Article
Materials Science, Multidisciplinary
Zheren Cai, Shengdong Zhao, Zhandong Huang, Zheng Li, Meng Su, Zeying Zhang, Zhipeng Zhao, Yanlin Song
Summary: This paper verifies the negative refraction and acoustic imaging capacity of acoustic metamaterials composed of 2D underwater elastic shell encapsulated bubble arrays, and discusses the influence of thermoviscous loss and damping on imaging.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Physics, Multidisciplinary
Zhiyuan Zhou, Xiao Wang
Summary: Negative refraction in multilayered metal-dielectric metamaterials can be achieved not only through negative refractive indices or hyperbolic-like isofrequency surfaces, but also by ellipse-like isofrequency surfaces. The phenomenon is theoretically demonstrated and verified through numerical simulation. The energy flow of ellipse-like modes in the layers is investigated and compared with that of hyperbolic-like modes. Moreover, negative double refraction is achieved by combining ellipse-like and hyperbolic-like isofrequency surfaces.
Article
Optics
Yiwei Peng, Jie Sheng, Jianlan Xie, Junzhe Yu, Jianjun Liu
Summary: In this study, an ultratransparent medium with wide-angle negative refraction (NR) index is proposed, and the imaging with its flat lens is discussed through theoretical analysis and simulation verification. The photonic crystal (PC) designed as an instance of the medium can achieve NR within 50° and positive refraction (PR) within 75° with transmittances over 99%, making it an ideal material for multifunctional NR/PR devices with ultra-low loss.
Article
Physics, Multidisciplinary
Martin T. Hill
Summary: This study extends the concept of a compact optical switch based on moving a negative-index media (NIM) load to include waveguides carrying transverse magnetic (TM) modes. Simulations show that switching is possible for TM modes using current metamaterial NIM implementations.
Article
Physics, Applied
B. Meirbekova, L. Morini, M. Brun, G. Carta
Summary: In this paper, the phenomenon of negative reflection in a mechanical phononic structure is studied. The structure consists of fixed inclusions embedded in a linear elastic matrix. The negative reflection is not due to subwavelength metastructures or materials with negative mechanical properties. Numerical analyses demonstrate that there are frequencies at which most of the incident energy is reflected at negative angles. The effect is symmetric with respect to a line that is not parallel to the normal direction to the grating structure. Simulations and computations show that negative reflection is achievable in a wide range of loading conditions.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Ling-Ling Zhang, Xiao-Jun Liu
Summary: This work investigates the excitation conditions for acoustic lasing and coherent perfect absorption in acoustic metamaterials. It also explores the coexistence of these phenomena. The study shows that all-angle negative refraction and planar focusing can be achieved through specific structural designs. This research opens up new possibilities for applications in acoustic perfect imaging.
APPLIED SCIENCES-BASEL
(2022)
Article
Physics, Applied
Shuanglong Liu, Fei Chen, Tian Yang, Robert G. Parker, Pai Wang, Tianzhi Yang
Summary: This article reports an easy-to-make, resonance-based mechanism for achieving negative rotational inertia. The device consists of a heavy inner core, a lightweight outer shell, and rubber connections. The authors theoretically predict and experimentally observe negative rotational inertia in the range of 100-230 Hz. They also investigate the relationship between the bandwidth of negative inertia and the bandgap in a chain of negative-inertia units, revealing a unique property and potential applications in metamaterial designs.
APPLIED PHYSICS LETTERS
(2023)
Article
Engineering, Marine
R. Porter, C. Marangos
Summary: This paper examines the propagation of plane incident waves over a long submerged uniform rectangular structured ridge protruding from the sea bed. It shows that negative refraction of obliquely-incident waves is possible if the barriers are sufficiently close to the surface. Additionally, it is found that the modulus of reflection and transmission coefficients are symmetric functions of the incident wave heading and the barrier orientation.
Article
Physics, Applied
Chengming Xuan, Weikai Xu, Zhe Yang, Wuchao Qi, Wei Wang
Summary: This paper proposes a one-dimensional phononic crystal-type metastructure, which can achieve a full range of phase shifts and broadband frequency tuning by adjusting the distance between mass oscillators and increasing or decreasing the number of oscillators, realizing phenomena such as abnormal refraction, beam focusing, and self-acceleration based on the generalized Snell's law.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Ling-Ling Zhang, Yang Ji, Peng Chen, Qian Dai, Xiao-Jun Liu
Summary: This paper investigates the coexistence of coherent perfect absorption and laser modes in acoustic purely imaginary metamaterial slabs and explores the possibility of bidirectional negative refraction and planar focusing.
