Review
Materials Science, Multidisciplinary
Chuanxin Chen, Minqi Chai, Meihua Jin, Tao He
Summary: Terahertz metamaterial absorbers (TMAs) efficiently absorb electromagnetic waves in the range of 0.1-10 THz, achieving perfect absorption and broad band absorption. Their ultra-thin design and tunable electromagnetic properties make them highly valuable in communication, imaging, detection, and security inspection applications.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Physics, Applied
Xiao Xiang, Hongxing Tian, Yingzhou Huang, Xiaoxiao Wu, Weijia Wen
Summary: Overcoming the inherent limitations of acoustic metamaterials has become a significant issue in the field of acoustic metamaterial engineering. The proposal of a manually tunable ventilated sound absorber that can be adjusted in a wide range after manufacture, ensuring both high-performance absorption and ventilation, shows potential for application in complex pipe systems requiring frequency adjustment.
APPLIED PHYSICS LETTERS
(2021)
Article
Optics
Azadeh Didari Bader, Hamed Saghaei
Summary: In this work, we propose two different graphene-covered nanostructured metamaterial absorbers inspired by Penrose tiling. These absorbers enable spectrally tunable absorption within the terahertz spectrum. The tunability of these absorbers is determined through finite-difference time-domain analyses. The findings show the high tunability of both models through varying graphene's Fermi level, thickness, substrate's refractive index, and proposed structures' polarization. Multiple tunable absorption profiles are observed, which may find applications in designer infrared absorbers, optoelectronic devices, and THz sensors.
Article
Optics
Fulong Yang, Chenyang Zhang, Aihua Zhang, Xiaoqing Zhu, Huan Xu, Dayu Wang
Summary: This paper proposes a thermally tunable broadband metamaterial absorber based on ionic liquids at the microwave band, which exhibits distinct modulation characteristics in different frequency bands. Numerical simulations demonstrate that the absorption decreases with temperature in the low-frequency band and increases in the high-frequency band. The absorber shows good broadband absorption even without a metal substrate. Experimental results confirm the validity of the proposed structure. The simple design and wide frequency tuning range of the absorber suggest great potential applications in sensors, detection, and frequency-selective thermal emitters.
Article
Optics
Hui Mei, Wenqiang Yang, Dou Yang, Li Yao, Yongtao Yao, Chao Chen, Laifei Cheng
Summary: The recent utilization of metamaterial design has prompted a new stage of research on electromagnetic metamaterial absorbers (EMMAs), enabling integration of structure and function. Progress is focused on summarizing developments in structural design, absorbing performance, fabrication methods, and EMMA mechanisms. Future studies are expected to focus on shortcomings in current research and developing trends.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Optics
Yu Zhou, Zheng Qin, Zhongzhu Liang, Dejia Meng, Haiyang Xu, David R. Smith, Yichun Liu
Summary: Broadband metamaterial absorbers with high absorption, ultrathin thickness and easy configurations are researched and demonstrated in this paper, paving the way for enhancing the optical performance in applications of infrared thermal emitters, imaging and photodetectors.
LIGHT-SCIENCE & APPLICATIONS
(2021)
Article
Multidisciplinary Sciences
Feifei Ren, Jinxin Gu, Hang Wei, Gaoping Xu, Jiupeng Zhao, Shuliang Dou, Yao Li
Summary: In this study, four switchable infrared metamaterial absorbers/emitters were proposed using Ag/VO2 disks on the Ag plane with different unit cells. The absorption peaks occurred at around 4 μm after optimization of the structure when VO2 is in insulating state, and disappeared when it became metallic state. The absorbers/emitters show stable performance under different incident angles due to their high rotational symmetric structure, indicating promising applications in sensing technology and adaptive infrared systems.
