Article
Physics, Applied
Yuan Tian, Hao Ge, Xiu-Juan Zhang, Xiang-Yuan Xu, Ming-Hui Lu, Yun Jing, Yan-Feng Chen
Summary: This study proposes and experimentally demonstrates a far-field acoustic subwavelength imaging method based on a single stationary detector. By combining the principles of computational imaging and metalens, high-quality images of subwavelength objects can be reconstructed in the far field.
PHYSICAL REVIEW APPLIED
(2022)
Article
Physics, Applied
Jinuan Lin, Chu Ma
Summary: This work presents a blind structured illumination microscopy (blind-SIM) system that achieves subwavelength resolution in acoustic far-field imaging. The system generates acoustic structured illuminations (SI) using a randomly located subwavelength diffraction grating, converting evanescent waves to propagating waves. The object's image is reconstructed using a joint-sparsity compressive sensing algorithm, reducing the hardware complexity compared to existing technologies. This system has potential in improving the practicality of acoustic far-field subwavelength imaging in various applications.
PHYSICAL REVIEW APPLIED
(2022)
Article
Acoustics
Dingyu Hu, Jinjin Ding, Han Zhao, Liang Yu
Summary: Two methods for constructing spatial basis functions based on the homogeneous Helmholtz equation solution are proposed in this paper. The generalized harmonic polynomials (GHPs) and the plane wave expansion (the quasi-uniform plane wave and the non-uniform plane wave) are compared in terms of their spectral matrix completion errors, showing that both methods yield low errors. The effectiveness of the proposed bases in the non-synchronous measurements is validated with simulations and an experiment.
Article
Physics, Multidisciplinary
Yadong Mu, Gaokun Yu, Ning Wang
Summary: In this study, far-field subwavelength imaging is achieved by using a reconstruction algorithm to compensate for the sensitivity of resonant modes to absorption loss. Experimental results demonstrate that multiple imaging sources can be well resolved by using multiple frequencies near the fifth resonant mode.
NEW JOURNAL OF PHYSICS
(2022)
Article
Optics
Yonglei Liu, Yahong Chen, Fei Wang, Yangjian Cai, Chunhao Liang, Olga Korotkova
Summary: This study explores the impact of the coherence function on information transmission in a light field, revealing a new degree of freedom for information transfer. By studying the unique propagation characteristics of partially coherent beams, a novel method for far-field imaging in turbulent media is proposed, with advantages of confidentiality and turbulence resistance.
OPTO-ELECTRONIC ADVANCES
(2021)
Article
Physics, Applied
Shuhuan Xie, Hua Ding, Zhiling Zhou, Yong Li, Tong Hao
Summary: The manipulation of waves through acoustic metamaterials and its application in super-resolution edge detection has been achieved. Increasing the side length ratio of narrow to wide segments effectively broadens the working bandwidth of the edge detection, and the imaging resolution is mainly determined by the size of the first narrow segment of the edge detector. Breaking the periodicity of these segments allows for a wide working bandwidth (approximately 900 Hz) and an imaging resolution of 0.11 lambda.
APPLIED PHYSICS EXPRESS
(2022)
Article
Optics
Jin Zhao, Li-Zheng Yin, Feng-Yuan Han, Yi-Dong Wang, Tie-Jun Huang, Chao-Hai Du, Pu-Kun Liu
Summary: Inspired by the capability of structured illumination microscopy, researchers have developed a subwavelength non-fluorescent imaging method based on terahertz traveling waves and plasmonics. By using spoof surface plasmons as one of the illuminating sources, encoding high-order spatial frequencies into obtainable low-order ones, and applying a modified post-processing algorithm to shift the frequency components, the resolution can be enhanced effectively for sample reconstruction. This method shows promise for important applications in terahertz non-fluorescent microscopy and weak scattering sample detection.
