Review
Crystallography
John W. Goodby, Stephen J. Cowling
Summary: In the 1960s, the invention of integrated circuits brought about a global revolution in electronic devices. The introduction of chips led to a need for advancements in visual communication displays, affecting everyday applications such as watches, computer monitors, TVs, and phones. The discovery and application of liquid crystals, combined with the use of low voltage fields, allowed for the driving of images. In the UK, a collaboration between government research facilities, electronic companies, and a small university formed a consortium that laid the groundwork for new technologies.
Article
Chemistry, Multidisciplinary
Chenguang Zhang, Wenliang Wang, Xiaodong Hao, Yong Peng, Yulin Zheng, Jia Liu, Yiyuan Kang, Fujian Zhao, Zhengtang Luo, Junjie Guo, Bingshe Xu, Longquan Shao, Guoqiang Li
Summary: This study utilized GaN/AlGaN materials with controlled polarity to induce endogenous electrical stimulation for bone regeneration, finding that Ga-polarity GaN/AlGaN nanofilms showed superior bone repair in vivo and promoted osteogenic differentiation of bone mesenchymal stem cells in vitro. Additionally, the study revealed that bone morphogenetic protein-6 (BMP6) may be an electrically sensitive osteogenic protein.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Ali Ahmed Salem, Rahisham Abd-rahman, Zulkurnain Abdul-Malek, Kwan Yiew Lau, Nur Ashida Salim
Summary: This study reports on the effectiveness of using non-linear field grading materials based on ZnO microvaristors to control electric stress on high-voltage insulators and improve their performance.
Article
Materials Science, Multidisciplinary
S. Pashalou, H. Goudarzi, M. Khezerlou, S. A. Jafari
Summary: The study reveals that the interaction between optical pulse and Higgs mode oscillations in superconductors affects electron dynamics, leading to irreversible transitions between valence and conduction bands in graphene. The presence of superconductivity significantly influences the redistribution of conduction band electrons and hot spots in the Dirac points of graphene, with the number of hot spots depending on pulse intensity.
Article
Multidisciplinary Sciences
Michael Diez, Henning Kirchberg, Andreas Galler, Sebastian Schulz, Mykola Biednov, Christina Boemer, Tae-Kyu Choi, Angel Rodriguez-Fernandez, Wojciech Gawelda, Dmitry Khakhulin, Katharina Kubicek, Frederico Lima, Florian Otte, Peter Zalden, Ryan Coffee, Michael Thorwart, Christian Bressler
Summary: X-ray free-electron laser sources are used to study X-ray with high temporal resolution. However, new high repetition rate X-ray facilities pose challenges for timing tools. In this study, a sensitive timing tool scheme is demonstrated to enhance time resolution in pump-probe experiments at very high pulse repetition rates. The scheme uses a self-referenced detection scheme with a time-sheared chirped optical pulse and an X-ray stimulated diamond plate.
NATURE COMMUNICATIONS
(2023)
Article
Mechanics
Zhe Feng, Mengqi Zhang, Pedro A. Vazquez, Chang Shu
Summary: Investigating deterministic and stochastic bifurcations in electroconvective flows, we found a discrepancy in linear instability criteria between experiment and theory, possibly due to the inhomogeneity in ion-exchange membranes used in experiments. Deterministic bifurcation analysis revealed the high dimensionality of chaos in the flow, while stochastic bifurcation analyses showed that the linear instability criteria under stochastic boundaries are closer to experimental values, confirming the hypothesis.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Materials Science, Ceramics
Yuze Xue, Mingwei Zhang, Le Xin, Luchao Ren, Panpan Lv, Hang Zhan, Jing He, Jiwei Zhai
Summary: 0.2ZnAl(2)O(4)/0.8Ba(0.5)Sr(0.5)TiO(3) ceramics with good dielectric temperature stability were synthesized by controlling sintering behavior. The relationship between sintering conditions, microstructure, and dielectric properties of ceramics was studied. The double sintering (DS) behavior improved the density and resulted in superior dielectric permittivity and low leakage current compared to single sintering ceramics. The temperature stability of DS ceramics was optimal due to high surface energy at grain boundaries and improved density, providing a route for producing ceramics with weak temperature sensitivity for microwave applications.
