Article
Optics
Alexander Machikhin, Alexey Gorevoy, Vladislav Batshev, Vitold Pozhar
Summary: Acousto-optic anisotropic interaction in uniaxial birefringent crystals offers a versatile and widespread approach to tunable spectral filtration of light, with the limitation of spectral and angular bandwidths. Overcoming these constraints can be achieved by simultaneous Bragg diffraction of multiple light beams. This paper discusses and compares four available modes of anisotropic wide-aperture AO interactions in uniaxial birefringent crystals, providing important insights for the development of AO imaging devices, particularly multi-channel AO tunable filters.
Article
Optics
Brian G. Hoover, Jonathan H. Turner, Cesar H. Ornelas-Rascon
Summary: In this study, the polarized reflectivity of ideally smooth metals with a uniaxial anisotropic complex refractive index is derived and applied to imaging the orientation of metals. By comparing orientation images obtained through a polarized-light microscope with those obtained through electron backscatter diffraction, the accuracy of c axis orientation images of several titanium alloys is verified to be better than 11%.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION
(2021)
Article
Materials Science, Multidisciplinary
S. Nakata, P. Yang, M. E. Barber, K. Ishida, H. -H. Kim, T. Loew, M. Le Tacon, A. P. Mackenzie, M. Minola, C. W. Hicks, B. Keimer
Summary: In order to lay the foundation for theoretical models of high-temperature superconductivity, researchers have conducted experimental studies to establish a correspondence between macroscopic transport coefficients and atomic-scale correlation functions. However, the gradual onset of electronic ordering phenomena and the corresponding transport anomalies has made this research avenue difficult. By measuring the uniaxial-stress dependence of the normal-state resistivity and Hall coefficient of the underdoped high-temperature superconductor YBa2Cu3O6.67, the researchers observed a remarkable correspondence between the differential stress responses of the transport coefficients and resonant X-ray diffraction features indicative of charge ordering. However, they found that static charge order is not responsible for a sign reversal of the Hall coefficient, suggesting that the interplay with liquid-like, dynamical charge correlations is essential for the transport anomalies in the underdoped cuprates.
NPJ QUANTUM MATERIALS
(2022)
Article
Multidisciplinary Sciences
Meng Xu, Qiang Li, Yuzhu Song, Yuanji Xu, Andrea Sanson, Naike Shi, Na Wang, Qiang Sun, Changtian Wang, Xin Chen, Yongqiang Qiao, Feixiang Long, Hui Liu, Qiang Zhang, Alessandro Venier, Yang Ren, Francesco d'Acapito, Luca Olivi, Danilo Oliveira De Souza, Xianran Xing, Jun Chen
Summary: In this study, a metallic framework-like material FeZr2 is found to exhibit a giant uniaxial (1D) negative thermal expansion (NTE) with a wide temperature range. The origin of the giant NTE is attributed to the coupling with phonons, flexible framework-like structure, and soft bonds. This finding is significant in understanding the nature of thermal expansion and guiding the regulation of thermal expansion.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
L. L. Lage, A. Latge
Summary: This study investigates the electronic properties of Sierpinski triangle flakes and simulated experimental synthesized fractal nanostructures, revealing the self-similarity of energy states and examining the transport responses of quasi-1D molecular chains. The findings provide insight into the synthesis of new molecular chains and shed light on the emergence of flat bands in condensed matter systems.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Polymer Science
J. F. Gargiuli, G. Quino, R. Board, J. C. Griffith, M. S. P. Shaffer, R. S. Trask, I. Hamerton
Summary: Four commercial high-performance aerospace aromatic epoxy matrices were evaluated in terms of their mechanical and thermal properties. The results showed that the thermoplastic toughened formulation exhibited improved overall stress values, while the particle-toughened sample displayed decreased stress values past the yield point. The resin with combined toughening agents performed similarly to the baseline material. Additionally, the dilation angles during plastic deformation were close to 0 degrees. The compressive modulus of the fully formulated resins was higher than that of the model resins, although it came at the expense of yield stress.