Article
Physics, Applied
Guangxin Liao, Congcong Luan, Zhenwei Wang, Jiapeng Liu, Xinhua Yao, Jianzhong Fu
Summary: Acoustic metamaterials have the ability to effectively control wave propagation through special structures, with high transmission efficiency and full range phase shift variations. The designed acoustic metamaterials can manipulate transmission angle according to the generalized Snell's law, and are capable of selective permeability for acoustic filtering. The devices exhibit great potential for applications in various fields.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Multidisciplinary Sciences
Junxiao Zhou, Haoliang Qian, Junxiang Zhao, Min Tang, Qianyi Wu, Ming Lei, Hailu Luo, Shuangchun Wen, Shaochen Chen, Zhaowei Liu
Summary: This study demonstrates for the first time broadband two-dimensional spatial differentiation and high-contrast edge imaging based on a dielectric metasurface across the whole visible spectrum. The method works for both intensity and phase objects simply by inserting the metasurface into a commercial optical microscope, opening up new opportunities for fast, compactible, and power-efficient ultrathin devices in data processing and biological imaging applications.
NATIONAL SCIENCE REVIEW
(2021)
Article
Engineering, Electrical & Electronic
Zan Li, Jinyu Ma, Jian Li, Xinjing Huang
Summary: This study presents a systematic method of using a compact graded refractive index (GRIN) acoustic metamaterial (AMM) with an embedded microelectromechanical systems (MEMS) microphone to enhance far-field acoustic sensing and imaging. Experiments demonstrate that the improved phased array with compact AMMs can image objects in the far field with high angular resolution.
IEEE TRANSACTIONS ON COMPUTATIONAL IMAGING
(2023)
Article
Optics
Z. H. E. N. Z. H. A. O. Guo, J. I. N. B. I. A. O. Xiao, S. H. E. N. G. B. A. O. Wu
Summary: A universal and scalable mode-order converting scheme is proposed using subwavelength grating metamaterials. It enables flexible mode-order conversions on-chip and holds great promise for optical multimode based technologies.
Article
Geochemistry & Geophysics
Qijia Guo, Siyun Yang, Tian Zhou, Zhongmin Wang, Hong-Liang Cui
Summary: This paper proposes an online Kalman filtering sparse Bayesian learning (online-KSBL) based compressive beamformer for efficient underwater acoustic imaging. By treating each snapshot independently and utilizing a sawtooth algorithm for efficient parameter estimation, the model achieves high performance with low complexity. Experimental results demonstrate its competitiveness in underwater imaging, even without considering snapshot correlation.
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
(2022)
Article
Engineering, Electrical & Electronic
E. E. Franco, C. A. Burbano, F. Buiochi, J. H. Lopes
Summary: Recent research has demonstrated the successful use of elementary objects as acoustic lenses to focus ultrasound fields in regions below the incident wavelength. By coupling a 1 MHz shear transducer with a Rexolite triangular prism, researchers have discovered a new subwavelength twin ultrasound focusing (STUF) beam generation method.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Physics, Applied
Jian Chen, Zeqing Sun, Jing Rao, Danylo Lisevych, Zheng Fan
Summary: By exploiting field enhancement inside the metalens, breakthrough deep-subwavelength acoustic imaging is achieved with improved resolution, contrast, and working bandwidth. This method has the potential to greatly benefit various fields such as medical diagnosis and industrial nondestructive evaluation.
PHYSICAL REVIEW APPLIED
(2021)
Article
Chemistry, Multidisciplinary
Hui Liu, Shiyou Wu, Meng Zhao, Chao Li, XiaoJun Liu, Guangyou Fang
Summary: This work introduces a terahertz spiral spatial filtering imaging method for enhancing THz image contrast. By utilizing Fourier transform and spiral phase modulation, the method effectively enhances THz image contrast and edge extraction, as validated through experiments with various simulated targets.