Article
Physics, Applied
Zhonglei Shen, Shengnan Li, Yafei Xu, Wei Yin, Liuyang Zhang, Xuefeng Chen
Summary: Researchers have proposed a stereoscopic multilayered ultrabroadband THz metamaterial absorber utilizing 3D printing technique to overcome the fabrication complexities of traditional multistep photolithography processes. The feasibility of the proposed fabrication method for common out-of-plane THz narrowband absorbers has been validated, and the absorption capacities of the 3D printed absorbers are numerically and experimentally explained. These findings offer an efficient concept and fabrication technique for potential applications in emerging THz technologies, such as sensing, imaging, and wireless communications.
PHYSICAL REVIEW APPLIED
(2021)
Article
Materials Science, Multidisciplinary
Fuming Yang, Zhongzhu Liang, Xiaoyan Shi, Xiqing Zhang, Dejia Meng, Rui Dai, Shoutao Zhang, Yan Jia, Ningte Yan, Sixuan Li, Zihan Wang
Summary: Broadband metamaterial absorbers are crucial in LWIR detection. Instead of using metallic resonators, we propose two absorbers that utilize dielectric resonators, achieving a higher absorptivity in the 8-14 μm range. By replacing metal with germanium (Ge) resonators, we achieved a broadband absorption with an average absorptivity of 93.1%. To enhance the absorptivity further, we inserted a Si3N4 layer into the Ge layer, increasing the absorption bandwidth to 7.96-14.16 μm with an average absorptivity of 96.5%. Compared to metallic resonators, dielectric resonators make fabrication easier.
RESULTS IN PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Amir Ghobadi, Turkan Gamze Ulusoy Ghobadi, Ekmel Ozbay
Summary: Although nanofabrication has advanced, scalability and repeatability issues limit large-scale applications. Lithography-free metamaterial absorbers (LFMAs) offer a potential solution for upscaling designs.
OPTICAL MATERIALS EXPRESS
(2022)
Article
Chemistry, Physical
Pengfei Sun, Hengli Feng, Lijing Su, Sihan Nie, Xin Li, Yaxin Zhou, Lingling Ran, Yang Gao
Summary: In this paper, we present a solar absorber based on the Si3N4-W-Ti-SiO2 insulator-metal-insulator structure and demonstrate its performance using the finite difference time domain (FDTD) method. The absorber shows an absorption rate of over 90% in the wavelength range of 500 nm to 2995 nm, with an average absorption rate of 98.3%. The high absorptivity is attributed to the interaction of propagating surface plasmon resonance and local surface plasma resonance. The effects of different structural parameters and the angle of incidence are discussed.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Qianqian Huang, Gehuan Wang, Ming Zhou, Jing Zheng, Shaolong Tang, Guangbin Ji
Summary: Metamaterials are artificial composite structures with supernormal physical properties that allow effective manipulation of electromagnetic waves. One important application is metamaterial absorbers, which achieve perfect absorption through reasonable design. This review focuses on bionic design, new artificial design, and the use of 3D printing technology to prepare metamaterial absorbers.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Physical
Chenxu Zhao, Huan Wang, Yanyan Bu, Hui Zou, Xiangfu Wang
Summary: This paper introduces the absorption mechanism and design directions of metamaterial perfect absorbers (MPAs), highlighting equivalent impedance matching, plasma resonance, and interference effect as the main absorption mechanisms. The design aspects of MPAs include multiband absorption, ultra-wideband and ultra-narrowband absorption, polarization and angle insensitive absorption, and dynamically controllable tunable absorption.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
M. Abdel-Rahman, M. Hezam, A. A. Odebowale, N. Alkhalli, M. Alduraibi
Summary: In this study, a novel ultra-thin film alloy of Titanium-Niobium (TiNb) was synthesized using sputter deposition and evaluated for its effectiveness as an absorber for LWIR microbolometers. The TiNb thin film exhibited higher absorptance in the LWIR band across a wider range of cavity air gap thicknesses compared to commonly used absorbers, NiCr and Ti. This work demonstrates that TiNb thin films, previously not considered as IR absorbers, can serve as effective absorbers for LWIR microbolometers.
