Article
Engineering, Electrical & Electronic
George Y. Chen, Shane Fox, David G. Lancaster, Soren Soe
Summary: The new fiber-optic torque sensor based on stress-optic effect offers high accuracy and the potential for a wide dynamic range for measuring torque changes accurately on thick metal shafts in heavy industry. The all-fiber sensor head design provides system-level immunity against electromagnetic interference, paving the way for improved performance in demanding industrial applications.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Physics, Multidisciplinary
Nozomi Soya, Michihiro Yamada, Kohei Hamaya, Kazuya Ando
Summary: We report the observation of the isotropic spin Hall effect in a ferromagnet. The spin Hall effect in an epitaxially grown Fe3Si generates a sizable spin current with a spin direction that is noncollinear with the magnetization. The spin Hall current is independent of the relative orientation between its spin direction and the magnetization, demonstrating that the intrinsically generated transverse spin component is protected from dephasing.
PHYSICAL REVIEW LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Kazuaki Ishibashi, Satoshi Iihama, Shigemi Mizukami
Summary: A recent study reported a helicity-dependent photocurrent in Bi single-layer thin films. This photocurrent is believed to originate from the combination of photon-spin conversion and spin-charge conversion effects in Bi, with a high efficiency of spin conversion expected in Bi. In this study, two types of terahertz (THz) emissions from Bi/Co bilayer films were measured to investigate spin current induced by laser induced demagnetization of the Co layer and photon-spin conversion effect in the Bi layer simultaneously. The observed different thickness dependences of peak intensity and bandwidth for THz spin current in the two experiments are attributed to the distinct spin relaxation properties of optically excited spin currents in Bi layers.
Article
Physics, Multidisciplinary
F. Khosravi, B. Jazi, A. Abdoli-Arani
Summary: In this paper, the average force and torque acting on a metallic nanosphere in the presence of a Gaussian laser beam are investigated using classical electromagnetic theory. It is found that the laser beam can apply both effective force and torque to the nanosphere, which is useful for optical manipulation in cancer tissue destruction and drug delivery.
EUROPEAN PHYSICAL JOURNAL PLUS
(2022)
Article
Physics, Fluids & Plasmas
Darci Collins, Rami J. Hamati, Fabien Candelier, Kristian Gustavsson, Bernhard Mehlig, Greg A. Voth
Summary: The isotropic helicoid proposed by Lord Kelvin nearly 150 years ago has been experimentally confirmed to exist, with its chiral coupling attributed to hydrodynamic interactions between the nonchiral vanes. This coupling effect is small due to the nature of the interactions.
PHYSICAL REVIEW FLUIDS
(2021)
Article
Mechanics
Hang-Yu Zhu, Chong Pan, Huan Lian
Summary: This study investigates the dependence of multi-scale droplet settling behavior on characteristic parameters of two-phase turbulent flow through sophisticated conditional analysis. The results show that there is a negative correlation between local particle concentration and settling velocity in the moderate-concentration range, while a positive correlation exists in the high-concentration range. Such a process is consistent with the so-called multi-scale preferential sweeping effect.
Article
Nanoscience & Nanotechnology
Di Yue, Weiwei Lin, C. L. Chien
Summary: Spin pumping experiments using ferromagnetic metals show efficient spin-charge conversion, possibly due to the inverse Rashba-Edelstein effect, while longitudinal spin Seebeck effect experiments using ferrimagnetic insulators do not exhibit appreciable spin-to-charge conversion. The differences between magnetic metals and magnetic insulators as spin current injectors are highlighted, with only detected voltages adhering to the inverse spin Hall effect being due to spin currents.
Article
Chemistry, Multidisciplinary
Jiajing Zhou, Matthew N. Creyer, Amanda Chen, Wonjun Yim, Rene P. M. Lafleur, Tengyu He, Zhixing Lin, Ming Xu, Pedram Abbasi, Jianfeng Wu, Tod A. Pascal, Frank Caruso, Jesse V. Jokerst
Summary: This study demonstrates a method for forming three-dimensional patches in aqueous environments using small molecules in a single step, with patch characteristics modulated by self-polymerizable aromatic dithiol and comixed ligands, indicating an autonomous assembly mechanism. This approach is independent of nanoparticle material and dimension, providing a streamlined and powerful toolset for designing heterogeneous patches at the nanoscale.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Optics
Pedro D. S. Silva, Rodolfo Casana, Manoel M. Ferreira
Summary: The effects of extended constitutive relations on the propagation of waves in bi-isotropic and bi-anisotropic media are investigated using a classical general approach. The study considers different magnetoelectric parameters represented by symmetric and antisymmetric tensors and evaluates the refractive indices, propagation modes, and anisotropy/birefringence effects. The findings provide insights into the identification of the type of bi-anisotropic medium examined and discuss energy propagation in these anisotropic media.