APPLIED SCIENCES-BASEL
(2022)
Article
Physics, Applied
Afshin Moradi, Nurhan Tuerker Tokan
Summary: In this study, the magnetostatic microwave propagation in a long, circular waveguide filled with an anisotropic uniaxial magnetic medium (such as metamaterial with split-ring resonators) is investigated. The existence of these magnetostatic waves is attributed to the anisotropic property of the system, and their characteristics are determined through theoretical analysis.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Hyungki Shim, Francesco Monticone, Owen D. Miller
Summary: This study reveals the fundamental limits to the refractive index of any material and demonstrates that nature has nearly reached a Pareto frontier for refractive index and dispersion. However, for narrow-bandwidth applications, highly dispersive, high-index materials are not readily available in nature. The theory of composites is utilized to identify metal-based metamaterials with potential for significant increases in refractive index.
ADVANCED MATERIALS
(2021)
Review
Optics
Leonid Yu. Beliaev, Osamu Takayama, Pavel N. Melentiev, Andrei V. Lavrinenko
Summary: Photoluminescence, including fluorescence, is crucial in various applications from biomedical sensing to optoelectronics. Hyperbolic metamaterials (HMMs) are highly anisotropic materials that enhance photoluminescence naturally in dye molecules, quantum dots, diamond nitrogen-vacancy centers, perovskites, and transition metal dichalcogenides.
OPTO-ELECTRONIC ADVANCES
(2021)
Article
Multidisciplinary Sciences
Hai Hu, Na Chen, Hanchao Teng, Renwen Yu, Mengfei Xue, Ke Chen, Yuchuan Xiao, Yunpeng Qu, Debo Hu, Jianing Chen, Zhipei Sun, Peining Li, F. Javier Garcia de Abajo, Qing Dai
Summary: Negative refraction is achieved using hybrid topological polaritons in van der Waals heterostructures, allowing for gate-tunable manipulation of mid-infrared radiation. Wide-angle negatively refracted polaritons are observed in partially decorated a-MoO3 films with graphene, demonstrating reversible nanoscale focusing. This technique offers possibilities for electrically tunable super-resolution imaging, nanoscale thermal manipulation, enhanced molecular sensing, and on-chip optical circuitry.
Article
Chemistry, Multidisciplinary
Anton Melnikov, Soeren Koeble, Severin Schweiger, Yan Kei Chiang, Steffen Marburg, David A. Powell
Summary: This study proposes a method of manipulating acoustic wavefronts using acoustic metagratings and manufactures microscopic acoustic metamaterials using two-photon polymerization. The impact of thermoviscous effects is considered in the design, and shape optimization techniques are used to develop meta-atoms insensitive to these effects.
Article
Chemistry, Multidisciplinary
Mu Ku Chen, Xiaoyuan Liu, Yongfeng Wu, Jingcheng Zhang, Jiaqi Yuan, Zhengnan Zhang, Din Ping Tsai
Summary: This study demonstrates an intelligent and compact depth-sensing meta-device that is capable of measuring depth in various light levels. It utilizes a compact and multifunction stereo vision system with an array of 3600 achromatic meta-lenses to collect light field information and project structured light using a light source. The depth information can be analyzed and extracted using convolutional neural networks.
ADVANCED MATERIALS
(2023)
Article
Optics
Yuhu Tang, Yao Liang, Jin Yao, Mu Ku Chen, Shirong Lin, Zhuo Wang, Jingcheng Zhang, Xu Guang Huang, Changyuan Yu, Din Ping Tsai
Summary: This study demonstrates numerically the use of 3D plasmonic metasurfaces to overcome the trade-off between Q-factor and circular dichroism (CD) in chiral BIC metasurfaces, achieving high-Q quasi-BIC resonances (Q ≈ 938) with strong CD (≈ 0.67) in the mid-infrared. The independent manipulation of Q-factor and CD is made possible by the dissimilar dimer configuration consisting of a twisted vertical split-ring resonator (VSRR) and a wall, where the height of the wall and the twisted angle of the VSRR control the Q-factor and CD, respectively. These findings offer new paradigms for controlling advanced chiroptical responses and have potential applications that require strong CD with enhanced light-matter interaction.
LASER & PHOTONICS REVIEWS
(2023)
Article
Nanoscience & Nanotechnology
Xiaoyuan Liu, Mu Ku Chen, Cheng Hung Chu, Jingcheng Zhang, Borui Leng, Takeshi Yamaguchi, Takuo Tanaka, Din Ping Tsai
Summary: This study developed a novel underwater binocular depth-sensing and imaging meta-optic device using GaN binocular meta-lens. The advantages of this device include no need for distortion correction or camera calibration, fast real-time processing capability, and superhydrophobicity properties. It can benefit various applications such as underwater robotics, marine ecological surveys, and machine vision in the ocean.