Article
Physics, Multidisciplinary
Qi Zheng, Chen-Yue Hao, Xiao-Feng Zhou, Ya-Xin Zhao, Jia-Qi He, Lin He
Summary: In small-angle twisted bilayer graphene, the formation of localized pseudo-Landau levels (PLLs) is suppressed by interfacial structural reconstruction, but PLLs are found to be quite robust in graphene near the magic angle, where sample-wide electronic kagome lattices with tunable lattice constants can be directly observed using a scanning tunneling microscope.
PHYSICAL REVIEW LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Xiao Wang, Bing Liu
Summary: We present a unique method to synthesize patchy nanoparticles by controlling the orientation of the molecules through synchronous polymerization and crystallization. The resulting nanoparticles have uniform shapes and a single liquid crystal domain. The patchy properties can be activated or deactivated by solvents, and additional colloidal blocks can be added to create triblock patchy dumbbells with integrated optical properties. These nanoparticles demonstrate triple-mode optical authentication and can be used in anti-counterfeiting labels or patterns. Furthermore, the patchy cylinders can serve as building blocks for long liquid crystal rods or porous colloidal materials.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Review
Optics
Hai Yu
Summary: This paper introduces an angular displacement measurement technology based on in-line digital holographic reconstruction, achieving high measurement resolution by reconstructing the optical information of calibrated gratings in a small volume.
OPTICS AND LASERS IN ENGINEERING
(2021)
Article
Engineering, Electrical & Electronic
Zi-Kang Chen, Li Zhang, Zibin Weng, Rui-Yang Li
Summary: This letter presents a wideband wide-beam rectangular di-electric resonator antenna (DRA) using uniaxial anisotropic material for the first time. By tuning the uniaxial permittivity tensor, the radiation from the top wall of the DRA is enhanced and the gain at low elevation angle in the E-plane is improved. The bandwidth is broadened by merging the feed slot mode and the fundamental TE(111)(y) mode. The addition of a grounded substrate and trapezoidal notches on the ground broadens the half-power beamwidth (HPBW) in the H-plane. The measured results show an impedance bandwidth of 35.7% over a band of 2.65-3.8 GHz with HPBWs of at least 250 degrees and 162 degrees in the E-and H-planes, respectively.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Roman Forker, Torsten Fritz
Summary: This article critically examines the assignment method of epitaxy types proposed by Wang et al., and identifies systematic errors in their strain calculations for C60 monolayers.
Article
Oncology
Mitzi M. van Andel, Maarten Groenink, Maarten P. van den Berg, Janneke Timmermans, Arthur J. H. A. Scholte, Barbara J. M. Mulder, Aeilko H. Zwinderman, Vivian de Waard
Summary: The epigenome-wide association study (EWAS) in patients with Marfan syndrome (MFS) has identified methylation loci significantly associated with aortic diameters, aortic dilatation rate, and aortic events. These findings contribute to the growing literature on gene expression regulation in MFS patients.
CLINICAL EPIGENETICS
(2021)
Article
Multidisciplinary Sciences
Benjamin J. E. Martin, Julie Brind'Amour, Anastasia Kuzmin, Kristoffer N. Jensen, Zhen Cheng Liu, Matthew Lorincz, LeAnn J. Howe
Summary: Histone acetylation, a common feature of transcription, is largely dependent on transcription due to the recruitment and activity of histone acetyltransferases by RNA polymerase II. Promoter-bound HATs are unable to acetylate histones without active transcription, indicating that HAT activity is regulated post-recruitment.
NATURE COMMUNICATIONS
(2021)
Article
Metallurgy & Metallurgical Engineering
Xue-feng Si, Lin-qi Huang, Xi-bing LI, Feng-qiang Gong, Xi-ling Liu
Summary: The influence of bedding angle beta on the mechanical properties and rockburst proneness of rocks was investigated through uniaxial compression tests. The results showed that as beta increased, there were changes in peak stress, peak strain, cumulative acoustic emission counts, and potential energy of the elastic strain. The failure mode evolved from tensile splitting along the bedding plane to shear slip along the weak bedding plane, and ultimately to tensile splitting across the bedding plane. Additionally, rockburst proneness varied with different values of beta, with different types of rockbursts occurring.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2021)
Article
Multidisciplinary Sciences
Qing Zhang, Qingdong Ou, Guangyuan Si, Guangwei Hu, Shaohua Dong, Yang Chen, Jincheng Ni, Chen Zhao, Michael S. Fuhrer, Yuanjie Yang, Andrea Alu, Rainer Hillenbrand, Cheng-Wei Qiu
Summary: Recent research has shown that highly asymmetric and unidirectional phonon polaritons can be excited by directly patterning high-symmetry crystal structures. Structural engineering in high-symmetry vdW materials allows versatile and robust control over the propagation of phonon polaritons, opening up new possibilities for controlling infrared polaritons.