JOURNAL OF CERAMIC PROCESSING RESEARCH
(2023)
Article
Optics
Dongzi Zhao, Jing-Zheng Huang, Tailong Xiao, Hongjing Li, Xiaoyan Wu, Guihua Zeng
Summary: In this work, a new type of non-reciprocity in an optical fiber Sagnac interferometer is studied, considering the polarization-dependent loss. This non-reciprocity, originating from the geometric phases induced by continuous weak measurement, is different from the physical effects considered in previous studies. It exhibits a unique phenomenon of sudden phase transition, which may open up new possibilities for designing high precision optical fiber sensors.
Article
Optics
Youyou Hu, Zhiyuan Ma, Weiqian Zhao, Jiang Zhao, Jun Liu, Qingli Jing, Jiantai Dou, Bo Li
Summary: In this work, a ring Q-switched Ytterbium-doped fiber laser capable of generating mode-switchable nanosecond pulsed vector vortex beams between two different orders is reported and demonstrated. By using multiple cascaded Q-plates and adjusting the polarization state in the cavity, control generation of vector vortex beams of different orders is achieved. Experimental results show that the fiber laser can generate vortex beams, cylindrical vector beams, and elliptically polarized cylindrical vector beams of different orders.
Article
Optics
Xinyu Miao, Jun Ma, Cong Wei, Nianfeng Wang, Hui Ding, Rihong Zhu, Caojin Yuan
Summary: This article presents a new interferometric method to determine and correct the birefringence effects in the measurements of large optics. The method utilizes the measurement of transmitted wavefronts and independent measurements with orthogonal polarization states to correct the polarization aberrations.
Article
Chemistry, Physical
Norbert Tarjanyi, Marek Vevericik, Daniel Kacik, Milan Timko, Peter Kopcansky
Summary: This study investigates the dispersion dependence of group and phase birefringence of a pure 6CHBT liquid crystal sample at a constant temperature. The inner surfaces of the cell containing the liquid crystal sample were treated to have molecules aligned parallel to the cell's surfaces. The dispersion dependencies of group and phase birefringence were analyzed based on the measured spectra.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Inorganic & Nuclear
Junben Huang, Jianian Cheng, Bing-Hua Lei, Zhonglei Wei, Shilie Pan, Zhihua Yang
Summary: This study introduces multiple functional chromophores and uses a high-throughput screening method to discover chalcohalides Hg(3)AsQ(4)X with extremely large birefringence, two times that of commercial birefringent crystals. Novel birefringent material motifs activated by the synergism of various factors were also identified.
INORGANIC CHEMISTRY FRONTIERS
(2021)
Article
Optics
Katharina Goth, Michael Griesbeck, Madeleine Eitner, Hendrik Buker, Marc Eichhorn, Christelle Kieleck
Summary: This paper presents a continuous-wave crossed-Porro prism Ho3+:YAG laser and compares it with a corresponding mirror resonator. The crossed-Porro prism resonator shows higher output power and slope efficiency, as well as better beam quality compared to the mirror resonator. Moreover, it has superior alignment sensitivity due to the retro-reflective nature of the prisms.
Article
Physics, Applied
Shi-qian Zhang, Jie-ying Ma, Yong Zhang, Ling-bao Kong, Cheng-ping Huang
Summary: This paper proposes a compact and tunable polarization interference system working in the microwave band, employing artificially structured planar materials, and achieves linear modulation of transmission intensity by adjusting the position of one metal screen.
PHYSICAL REVIEW APPLIED
(2021)
Article
Optics
Penghui Yao, X. Steve Yao, Xiaojun Chen, Hao Xiao, Jianguang LI
Summary: The relative error of a fiber optic current sensor (FOCS) increases quadratically with the electric current to be measured, mainly due to the residual linear birefringence of the spun fiber used in the FOCS. However, by measuring the residual linear birefringence and circular birefringence of the spun fiber, the FOCS' relative error can be significantly reduced, improving its accuracy.