Article
Mechanics
Kyle Pietrzyk, Jeremy A. K. Horwitz, Fady M. Najjar, Roger W. Minich
Summary: This study analyzes particle-laden, isotropic turbulence in three dimensions to understand the dynamics of inertial particles from a kinetic energy perspective. By identifying data trends, it is found that particles tend to accumulate in regions of low flow kinetic energy over time, as they lose kinetic energy and slow down in such regions. A particle kinetic energy equation is derived and hypotheses regarding the temporal change of particle kinetic energy and particle behavior are evaluated using simulation data. The steady-state probability density function of particle kinetic energy is derived using a Fokker-Planck equation. The model fits the simulation data well and provides a tool for investigating preferential concentration and predicting particle kinetic energy in turbulent flows.
Article
Mechanics
Tuo Li, Xinyang Li, Huan Lian
Summary: Particle collisions are mainly affected by the preferential concentration of inertia particles and the formation of fold caustics. Experimental research on the formation of caustics has been limited due to the high accuracy requirements for the particle relative velocity measurements. The second-order relative velocity structure function shows a departure from the Kolmogorov turbulent scaling in the dissipation range, but agrees with the scaling in the inertial range. The conditional second-order relative velocity structure function of particles in clusters differs from arithmetically averaged particle statistics in both the dissipation range and the inertial subrange.
Article
Nanoscience & Nanotechnology
Satoshi Iihama, Kazuaki Ishibashi, Shigemi Mizukami
Summary: The study found that the in-plane field-like optical spin torque in ferromagnet/nonmagnetic heavy metal heterostructures significantly increased with decreasing ferromagnetic layer thicknesses. This interfacial field-like optical spin torque was explained by the optical Rashba-Edelstein effect caused by the structural inversion symmetry breaking.
Article
Chemistry, Multidisciplinary
Hyung Joong Kim, Jong Hoon Kim, Jong Seok Jeong, Chang youn Moon, Sahn Nahm, Ki Min Nam, Jucheol Park, Young Heon Kim
Summary: In this study, the nucleation and crystallization of Bi particles on c-Bi2S3 and a-Bi12TiO20 matrices were investigated using in situ transmission electron microscopy (TEM) analysis. It was found that the growth process followed a two-step nucleation mechanism and was influenced by the matrix, leading to different morphologies and atomic structures of Bi particles on different matrices.
Article
Mechanics
Lishu Duan, Qinmin Zheng, Zhou Jiang, Jianchun Wang
Summary: This study numerically investigates the compressible homogeneous isotropic turbulence of dense gas, focusing on the enstrophy production rate and flow topology effects. The dense gas effect leads to a reduction in enstrophy production in the compression region and weakening of enstrophy loss in the expansion region.
Article
Engineering, Mechanical
N. H. Padmaraj, Kini M. Vijaya, Shreepannaga, U. Amritha, Pai Dayananda
Summary: This study investigates the erosion behavior of carbon/epoxy quasi-isotropic laminates, finding that rotational speed and angle significantly influence erosion, with maximum erosion occurring at a rotational angle of 15 degrees.
