Article
Physics, Applied
Ataollah Kalantari Osgouei, Hodjat Hajian, Andriy E. Serebryannikov, Ekmel Ozbay
Summary: The study introduces a multi-band nearly perfect light absorber with dual narrowband absorption responses and one broadband absorption response, primarily applied in sensing, photovoltaic, and thermal emission fields. The dual narrowband and broadband responses are achieved by the combination of optical responses of gold and ITO.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Jun Chen, Feng Tang, Xiangxian Wang, Jingjun Wu, Yiman Wu, Xin Ye, Yiqun Wang, Liming Yang
Summary: A novel model for a high-efficiency tunable broadband near-infrared absorber is proposed in this paper, achieving tuning of absorption efficiency and band by regulating temperature. The absorber utilizes MoS2 and VO2 materials to achieve high absorption rates in different wavelength ranges at different temperatures.
RESULTS IN PHYSICS
(2021)
Review
Nanoscience & Nanotechnology
Yu Yao, Jin Zhou, Zhengqi Liu, Xiaoshan Liu, Guolan Fu, Guiqiang Liu
Summary: Metamaterial light absorbers have gained significant attention for their absorption efficiency and wide range of applications, but traditional noble metals based absorbers can suffer from structural damage due to local high temperatures. Intensive research has focused on developing absorbers that can maintain efficient light absorption and structural stability at high temperatures. Refractory materials are seen as key to providing robust thermal stability and high performance for light absorption.
Article
Engineering, Electrical & Electronic
Mehdi Askari
Summary: This paper introduces a new metamaterial structure that can perfectly absorb electromagnetic waves in a narrow frequency band in the near infrared region, and evaluates its potential applications as a sensitive refractive-index-based sensor, with high sensitivity and figure of merit values. The detailed discussion on its application for hemoglobin concentration detection further demonstrates its versatility and usefulness in various scenarios.
OPTICAL AND QUANTUM ELECTRONICS
(2021)
Article
Materials Science, Multidisciplinary
Hongyu Ren, Qianyi Shangguan, Zijun Song, Yong Zhao, Zao Yi, Guolu Ma, Jianguo Zhang, Hua Yang, Shifa Wang, Pinghui Wu
Summary: This paper presents a graphene metamaterial absorber based on impedance matching, which achieves a theoretically perfect absorption in the mid-infrared band. The designed absorber is capable of multiband stable high absorption and maintains excellent performance in a wide incident angle range. The results indicate that the graphene absorber has potential applications in biosensing, photodetection, and photocell fields.
Article
Chemistry, Multidisciplinary
Joel Y. Y. Loh, Mahdi Safari, Chengliang Mao, Camilo J. Viasus, George Eleftheriades, Geoffrey A. Ozin, Nazir P. Kherani
Summary: Metamaterials are synthetic structures that achieve efficient light absorption by manipulating refractive index, and enhance catalytic reaction rates through intricate optical and plasmonic resonance processes. Compared to nanoparticles or films, metamaterial catalysts exhibit superior photocatalytic performance.
Article
Chemistry, Multidisciplinary
Jin Hu, Kang Xu, Peilin Huang, Min Wang, Shaolin Xu, Qi-Huo Wei
Summary: Wideband perfect absorbers are in high demand for applications such as efficient photodetection and radiation cooling. This study introduces a novel hierarchical conical metasurface that achieves perfect absorption from visible to far-infrared wavelengths through surface-engraved nanogratings on microcones. The underlying mechanisms, including surface phonon polaritons and light trapping, are examined. This technology shows significant promise for applications in photodetectors.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Jiahao Ge, Yaqiang Zhang, Hongxing Dong, Long Zhang
Summary: This study proposes a nanolayered terahertz metasurface with switchable functionality between absorption and transmission. The switchable performances are achieved through the electrical tunability of graphene and the insulator-metal transition in vanadium dioxide (VO2). When VO2 functions as a metal, the metasurface acts as a quad-band perfect absorber, and when VO2 is in an insulating state, it functions as a THz antireflection coating. The physical mechanisms behind these functionalities are analyzed using a theoretical interference model, and the metasurface is shown to be insensitive to light polarization and angle of incidence. This research has significant implications for the development of switchable metadevices in the THz regime.
ACS APPLIED NANO MATERIALS
(2022)
Article
Engineering, Multidisciplinary
Liyun Cao, Yifan Zhu, Sheng Wan, Yi Zeng, Badreddine Assouar
Summary: This study presents a non-Hermitian loss-modulation beam and plate model based on complex wavenumber plane for designing lossy elastic metamaterials. The high-performance absorption of the metamaterial is achieved through a combination of dissipation-radiation balance and multiple reflections. The study provides a new approach for broadband low-frequency vibration suppression and offers an effective paradigm for wave engineering in non-Hermitian elastic wave systems.
INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Bin Tang, Neigang Yang, Xianglian Song, Gui Jin, Jiangbin Su
Summary: This study proposes an anisotropic perfect metamaterial absorber in visible frequencies, utilizing a multi-layered alpha-MoO3 nanoribbon/dielectric structure stacked on a silver substrate. Electromagnetic simulations show that triple-band perfect absorption can be achieved for polarization along [100] and [001] in the direction of alpha-MoO3 when the absorber is composed of three alpha-MoO3 nanoribbon/dielectric layers.
Article
Multidisciplinary Sciences
Heng Wang, Qibo Mao
Summary: This study presents a new type of deep subwavelength acoustic metamaterial absorber with 100% ventilation, utilizing coiled resonators for efficient sound absorption and transmission loss performance in a narrow frequency band. Experimental results show good performance and potential application in duct noise control.
Review
Physics, Applied
Xin Luo, Yuanguo Zhou, Yijun Cai, Ziqiang Cheng, Zhimin Liu, Wenqiang Wan
Summary: Due to their unique properties, two-dimensional (2D) materials have attracted extensive attention. However, the low optical absorption efficiencies of most 2D materials limit their applications in optoelectronic devices. Enhancing the light-matter interaction of 2D materials in the visible and near-infrared regimes has become a key topic. This topical review summarizes the recent developments of 2D materials-based optical absorbers, focusing on the methods and physical mechanisms of different types of perfect absorbers.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Review
Computer Science, Information Systems
Majid Amiri, Farzad Tofigh, Negin Shariati, Justin Lipman, Mehran Abolhasan
Summary: Future IoT devices are expected to be fully ubiquitous and autonomous, requiring completely wireless operation and accurate sensing. Metamaterial perfect absorbers (MPAs) have the potential to improve efficiency and applications of IoT devices.
IEEE INTERNET OF THINGS JOURNAL
(2021)
Article
Materials Science, Multidisciplinary
David Dang, Aleksei Anopchenko, Sudip Gurung, Zoey Liu, Xuguo Zhou, Ho Wai Howard Lee
Summary: By constructing multilayer ENZ thin films, broadband ENZ properties and perfect absorption can be achieved. This work utilizes a residual generative neural network to optimize the broadband and perfect absorption properties of ultrathin ENZ materials, resulting in multi-stack ENZ layers with a maximum absorption above 99% over a bandwidth hundreds of nanometers wide.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
Zhengjie Guo, Xiaoyu Liu, Caixia Li, Jiefeng Li, Haotian Cai, Ming Fu, Dawei He, Yongsheng Wang
Summary: Broadband optical absorbers are essential for various applications such as solar energy harvesting, thermal emitters, and infrared detection. Metallic truncated nanocones demonstrated ultra-broadband absorption in the UV-visible-NIR spectral region, with an average absorptivity of 96.11% and continuous high absorptivity in a wide wavelength range. The interaction of different resonances in the truncated nanocones contributes to the high absorption performance, with potential for practical applications and fabrication feasibility.
Article
Engineering, Electrical & Electronic
Kebin Fan, John Koulakisf, Karoly Holczer, Seth Putterman, Willie J. Padilla
JOURNAL OF INFRARED MILLIMETER AND TERAHERTZ WAVES
(2020)
Article
Physics, Applied
Jingbo Wu, Ze Shen, Shijun Ge, Benwen Chen, Zhixiong Shen, Taofeng Wang, Caihong Zhang, Wei Hu, Kebin Fan, Willie Padilla, Yanqing Lu, Biaobing Jin, Jian Chen, Peiheng Wu
APPLIED PHYSICS LETTERS
(2020)
Article
Multidisciplinary Sciences
Andrew E. Cardin, Sinhara R. Silva, Shai R. Vardeny, Willie J. Padilla, Avadh Saxena, Antoinette J. Taylor, Wilton J. M. Kort-Kamp, Hou-Tong Chen, Diego A. R. Dalvit, Abul K. Azad
NATURE COMMUNICATIONS
(2020)
Article
Optics
Yang Deng, Simiao Ren, Kebin Fan, Jordan M. Malof, Willie J. Padilla
Summary: All-dielectric metasurfaces exhibit exotic electromagnetic responses similar to metal-based metamaterials. While machine learning has shown impressive results in design, finding the geometry that produces the desired spectra remains a challenging task. A method has been proposed to accurately solve ill-posed inverse problems, with a specific example demonstrated in finding the metasurface geometry matching the external quantum efficiency of gallium antimonide.