Article
Nanoscience & Nanotechnology
Mu Ku Chen, Jing Cheng Zhang, Cheuk Wai Leung, Linshan Sun, Yubin Fan, Yao Liang, Jin Yao, Xiaoyuan Liu, Jiaqi Yuan, Yuanhao Xu, Din Ping Tsai, Stella W. Pang
Summary: A polymer-based twisted bilayer meta-device fabricated by multilayer nanoimprint technology can create moire patterns and exhibit unique chiral optical responses. By controlling the twist angle, the electric field of light can be manipulated to reveal the chiral magic angle. This nanoimprint technology and chiral meta-devices may have potential applications in chiral imaging, biomedical sensing, lasing, and tunable optical devices.
Article
Optics
Zhuo Wang, Yao Liang, Jiaqi Qu, Mu Ku Chen, Mingjie Cui, Zhi Cheng, Jingcheng Zhang, Jin Yao, Shufan Chen, Din Ping Tsai, Changyuan Yu
Summary: This study demonstrates the precise control of light-matter interaction through plasmonic resonances empowered by bound states in the continuum (BICs). By exploiting BICs in the parameter space, sharp resonances with ultra-weak angular dispersion effect and polarization-independent performance are achieved on symmetric plasmonic metasurfaces. These results provide a way to achieve efficient near-field enhancement using focused light produced by high numerical aperture objectives.
PHOTONICS RESEARCH
(2023)
Article
Multidisciplinary Sciences
Jing Cheng Zhang, Geng-Bo Wu, Mu Ku Chen, Xiaoyuan Liu, Ka Fai Chan, Din Ping Tsai, Chi Hou Chan
Summary: The development of the sixth-generation (6G) communication technology is in progress and it is expected to surpass the performance of the fifth generation. The precise control of information transfer direction and signal concentration is crucial in 6G technology.
Article
Optics
Chao Feng, Tao He, Yuzhi Shi, Qinghua Song, Jingyuan Zhu, Jian Zhang, Zhanshan Wang, Din Ping Tsai, Xinbin Cheng
Summary: This study proposes a compact and efficient diatomic metasurface platform that can efficiently modulate the six-channel Jones matrix. It demonstrates the independent regulation of six Jones-matrix channels and integrates three nanoprinting images and three holographic images into a single metasurface. By interleaving two diatomic meta-atoms operating at two different wavelengths within a super-pixel, the multiplexing capacity of the Jones matrix is extended to twelve channels, enabling broader applications of multi-functional optical devices in various fields.
LASER & PHOTONICS REVIEWS
(2023)
Article
Physics, Multidisciplinary
Huai-Yi Xie
Summary: This paper constructs the dyadic Green's functions (DGFs) for a stratified sphere made of a topological insulator (TI) based on axion electrodynamics, considering the axion coupling effect. The formulation of light scattering from a dipole near the TI stratified sphere is derived using these DGFs. Numerical studies are conducted on different configurations to investigate the influence of the topological magneto-electric (TME) response of the TI sphere on the multipolar plasmonic resonance of the metal shells. The results show that the TME effect causes modifications of the decay rate spectrum for the emitting dipole near the TI stratified sphere.
Article
Materials Science, Multidisciplinary
Jin Yao, Mu Ku Chen, Rong Lin, Din Ping Tsai, Kwai-Man Luk
Summary: We propose a design strategy based on the phase compensation mechanism to continuously tune the properties of water-based meta-lenses at 5 GHz. By changing the filling height of water in the designed meta-lens, the focal length can be tuned from 228 to 424 mm. The off-axis focusing of the meta-lens is also demonstrated in which the deflection angle is adjustable from around 0 degrees to 5 degrees. This work will pave the way for designing tunable water-based meta-devices and facilitating their applications in microwave imaging systems.
ADVANCED OPTICAL MATERIALS
(2023)
Editorial Material
Optics
Yubin Fan, Jin Yao, Din Ping Tsai
Summary: A new framework for optimizing light coherence is proposed to design non-ideal broadband achromatic lenses, allowing for the implementation of large-scale flat lenses and high-performance. This strategy paves the way for practical planar optical devices and full-color imaging systems.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Review
Optics
Jin Yao, Rong Lin, Mu Ku Chen, Din Ping Tsai
Summary: Integrated-resonant units (IRUs), which combine various meta-atoms, resonant modes, and functionalities into a supercell, have shown great promise in tailoring composite and multifunctional electromagnetic responses. They can overcome limitations in conventional optical devices and offer potential for versatile applications. This paper focuses on recent progress in integrated-resonant metadevices, discussing the design principles, characteristics, practical applications, challenges, and future research directions.