Article
Optics
F. E. Veiras, L. M. Riobo, C. L. Matteo, L. I. Perez, M. T. Garea
Article
Optics
Arturo Bianchetti, Francisco E. Veiras, Pablo Etchepareborda, Ana Laura Vadnjal, Alejandro Federico, Guillermo H. Kaufmann
Article
Chemistry, Multidisciplinary
A. J. Conde, A. Bianchetti, F. E. Veiras, A. Federico, J. M. Cabaleiro, M. Dufva, R. E. Madrid, L. Fraigi
Article
Optics
Francisco E. Veiras, Ana Laura Vadnjal, Pablo Etchepareborda, Arturo Bianchetti, Alejandro Federico, Guillermo H. Kaufmann
OPTICAL ENGINEERING
(2016)
Article
Optics
Ana Laura Vadnjal, Pablo Etchepareborda, Arturo Bianchetti, Francisco E. Veiras, Alejandro Federico, Guillermo H. Kaufmann
OPTICS AND LASERS IN ENGINEERING
(2016)
Article
Instruments & Instrumentation
F. E. Veiras, M. T. Garea, L. I. Perez
REVIEW OF SCIENTIFIC INSTRUMENTS
(2016)
Article
Engineering, Electrical & Electronic
Lucas M. Riobo, Francisco E. Veiras, Maria T. Garea, Patricio A. Sorichetti
IEEE SENSORS JOURNAL
(2018)
Article
Instruments & Instrumentation
F. E. Veiras, G. Raffa, D. Care, L. I. Perez, M. T. Garea
REVIEW OF SCIENTIFIC INSTRUMENTS
(2014)
Article
Optics
Ricardo David Araguillin, Ligia Ciocci Brazzano, Liliana Ines Perez, Francisco E. Veiras
Summary: Surface plasmon resonance sensors are suitable for detecting narrow acoustic pulses, with the Kretschmann configuration being optimal. Optimization of metallic film thicknesses and angles of incidence can be achieved through numerical simulations to enhance system performance.
JOURNAL OF MODERN OPTICS
(2021)
Article
Instruments & Instrumentation
K. Hass, R. M. Insabella, M. G. Gonzalez, L. Riobo, F. E. Veiras
Summary: The method utilizes a broad-spectrum point source generated by a laser-induced bubble and a calibrated transducer to calibrate ultrasonic sensors for optoacoustics, ensuring both frequency response and sensitivity are taken into account.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2021)
Article
Engineering, Multidisciplinary
Mauro Vidotto, Francisco E. Veiras, Patricio A. Sorichetti
Summary: This paper describes a portable vector network analyzer operating from 30 MHz to 850 MHz, using a commercial low-cost software defined radio. It can be used for transmission and reflection measurements, with automatic analysis and systematic error correction.
Article
Instruments & Instrumentation
Patricia M. E. Vazquez, Francisco E. Veiras, Ligia Ciocci Brazzano, Patricio A. Sorichetti
Summary: Designing detection systems based on transimpedance amplifiers is a complex task due to the coupled constraints of noise, frequency response, and stability. This work presents a straightforward design method that considers the objectives, scope, requirements, and specifications, including input signal levels. By analyzing noise and stability using a small-signal model, a systematic procedure is presented to search for acceptable values of feedback network components, with a merit function defined to compare performance of acceptable combinations.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2021)
Article
Optics
Pablo Etchepareborda, Arturo Bianchetti, Francisco E. Veiras, Ana Laura Vadnjal, Alejandro Federico, Guillermo H. Kaufmann
Proceedings Paper
Optics
M. T. Garea, M. C. Duplaa, F. E. Veiras, L. I. Perez, C. L. Matteo, P. A. Sorichetti
23RD CONGRESS OF THE INTERNATIONAL COMMISSION FOR OPTICS (ICO 23)
(2015)