APPLIED SCIENCES-BASEL
(2021)
Review
Green & Sustainable Science & Technology
Seok Kim, Do Hyeog Kim, Wonpyo Kim, Young Tae Cho, Nicholas X. Fang
Summary: The use of microreactors in continuous fluidic systems has expanded rapidly in the past three decades. Advances in materials science and engineering have accelerated the development of microreactor technology for critical roles in chemical, biological, and energy applications. The emerging paradigm of digital additive manufacturing has broadened material flexibility, innovative structural design, and new functionality in conventional microreactor systems.
INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING-GREEN TECHNOLOGY
(2021)
Review
Materials Science, Multidisciplinary
Seyed Mahdi Hashemi, Soroush Parvizi, Haniyeh Baghbanijavid, Alvin T. L. Tan, Mohammadreza Nematollahi, Ali Ramazani, Nicholas X. Fang, Mohammad Elahinia
Summary: This review discusses multi-scale integrated computational modeling and data-driven methods in additive manufacturing (AM) of metallic materials in the framework of integrated computational materials engineering (ICME). It elaborates on process simulation, structure modeling, property simulation, and integrated modeling, as well as a data-driven framework that has great potential for completing PSPP linkages.
INTERNATIONAL MATERIALS REVIEWS
(2022)
Article
Multidisciplinary Sciences
Kunhao Yu, Zhangzhengrong Feng, Haixu Du, An Xin, Kyung Hoon Lee, Ketian Li, Yipin Su, Qiming Wang, Nicholas X. Fang, Chiara Daraio
Summary: The study achieved hybrid materials that use photosynthesis of embedded chloroplasts to remodel microstructures, enhancing mechanical properties and enabling 3D printing of functional structures. The remodeling behavior can be suspended by freezing chloroplasts, regulated by mechanical preloads, and reversed by environmental cues.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Optics
Iksung Kang, Subeen Pang, Qihang Zhang, Nicholas Fang, George Barbastathis
Summary: Scattering exacerbates inverse problems, but a dynamic machine learning approach can reveal transparent images through scattering media.
Article
Engineering, Biomedical
Lei Zhang, Wenhan Lee, Xinhao Li, Yanhui Jiang, Nicholas Xuanlai Fang, Guohao Dai, Yongmin Liu
Summary: This study demonstrates the use of Direct Ink Writing (DIW) to create hydrogel meta-structures at room temperature. The method allows for the integration of various characteristics, such as large specific surface areas, interconnected porous structures, mechanical toughness, biocompatibility, and water absorption and retention capabilities. The meta-structures are printed without sacrificial materials or heating extrusion, and exhibit little lateral expansion and high compressive energy absorbance when subjected to external forces.
BIOACTIVE MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Nihar Ranjan Sahoo, Saurabh Dixit, Anuj Kumar Singh, Sang Hoon Nam, Nicholas X. Fang, Anshuman Kumar
Summary: This study investigates the mid-IR optical response of sub-wavelength thin films of alpha-phase molybdenum trioxide for potential high temperature applications. It is found that the alpha-MoO3 based polarizer maintains a high extinction ratio even at temperatures up to 140 degrees C. This research opens up new possibilities for sub-wavelength IR optical components without the need for lithographic constraints.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Chemistry, Physical
Chang Liu, Qikai Li, Sijia Wang, Weishu Liu, Nicholas X. Fang, Shien-Ping Feng
Summary: The research frontier of harvesting low-grade heat as a source of electrical power for self-powered wearable devices has shown promise, but current attainable thermopowers and constraints of rigid or complicated thermoelectric systems have hindered progress. By assembling porous electrodes and hybrid hydrogel, an ultrahigh thermopower of 19.32 mV K-1 was achieved on a stretchable thermoelectric module. This design provides an effective strategy to increase thermopower by regulating ion transport, resulting in high output power density, tailorable architecture, and excellent stretchability showcased in a thermoelectric wristband for body heat recovery.