Article
Optics
Lin Xu, Tomas Tyc, Huanyang Chen
Article
Optics
Lin Xu, Xiangyang Wang, Tomas Tyc, Chong Sheng, Shining Zhu, Hui Liu, Huanyang Chen
PHOTONICS RESEARCH
(2019)
Article
Optics
Jakub Belin, Tomas Tyc, Mateusz Grunwald, Stephen Oxburgh, Euan N. Cowie, Chris D. White, Johannes Courtial
Article
Multidisciplinary Sciences
Hossein Eskandari, Tomas Tyc
SCIENTIFIC REPORTS
(2019)
Article
Optics
Dimitris Georgantzis Garcia, Gregory J. Chaplain, Jakub Belin, Tomas Tyc, Christoph Englert, Johannes Courtial
Article
Physics, Multidisciplinary
J. Belin, T. Tyc, S. A. R. Horsley
Summary: This study analyzes the evolution of a quantum particle's wavefunction on various compact manifolds, determining stationary states and energy spectrum while demonstrating perfect wavefunction revivals. By utilizing the orbifold structure of the manifolds, the study establishes a connection between wave evolution and Fresnel diffraction, leading to the Talbot effect. This innovative approach provides a new method of optically simulating quantum motion on compact manifolds, while also exploring novel phenomena and the impact of topology on wave properties within the manifolds.
NEW JOURNAL OF PHYSICS
(2021)
Article
Multidisciplinary Sciences
Shuhui Li, Simon A. R. Horsley, Tomas Tyc, Tomas Cizmar, David B. Phillips
Summary: The article discusses the nature of optical memory effects in structures of arbitrary geometry and proposes a framework to estimate the transmission matrix of an optical fiber from just one end through feedback.
NATURE COMMUNICATIONS
(2021)
Article
Optics
Jakub Belin, Johannes Courtial, Tomas Tyc
Summary: Lens stars are composed of identical thin lenses arranged in a regular star shape, suitable for building ideal-lens TO devices. Ray trajectories in lens stars are found to be piecewise straight approximations of conic sections, and the concept is extended to Platonic lenses for further study. The research contributes to the understanding of TO with ideal lenses.
Article
Multidisciplinary Sciences
Qiao Chen, Simon A. R. Horsley, Nelson J. G. Fonseca, Tomas Tyc, Oscar Quevedo-Teruel
Summary: This translated article introduces the composition of a double-layer lens and the derived rotationally symmetric inhomogeneous index profiles and geodesic lens shapes by solving an inverse problem. It also proposes a practical implementation of a low-profile antenna and validates its performance in the millimeter wave band.
NATURE COMMUNICATIONS
(2022)
Correction
Computer Science, Information Systems
Petr Kadera, Jesus Sanchez-Pastor, Hossein Eskandari, Tomas Tyc, Masoud Sakaki, Martin Schuessler, Rolf Jakoby, Niels Benson, Alejandro Jimenez-Saez, Jaroslav Lacik
Article
Physics, Fluids & Plasmas
Tomas Tyc, Darek Cidlinsky
Summary: We introduce the spherical wedge billiard, a dynamical system on a non-Euclidean surface, and reveal its complex dynamics. We also observe the merging of fixed points in the Poincare map when changing the billiard parameter. In the regular regime, the phase space diagram is closely related to Talbot carpets.
Article
Computer Science, Information Systems
Petr Kadera, Jesus Sanchez-Pastor, Hossein Eskandari, Tomas Tyc, Masoud Sakaki, Martin Schusler, Rolf Jakoby, Niels Benson, Alejandro Jimenez-Saez, Jaroslav Lacik
Summary: This paper introduces a three-dimensional retroreflective flattened Luneburg lens based on quasi-conformal transformation optics for wide-angle millimeter-wave radio-frequency indoor localization. The lens is fabricated in alumina through lithography-based ceramic manufacturing process, showing high gain and beam steering angle.
Proceedings Paper
Engineering, Electrical & Electronic
Hossein Eskandari, Amir Reza Attari, Mohammad Saeed Majedi, Tomas Tyc
2019 THIRTEENTH INTERNATIONAL CONGRESS ON ARTIFICIAL MATERIALS FOR NOVEL WAVE PHENOMENA (METAMATERIALS))
(2019)
Proceedings Paper
Engineering, Biomedical
Johanna Tragardh, Tomas Pikalek, Stephen Simpson, Petr Jakl, Martin Siler, Tomas Tyc, Tomas Cizmar
ADAPTIVE OPTICS AND WAVEFRONT CONTROL FOR BIOLOGICAL SYSTEMS V
(2019)
Article
Optics
J. Belin, S. A. R. Horsley, T. Tyc