Article
Engineering, Environmental
Xiao Liu, Gengping Wan, Lihong Wu, Jun Liu, Shaohua Shi, Qiyi Wei, Guizhen Wang
Summary: A TPOP-Ti3C2/Ni2P composite material with excellent antioxidative microwave absorption and photothermal properties was synthesized. TPOP on the MXene surface serves as both an antioxidative stabilizer and a capping agent, improving its hydrophobicity and chemical stability. The composite film's microwave absorption performance remains basically unchanged, regardless of repeated bending or exposure under harsh sunlight. This study provides a new strategy for manufacturing microwave absorbers with efficient photothermal properties for possible application in designing wearable devices that combine electromagnetic protection and self-generated heat.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Hong Liu, Chao Xu, Qundong Xia, Yunbin Ying, Qiang Li, Xiaoyu Zhao, Yongjun Zhang, Shikuan Yang
Summary: In this study, a new type of structural color material is reported, which is achieved by filling polystyrene nanospheres into silver brochosomes. The color is originated from the enhanced electromagnetic resonances of the polystyrene nanospheres by the surrounding metallic nanobowls. The color can be modified by tuning the diameter of the polystyrene nanospheres through plasma etching treatment. This material exhibits promising applications in the field of structural colors due to its simple fabrication process and easy processability.
Article
Optics
Ni Tang, Jiyong Wang, Baofeng Zhang, Hao Chen, Min Qiu
Summary: To meet the requirements of high brightness color displays and high signal-to-noise ratio camera sensors, adding a white subpixel to the traditional red, green, and blue subpixels is necessary. Conventional RGB to RGBW conversion algorithms face issues like reduced chroma of highly saturated colors and complicated coordinate transformations between RGB and CIE color spaces. In this study, a complete set of RGBW algorithms was developed to digitally code colors in CIE-based color spaces, eliminating the need for complex processes such as color space transformations and white balancing. The algorithm enables accurate manipulations of digital colors for RGBW sensors and displays.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION
(2023)
Article
Engineering, Electrical & Electronic
Jinyu Guo, Tao Liu, Shuoqiu Tian, Wentao Yuan, Rui Zheng, Shan Wu, Ding Zhao, Yifang Chen, Min Qiu
Summary: This paper presents a new design of metallic cross annular hole array for developing optical filters in the mid-infrared band of 4-10 μm. The effects of structural dimensions on filtering performance were investigated through numerical simulations and optical characterizations. By using a thick Au film and ice lithography, the problem of low spectral resolution was tackled and high performance filters with dense elements in an array were successfully fabricated.
MICROELECTRONIC ENGINEERING
(2023)
Article
Optics
Jianghui Liu, Qiang Li, Junbo Liu, Song Hu, Chunchao Qi
Summary: In this work, a structure-illumination based wafer focus measuring system (SI-WFMS) was proposed, which can measure the vertical defocus distance of the exposure area with less than 0.06 μm error in a single-step sampling process. The SI-WFMS can also rapidly measure the surface profile and tilt angle of the wafer, saving measuring time and improving manufacturing efficiency.
OPTICS AND LASERS IN ENGINEERING
(2023)
Article
Physics, Applied
Wei Lyu, Weiwei Tang, Wei Yan, Min Qiu
Summary: It has been reported that nanosecond light pulses can generate elastic waves to drive nanomotion of micro-objects on frictional solid interfaces. In this paper, a comprehensive theoretical analysis is presented to clarify the physics behind this technique. The results reveal the essential factors: the use of short light pulses for rapid thermal expansion and the timescale asymmetry in thermal heating and cooling. The insights gained from this analysis could be applied to micro- and nanoscale optical waveguides and offer theoretical guidelines for optical manipulation on solid interfaces with light-induced elastic waves.