Article
Physics, Applied
Michael Y. Wang, Mythili Thevamaran, Michael Sabatini Mattei, Brandon G. Hacha, Gerardo Andres Mazzei Capote, Zongfu Yu, Tim Osswald, Randall H. Goldsmith, Dan J. Thoma, Chu Ma
Summary: In this study, we report an underwater acoustic topological waveguide that operates in a new frequency range. The existence of edge states in the waveguide was demonstrated both numerically and experimentally. This research has potential applications in underwater/biomedical sensing, energy transport, and acoustofluidics.
APPLIED PHYSICS LETTERS
(2022)
Article
Energy & Fuels
Seok Kim, Sang-Hoon Nam, Seokho Kim, Young Tae Cho, Nicholas X. Fang
Summary: This study presents the fabrication and characterization of hollow ceramic microlattices with low heat capacity and high specific surface area. The microlattices were prepared using digital light three-dimensional printing and demonstrated promising performance for various energy applications. The unique design of the microlattices, including a small Biot number and large intertwined surface area, enables homogeneous flow mixing and chemical reactions.
Article
Multidisciplinary Sciences
Hongxia Li, Aikifa Raza, Shaojun Yuan, Faisal AlMarzooqi, Nicholas X. Fang, TieJun Zhang
Summary: This study presents a membrane-on-chip device with a fish gill structure integrated through micro-stereolithography 3D printing, showcasing self-sealing and anti-fouling properties for wastewater filtration. The biomimetic filtration devices exhibit significantly longer durability for high-flux filtration.
SCIENTIFIC REPORTS
(2022)
Article
Physics, Applied
Jinuan Lin, Chu Ma
Summary: This work presents a blind structured illumination microscopy (blind-SIM) system that achieves subwavelength resolution in acoustic far-field imaging. The system generates acoustic structured illuminations (SI) using a randomly located subwavelength diffraction grating, converting evanescent waves to propagating waves. The object's image is reconstructed using a joint-sparsity compressive sensing algorithm, reducing the hardware complexity compared to existing technologies. This system has potential in improving the practicality of acoustic far-field subwavelength imaging in various applications.
PHYSICAL REVIEW APPLIED
(2022)
Article
Nanoscience & Nanotechnology
Xiaoyi She, Huifeng Du, Yang Shen, Nicholas X. Fang, Chongjun Jin
Summary: This paper introduces a method based on optical microscopy to visualize the hydrogenation process of palladium in real-time. By using a fast-response mechanical platform and self-organized ordered wrinkles, hydrogen diffusion can be transformed into optical contrast, enabling the monitoring of hydrogenation kinetics inside palladium. This method is crucial for energy storage and hydrogen detection.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
J. Carbajo, J. M. Molina, S. Kim, L. P. Maiorano, S. Ghaffari Mosanenzadeh, N. X. Fang
Summary: This paper proposes the design of open-pore polymer and aluminum cellular materials for sound absorption. These materials, fabricated using additive manufacturing and the replication method, show potential as sound absorbers.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
Jinhu Zhang, Tianye Zhang, Erqian Dong, Chuang Zhang, Zhonglu Lin, Zhongchang Song, Hongquan Li, Nicholas X. Fang, Yu Zhang
Summary: The uniqueness of soft materials such as hydrogels creates great potential for new soft robots and actuators. Researchers have developed a bioinspired hydrogel jellyfish that is acoustically transparent and exhibits flexible motion, laying the foundation for the construction of next-generation mechanically flexible and acoustically transparent robots.
CELL REPORTS PHYSICAL SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Chang Liu, Sijia Wang, Xun Wang, Jianjun Mao, Yue Chen, Nicholas X. Fang, Shien-Ping Feng
Summary: Hydrovoltaic technologies have attracted attention in recent years as a way to generate electricity through the interaction of water with nanostructured materials. A new hydrovoltaic device has been invented that can sustainably produce ultrahigh voltages and has a fast voltage response. It outperforms other moisture-enabled electric generators in power density, adaptability to moisture flow, and simplicity of the device. The device has practical significance as a portable power supply and can recover energy from various real-life scenarios.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
