun Jiang
2020 45TH INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER, AND TERAHERTZ WAVES (IRMMW-THZ)
(2020)
Review
Crystallography
Xiaobing Shang, Dieter Cuypers, Tigran Baghdasaryan, Michael Vervaeke, Hugo Thienpont, Jeroen Beeckman, Kristiaan Neyts, Quan Li, Chao Wu, Hongqiang Li, Changjun Jiang, Herbert De Smet
Article
Materials Science, Multidisciplinary
Andres Vasquez Quintero, Ritsuko Arai, Yoshiko Yamazaki, Takao Sato, Herbert De Smet
ADVANCED MATERIALS TECHNOLOGIES
(2020)
Proceedings Paper
Engineering, Electrical & Electronic
Marie-Aline Mattelin, Ana Radosavljevic, Jeroen Missinne, Dieter Cuypers, Sander Kommeren, Jos Vandael, Jan Matthijs ter Meulen, Luc Verduyckt, Geert Van Steenberge
ADVANCED FABRICATION TECHNOLOGIES FOR MICRO/NANO OPTICS AND PHOTONICS XIII
(2020)
