Article
Engineering, Electrical & Electronic
Atsuhiro Takahashi, Katsuya Nomura, Takashi Kojima, Tsuyoshi Nomura
Summary: This article uses topology optimization to design a new magnetic core structure for an EMI filter circuit, resulting in significantly improved performance. By evaluating the noise reduction effects, it was found that the EMI filter with the optimized magnetic core showed about 30 dB higher performance compared to a filter with conventional ring-shaped cores.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Multidisciplinary Sciences
Aniket Pal, Metin Sitti
Summary: Mechanical instabilities, such as bistable and multistable mechanisms, have attracted attention for enhancing the capabilities of soft robots and structures. This study proposes a simple approach to overcome the limitations of bistable mechanisms by dispersing magnetically active microparticles and using an external magnetic field to control their responses. The predictable and deterministic control of bistable elements under varying magnetic fields is experimentally demonstrated and numerically verified. This strategy enables precise control of transition waves in multistable lattices and the implementation of active elements for mechanical signal processing.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Automation & Control Systems
Shuai Wu, Jack Eichenberger, Jize Dai, Yilong Chang, Nima Ghalichechian, Ruike Renee Zhao
Summary: This article introduces a new type of magnetically actuated structurally reconfigurable electromagnetic metamaterial, which can achieve rapid, reversible, and programmable shape morphing, with better adaptability and deformability than traditional metamaterials.
ADVANCED INTELLIGENT SYSTEMS
(2022)
Article
Physics, Multidisciplinary
Jonatha Santini, Emanuele Riva
Summary: We provide a theoretical framework for time-modulated mechanical metamaterials with frequency conversion and wave-steering capabilities. We demonstrate that careful modulation can reduce undesired reflections and achieve frequency conversion in both 1D and 2D lattices. This paper explores a new way to control wave propagation in elastodynamics and open new avenues for information manipulation and transport through elastic waves.
NEW JOURNAL OF PHYSICS
(2023)
Article
Physics, Fluids & Plasmas
A. H. Gevorgyan
Summary: This study investigated the specific properties of magnetically induced transparency (MIT) and magnetically induced absorption (MIA) in helically structured periodic crystals (HSPCs). An analytical formula for the wavelength lambda(t) of MIT and MIA resonance was obtained based on numerical simulations. The influence of HSPC parameters on the wavelength lambda(t) and the transparency line half width Delta lambda(t) was explored, along with the investigation of light energy density, ellipticity, and azimuth of the total wave excited in the HSPC layer for MIT and MIA modes.
Article
Nanoscience & Nanotechnology
Wenjie Chen, Junjie Zhan, Yi Zhou, Rui Chen, Yubo Wang, Yungui Ma
Summary: The research proposes a comprehensive stealth technology that can simultaneously handle microwave absorption and adjustable visible and near-infrared spectra to adapt to different environments. The designed artificial coat can absorb over 80% energy in the X-band and its visible and near-infrared spectra can be electrically adjusted through an integrated emission system. This method could be extended to broader wave bands and has potential applications in multifunctional stealth technologies.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Instruments & Instrumentation
Ioan Bica, Eugen Mircea Anitas
Summary: In this study, cotton fabric based membranes were fabricated with the addition of barium titanate nanoparticles, providing resistive, capacitive, and piezoelectric functions. The resulted membranes were used to create plane electrical devices with potential applications as sensors and generators.
SMART MATERIALS AND STRUCTURES
(2022)
Article
Chemistry, Multidisciplinary
Krzysztof K. Dudek, Julio A. Iglesias A. Martinez, Gwenn Ulliac, Laurent Hirsinger, Lianchao Wang, Vincent Laude, Muamer Kadic
Summary: A novel micro-scale mechanical metamaterial is proposed that can significantly change its mechanical and wave propagation properties without rebuilding the structure. The reconfiguration process can be induced and controlled remotely through the application of a magnetic field using appropriately distributed magnetic inclusions.