PHYSICAL REVIEW APPLIED
(2023)
Article
Chemistry, Multidisciplinary
Jianbo Yu, Rui Qin, Yunbin Ying, Min Qiu, Qiang Li
Summary: This study presents a general strategy for achieving asymmetric directional thermal emission in reciprocal systems, and demonstrates its effectiveness experimentally. This has significant implications for the development of ultrathin customized thermal sources and other thermal-engineering applications.
ADVANCED MATERIALS
(2023)
Article
Optics
Yining Zhu, Wenjuan Wang, Yiwei Zhou, Rui Qin, Bing Qin, Tianze Zhou, Min Qiu, Qiang Li
Summary: Personal thermal management is a topic of growing interest due to climate anomalies and the focus on physical health. A colored textile based on woven cloth is developed, which has superior passive radiative heating capability while maintaining aesthetics. By coating infrared transparent inorganic nanoparticles on MXene-decorated cotton, the textile achieves desired color, high near-infrared absorptivity, low mid-infrared emissivity, and wearability. Thermal tests demonstrate significant temperature increases compared to pure cottons, making this textile suitable for energy conservation and multi-spectral camouflage.
LASER & PHOTONICS REVIEWS
(2023)
Article
Optics
Yunbin Ying, Jianbo Yu, Bing Qin, Meng Zhao, Tianze Zhou, Weidong Shen, Min Qiu, Qiang Li
Summary: This paper introduces a strategy for achieving ultra-broadband directional thermal emission matching the atmospheric window by combining Fabry-Perot resonances and the Brewster effect. The planar system exhibits high p-polarized emissivity at specific directions covering the entire atmospheric window and high omnidirectional emission in the non-atmospheric window for simultaneous efficient radiative cooling. It also has the capability for information encryption and anti-snooping in the infrared range.
LASER & PHOTONICS REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Sergei Li, Binze Ma, Qiang Li, Mikhail V. Rybin
Summary: The utilization of photonic bound states in the continuum(BIC) is a promising approach for various applications requiring efficient resonators. By perturbing the system with an asymmetry parameter, high-Q modes related to symmetry-protected BIC can be formed, with smaller asymmetry leading to larger Q factors. However, fabrication imperfections hinder precise control of the Q factor through the asymmetry parameter. In this study, we propose an antenna-based design of metasurfaces that enables accurate tailoring of the Q factor, while using equipment with lower tolerance for fabrication.
Article
Optics
Lei Zhang, Xinyu Sun, Hongyan Yu, Niping Deng, Feng Qiu, Jiyong Wang, Min Qiu
Summary: In this study, a compact electro-optic modulator is integrated on the endfaces of a single-mode optical fiber jumper for fast amplitude modulations. It utilizes ultrathin and high quality-factor plasmonic metasurfaces, nanofabrication-friendly and highly efficient EO polymers, and coupling-free connections with fiber networks. The modulator allows dual-band operations and high-speed modulations.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Optics
Bing Qin, Yining Zhu, Yiwei Zhou, Min Qiu, Qiang Li
Summary: This paper proposes a multilayer wavelength-selective emitter that achieves effective camouflage across the entire infrared spectrum, and provides a comprehensive guideline for developing multiband camouflage compatible with radiative heat dissipation.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Yong Wang, Yunlong Li, Jiao Geng, Zhiming Hu, Fengjiang Liu, Liping Shi, Jiu-an Lv, Min Qiu
Summary: This study reports a method of constructing cross-linked liquid crystal polymer microstructures using femtosecond laser direct writing (FsLDW) and systematically investigates their light-driven behaviors. The arbitrary pattern machining of microstructures is achieved through optimization of processing parameters, and a micromirror system capable of controllable swing and rotation is demonstrated.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Optics
Yining Zhu, Yiwei Zhou, Bing Qin, Rui Qin, Min Qiu, Qiang Li
Summary: A nanophotonic-based night-time warming strategy is proposed, which passively inhibits thermal radiation of objects while actively harnessing that of atmosphere. By using a photonic-engineered thin film, it achieves significant temperature rise and low heat loss.
LIGHT-SCIENCE & APPLICATIONS
(2023)