ADVANCED PHOTONICS
(2023)
Article
Chemistry, Multidisciplinary
Jing Cheng Zhang, Mu Ku Chen, Yao Liang, Xiao Hong, Muting Wang, Yijun Cheng, Xiaoyuan Liu, Din Ping Tsai, Stella W. Pang
Summary: In this study, a large-scale chiral imaging meta-device with broadb and chirality control was experimentally demonstrated. The centimeter-scale Moire meta-device was achieved using nanoimprint technology. The Poynting vector, singularity features, and chiral optical response were discussed. The proposed Moire meta-devices can achieve circular dichroism (CD) of more than 10%. Further applications in various fields were also explored.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Review
Nanoscience & Nanotechnology
Jing Cheng Zhang, Yubin Fan, Jin Yao, Mu Ku Chen, Shirong Lin, Yao Liang, Borui Leng, Din Ping Tsai
Summary: This article provides an overview of recent advancements in the fundamentals and applications of programmable optical meta-holograms. It aims to provide readers with general knowledge and inspiration for applying these holograms in the metaverse, and discusses the challenges and prospects in these rapidly growing research areas.
Article
Physics, Applied
Sibo Huang, Yong Li, Jie Zhu, Din Ping Tsai
Summary: This article provides an overview of recent progress in and future prospects for sound-absorbing materials (SAMs), including single resonant SAMs and coupled resonant systems, as well as the emergence of sound-absorbing metamaterials. The conservation equations and design strategies for achieving tunable and broadband SAMs are discussed, along with recent developments in multifunctional SAMs and metaliners. The article concludes with an outlook on potential directions and applications for future work in this field.
PHYSICAL REVIEW APPLIED
(2023)
Article
Optics
Xiaoyuan Liu, Mu Ku Chen, Din Ping Tsai
Summary: Artificial intelligence (AI) has been widely integrated into various domains of production and daily life. To overcome the challenges faced by electronic AI, a new concept of photonic meta-neurons is proposed, which achieves flexible modulation of optical signals through optical emulation of biological neurons. Meta-neurons offer advantages such as light-speed processing, parallel computing, clean energy utilization, and wide applicability.
LASER & PHOTONICS REVIEWS
(2023)
Article
Physics, Condensed Matter
Shivani Gohri, Jaya Madan, Rahul Pandey
Summary: This study improves the efficiency of SnS-based solar cells by implementing the glancing angle deposition approach and introducing a CZTSSe layer. The findings offer valuable insights for enhancing the design of SnS-based solar cells and making them more efficient.
SOLID STATE COMMUNICATIONS
(2024)
Article
Physics, Condensed Matter
Mahboubeh Yeganeh, Davoud Vahedi Fakhrabad
Summary: The lattice thermal conductivity of CdO monolayer was investigated, and it was found to be lower than that of bulk CdO due to the lower phonon lifetime and phonon group velocity. As a result, the monolayer exhibits higher thermoelectric efficiency compared to the bulk counterpart.
SOLID STATE COMMUNICATIONS
(2024)
Article
Physics, Condensed Matter
Shivam Srivastava, Prachi Singh, Anjani K. Pandey, Chandra K. Dixit
Summary: In this research paper, a novel equation of state (EOS) based on finite strain theories is proposed for predicting the thermo elastic properties of various materials. Extensive analysis and comparison with existing models and experimental data demonstrate the validity and effectiveness of the proposed EOS in capturing the unique thermodynamic behavior of nanomaterials, bulk metallic glasses, and superconductors. This research is of great importance in the fields of materials science, nanotechnology, and condensed matter physics.
SOLID STATE COMMUNICATIONS
(2024)
Article
Physics, Condensed Matter
Subrata Das, Sanjoy Kr Mahatha, Konstantin Glazyrin, R. Ganesan, Suja Elizabeth, Tirthankar Chakraborty
Summary: In this study, we investigated the structural evolution of Tb2Ti2O7 under external pressure and temperature, and confirmed the occurrence of an isostructural phase transition beyond 10 GPa pressure. This transition leads to changes in lattice parameters and mechanical properties, which can be understood in terms of localized rearrangement of atoms.
SOLID STATE COMMUNICATIONS
(2024)
Article
Physics, Condensed Matter
Hamze Mousavi
Summary: It has been found that undoped graphene sheet has zero states at the Fermi energy level, making it difficult for Cooper pairing to occur in the superconductive state. However, T-graphene, with physical properties similar to graphene, exhibits metallic behavior and has available electron states near the Fermi level. The gap equation for the s-wave superconductive state is derived based on the attractive Hubbard model and the Bogoliubov de Gennes equation for this two-dimensional metallic system. It is found that a nonzero critical temperature, τ, exists for different levels of electron-electron interaction, ǫ. τ has higher values when the system has electronic half band-filling, but decreases when the system does not have half band-filling. However, τ vanishes when ǫ becomes small enough near the band edges.
SOLID STATE COMMUNICATIONS
(2024)