ENGINEERING FAILURE ANALYSIS
(2021)
Article
Physics, Multidisciplinary
Tongtong Zhu, Yongyin Cao, Lin Wang, Thongquan Nie, Tun Cao, Fangkui Sun, Zehui Jiang, Manuel Nieto-Vesperinas, Yongmin Liu, Cheng-Wei Qiu, Weiqiang Ding
PHYSICAL REVIEW LETTERS
(2018)
Article
Multidisciplinary Sciences
Philipp Gutsche, Manuel Nieto-Vesperinas
SCIENTIFIC REPORTS
(2018)
Article
Optics
Xiaohao Xu, Manuel Nieto-Vesperinas, Cheng-Wei Qiu, Xiaoshuai Liu, Dongliang Gao, Yao Zhang, Baojun Li
LASER & PHOTONICS REVIEWS
(2020)
Article
Physics, Multidisciplinary
Xiaohao Xu, Manuel Nieto-Vesperinas
PHYSICAL REVIEW LETTERS
(2019)
Article
Multidisciplinary Sciences
Philipp Gutsche, Xavier Garcia-Santiago, Philipp-Immanuel Schneider, Kevin M. McPeak, Manuel Nieto-Vesperinas, Sven Burger
Article
Physics, Multidisciplinary
Hang Li, Yongyin Cao, Bojian Shi, Tongtong Zhu, Yong Geng, Rui Feng, Lin Wang, Fangkui Sun, Yuzhi Shi, Mohammad Ali Miri, Manuel Nieto-Vesperinas, Cheng-Wei Qiu, Weiqiang Ding
PHYSICAL REVIEW LETTERS
(2020)
Article
Physics, Multidisciplinary
Tongtong Zhu, Yuzhi Shi, Weiqiang Ding, Din Ping Tsai, Tun Cao, Ai Qun Liu, Manuel Nieto-Vesperinas, Juan Jose Saenz, Pin Chieh Wu, Cheng-Wei Qiu
PHYSICAL REVIEW LETTERS
(2020)
Article
Chemistry, Multidisciplinary
Yuzhi Shi, Lei-Ming Zhou, Ai Qun Liu, Manuel Nieto-Vesperinas, Tongtong Zhu, Amir Hassanfiroozi, Jingquan Liu, Hui Zhang, Din Ping Tsai, Hang Li, Weiqiang Ding, Weiming Zhu, Ye Feng Yu, Alfredo Mazzulla, Gabriella Cipparrone, Pin Chieh Wu, C. T. Chan, Cheng-Wei Qiu
Summary: This study reveals the emergence of superhybrid modes with magnetic multipoles and electric toroidal moments, excited by linearly polarized beams, leading to giant positive and negative optical torques on Mie-resonant particles. These giant and reversed torques are observed for the first time in the scattering spectrum, opening up a new avenue for exploring metaoptics and optical manipulations.
Article
Physics, Multidisciplinary
Yuzhi Shi, Tongtong Zhu, Ai Qun Liu, Lei-Ming Zhou, Manuel Nieto-Vesperinas, Amir Hassanfiroozi, Jingquan Liu, Din Ping Tsai, Zhenyu Li, Weiqiang Ding, Fan Wang, Hang Li, Qinghua Song, Xiaohao Xu, Baojun Li, Xinbin Cheng, Pin Chieh Wu, Che Ting Chan, Cheng-Wei Qiu
Summary: Negative optical torques, opposite to the direction of spin angular momentum, can emerge when elliptically polarized light waves are obliquely impinged on dielectric nanoparticles. The rotation direction can be switched by controlling the incident angle.
PHYSICAL REVIEW LETTERS
(2022)
Article
Multidisciplinary Sciences
Yuan Zhou, Xiaohao Xu, Yanan Zhang, Manman Li, Shaohui Yan, Manuel Nieto-Vesperinas, Baojun Li, Cheng-Wei Qiu, Baoli Yao
Summary: This study reports a new family of high-order imaginary Poynting momentum (IPM) forces for both magnetoelectric and generic Mie particles, assisted by their excited higher multipoles. These optomechanical manifestations are derived from the nonlocal contribution of IPM to the optical force, which can be significant even when the incident IPM is small. The observation of high-order optomechanics in a structured light beam has important implications for levitated optomechanics and micromanipulations.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Optics
Manuel Nieto-Vesperinas, Xiaohao Xu
Summary: This study uncovers a universal phenomenon regarding the optical force exerted by light on charges and currents, providing a new theoretical framework for understanding the mechanical efficiency of light on matter. By minimizing the reactive momentum, further advancements can be made in the design of optical manipulation, reducing energy dissipation and heating.
LIGHT-SCIENCE & APPLICATIONS
(2022)
Article
Physics, Multidisciplinary
Manuel Nieto-Vesperinas, Xiaohao Xu
Summary: This paper introduces a new theorem in the study of time-harmonic optical fields, discussing complex helicity and its associated reactive quantities. The reactive properties are illustrated through experiments with evanescent waves and fields scattered from magnetodielectric dipolar nanoparticles. Additionally, two optical theorems are established to explain the accumulation of reactive helicity and power in scattered light. This study provides insights into the reactive behavior of light and nanoparticles, which can have applications in optical phenomena such as enantiomeric separation.
PHYSICAL REVIEW RESEARCH
(2021)
Article
Optics
Manuel Nieto-Vesperinas
Article
Materials Science, Multidisciplinary
Natalia Kostina, Mihail Petrov, Aliaksandra Ivinskaya, Sergey Sukhov, Andrey Bogdanov, Ivan Toftul, Manuel Nieto-Vesperinas, Pavel Ginzburg, Alexander Shalin
Proceedings Paper
Materials Science, Multidisciplinary
Philipp Gutsche, Philipp-Immanuel Schneider, Sven Burger, Manuel Nieto-Vesperinas
INTERNATIONAL WORKSHOP ON METAMATERIAL-BY-DESIGN
(2018)