ADVANCED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Qilin Luo, Lingzhong Zhao, Jialin Zhou, Lin Zhang, Guangfeng Wen, Qingtao Ba, Huabing Wu, Zhifang Lin, Shiyang Liu
Summary: In this study, a zero-index-based heterostructured magnetic metamaterial is presented, which allows for unidirectional propagation of electromagnetic waves that can be reconfigured depending on the bias magnetic field. The research shows that two different types of metamaterials can be constructed to achieve unidirectional transport of electromagnetic waves.
FRONTIERS IN MATERIALS
(2022)
Article
Multidisciplinary Sciences
Jingxi Li, Tianyi Gan, Yifan Zhao, Bijie Bai, Che-Yung Shen, Songyu Sun, Mona Jarrahi, Aydogan Ozcan
Summary: The first demonstration of unidirectional imagers is reported, presenting polarization-insensitive and broadband uni-directional imaging based on successive diffractive layers that are linear and isotropic. The diffractive unidirectional imager maintains its functionality over a large spectral band and works under broadband illumination. The diffractive unidirectional imaging using structured materials will have applications in security, defense, telecommunications, and privacy protection.
Article
Optics
Jiaqing Liu, Xiao Li, Jiaqi Tao, Daxing Dong, Youwen Liu, Yangyang Fu
Summary: In this study, a significant enhancement of the photonic spin Hall effect (SHE) was achieved in a plasmonic metasurface with S-4 symmetry. A new method for designing spin-based nanophotonic devices was discovered.
Article
Materials Science, Multidisciplinary
Shun Wang, Xiaotian Cui, Ronghuan Xie, Changwen Zhang, Yufeng Tian, Lihui Bai, Qikun Huang, Qiang Cao, Shishen Yan
Summary: Researchers observed unidirectional magnetoresistance (UMR) in a single CoPt film by introducing a vertical composition gradient to break structural inversion symmetry. Unlike conventional bilayer films, the UMR in the CoPt film can be controlled by current amplitude and shows different changes at different current densities. This work provides a promising way to manipulate UMR in a single ferromagnetic film using charge-spin conversion and magnetothermal effect.
Review
Nanoscience & Nanotechnology
Ying Li, Wei Li, Tiancheng Han, Xu Zheng, Jiaxin Li, Baowen Li, Shanhui Fan, Cheng-Wei Qiu
Summary: This review provides a unified perspective on heat transfer control, summarizing complementary paradigms towards the manipulation of physical parameters at different length scales. Thermal conduction and radiation are emphasized in the first two parts, while the third part discusses efforts to actively introduce heat sources or tune material parameters with multiphysical effects.
NATURE REVIEWS MATERIALS
(2021)
Article
Optics
Harry Miyosi Silalahi, Wei-Fan Chiang, Yi-Hong Shih, Wan-Yi Wei, Jou-Yu Su, Chia-Yi Huang
Summary: This study successfully fabricates a folding metamaterial with split-ring resonators (SRRs) to enhance electromagnetic resonance and achieve detection of aqueous solutions. The folding metamaterial has great potential in detecting products of live microorganisms with geometrical sizes up to several hundreds of micrometers.
PHOTONICS RESEARCH
(2022)
Article
Acoustics
Lucas Y. M. Sampaio, Gabriel K. Rodrigues, Jaime A. Mosquera-Sanchez, Carlos De Marqui Jr, Leopoldo P. R. de Oliveira
Summary: Acoustic metamaterials utilize periodic distribution of features, with membrane-type acoustic metamaterials showing significant attenuation in a narrow frequency range due to the use of lightweight elements in design. Smart MAMs, utilizing smart materials, improve attenuation performance at different frequency ranges and show promising applications in effective, lightweight acoustic barriers.
JOURNAL OF SOUND AND VIBRATION
(2021)
Article
Chemistry, Physical
Huajin Chen, Wanli Lu, Juanjuan Li, Jingjing Yu, Zhifang Lin, Che Ting Chan, Shiyang Liu
Article
Physics, Multidisciplinary
San-Dong Guo, Yue-Hua Wang, Wan-Li Lu
NEW JOURNAL OF PHYSICS
(2017)
Article
Optics
Wanli Lu, Huajin Chen, Shiyang Liu, Zhifang Lin
Article
Optics
Wanli Lu, Huajin Chen, Sandong Guo, Shiyang Liu, Zhifang Lin
Article
Computer Science, Interdisciplinary Applications
Hongxia Zheng, Xinning Yu, Wanli Lu, Jack Ng, Zhifang Lin
COMPUTER PHYSICS COMMUNICATIONS
(2019)
Article
Optics
Wanli Lu, Xu Sun, Huajin Chen, Shiyang Liu, Zhifang Lin
Article
Engineering, Electrical & Electronic
Xu Sun, Zhe An, Wanli Lu
IEEE PHOTONICS JOURNAL
(2020)
Article
Physics, Multidisciplinary
Huajin Chen, Hongxia Zheng, Wanli Lu, Shiyang Liu, Jack Ng, Zhifang Lin
PHYSICAL REVIEW LETTERS
(2020)
Article
Optics
Yusen Zhang, Ziheng Xiu, Xiangsuo Fan, Ruxue Li, Huajin Chen, Hongxia Zheng, Wanli Lu, Zhifang Lin
Summary: Based on full wave simulation and the Maxwell stress tensor theory, this study demonstrates an enhanced transverse optical gradient force acting on Rayleigh particles immersed in a simple optical field formed by two linearly polarized plane waves. The force can be enhanced by two orders of magnitude via coating an extremely thin silver shell on the conventional dielectric particle. The enhanced force mainly comes from the interaction between the incident field and the electric quadrupole excited in the core-shell particle. In addition, the optical potential energy and the optical trapping stiffness for the core-shell particle are greatly enhanced, making stable optical trapping possible.
Article
Optics
Pengbo Liu, Zhenghe Zhang, Man Lang, Wanli Lu, Ping Bai, Zefeng Chen, Shaojun Wang, Xiaofeng Li
Summary: This study presents a new technique to integrate atomic layers into silicon nanoparticle arrays, aiming to enhance the performance of photonic devices. By adjusting the parameters of the arrays, the emission from monolayer semiconductors can be controlled and manipulated.
Article
Optics
Lv Feng, Jiangnan Ma, Wanli Lu, Huajin Chen, Hongxia Zheng
Summary: Based on the multipole expansion theory, it is shown that a transverse optical torque acting on a dipolar plasmonic spherical nanoparticle can be anomalously enhanced in two plane waves with linear polarization. Compared to a homogeneous Au nanoparticle, the transverse optical torque acting on an Au-Ag core-shell nanoparticle with an ultra-thin shell thickness can be dramatically enhanced by more than two orders of magnitude. This enhanced transverse optical torque is dominated by the interaction between the incident optical field and the electric quadrupole excited in the dipolar core-shell nanoparticle. It is noted that the torque expression based on the dipole approximation usually used for dipolar particles is not available even in our dipolar case. These findings deepen the understanding of the optical torque and may have applications in optically driven rotation of plasmonic microparticles.
Article
Optics
Wanli Lu, Huajin Chen, Shiyang Liu, Zhifang Lin
Summary: An arbitrary conical angle is introduced to study the propagation properties of circular Airy beams beyond the paraxial approximation. It is found that the nonparaxiality becomes obvious for large conical angles, and the field intensity at the focal point can be enhanced by adjusting the conical angle. Moreover, the longitudinal component of the field is enhanced and the longitudinal gradient of the field intensity is enlarged for large conical angles, suggesting the possibility of stable optical trapping for microparticles.
Article
Optics
Ziheng Xiu, Yusen Zhang, Hongsheng Shi, Hongxia Zheng, Huajin Chen, Wanli Lu, Zhifang Lin
Summary: This study demonstrates that under specific conditions, spherical particles can experience lateral optical forces in optical fields formed by multiple circularly polarized plane waves, with the force magnitude depending on the Poynting vector of the illuminating field. The spatial distribution of the lateral optical force is primarily determined by the illuminating field's Poynting vector, while the particle material and size mainly affect the force magnitude rather than the spatial profile. These findings enrich the concept of lateral optical forces and provide a new approach for optical manipulation.
Article
Optics
Hongsheng Shi, Hongxia Zheng, Huajin Chen, Wanli Lu, Shiyang Liu, Zhifang Lin
Article
Optics
Wanli Lu, Xu Sun, Huajin Chen, Shiyang Liu, Zhifang Lin