Article
Optics
Kebin Fan, Ilya Shadrivov, Andrey E. Miroshnichenko, Willie J. Padilla
Summary: The article discusses the necessary polarizability requirements to achieve Kerker conditions in all-dielectric metasurfaces, demonstrating invisibility and perfect absorption phenomena, and provides a method for studying exotic electromagnetic phenomena through switching between states by modifying resonator height.
Article
Chemistry, Multidisciplinary
Haoming Fang, Wanrong Xie, Xiuqiang Li, Kebin Fan, Yi-Ting Lai, Bowen Sun, Shulin Bai, Willie J. Padilla, Po-Chun Hsu
Summary: Thermal management is crucial for sustainable development, and radiative heat management can control heat transfer by the surface. Developing dynamic and universal radiative heat management devices is challenging due to the different tuning strategies required for various object emissivities. By utilizing a surface-textured infrared-semiabsorbing elastomer with a metallic back reflector, an innovative triple-mode midinfrared modulator has been demonstrated, providing high performance and a new design paradigm for radiation heat regulation in wearable, robotics, and camouflage technologies.
Review
Chemistry, Multidisciplinary
Omar Khatib, Simiao Ren, Jordan Malof, Willie J. Padilla
Summary: Deep neural networks have revolutionized traditional research methods and are driving scientific discovery, especially in the field of artificial electromagnetic materials. Despite the great potential of deep learning for future research in artificial electromagnetic materials, there are still limitations that need to be addressed.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Optics
Omar Khatib, Talmage Tyler, Willie J. Padilla, Nan M. Jokerst, Henry O. Everitt
Summary: This study demonstrates a simple imaging technique using a passive terahertz metamaterial with tailored polarization to map local strains in composite structures without the need for a reference spectral map. Only two orthogonal polarizations and a few frequencies are required to measure the strong terahertz response, allowing rapid and quantitative mapping of local strain environments over large areas.
Article
Materials Science, Multidisciplinary
Omar Khatib, Simiao Ren, Jordan Malof, Willie J. Padilla
Summary: Deep neural networks have the ability to learn internal representations of the input, but their workings are often unknown. By incorporating a Lorentz layer, causality can be enforced, allowing the neural network to learn the physics of metasurfaces.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Physics, Applied
Kebin Fan, Vincent Stenger, W. J. Padilla
Summary: We demonstrate a multi-functional metamaterial absorber capable of efficiently detecting millimeter wave radiation at room temperature. By integrating a pyroelectric crystal directly within the metamaterial unit cell, we create an efficient large area sensing element composed of repeating unit cells that are approximately ten times smaller than the operational wavelength. The experimental results show that the monolithic pyroelectric metamaterial geometry functions well as a detector and can serve as an ideal device platform for compact room temperature millimeter wave sensing and imaging components.
APPLIED PHYSICS LETTERS
(2022)
Review
Nanoscience & Nanotechnology
Kebin Fan, Richard D. Averitt, Willie J. Padilla
Summary: Metamaterials enable subwavelength tailoring of light-matter interactions, driving fundamental discoveries and applications in various fields. By incorporating responsive materials into metamaterials, dynamic properties can be achieved, leading to the development of active and tunable devices. Active control can be achieved by modifying the electronic or optical properties of the responsive materials, allowing for reconfigurable or real-time control of light. The wide range of examples presented in this field showcases the potential impact of active and tunable nanophotonic metamaterials in areas such as holography, communications, imaging, and quantum sensing.
Editorial Material
Physics, Applied
Isabelle Staude, Houtong Chen, Andrey Miroshnichenko, Junichi Takahara, Willie J. Padilla
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Nanoscience & Nanotechnology
Yang Deng, Simiao Ren, Jordan Malof, Willie J. Padilla
Summary: Deep learning has been widely applied to solve inverse problems in artificial electromagnetic materials (AEMs). Deep inverse models have achieved impressive results surpassing capabilities of other approaches. This article provides an overview of the process, discusses important issues, and presents an outlook for future development in this field.
PHOTONICS AND NANOSTRUCTURES-FUNDAMENTALS AND APPLICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Simiao Ren, Ashwin Mahendra, Omar Khatib, Yang Deng, Willie J. Padilla, Jordan M. Malof
Summary: In this study, the use of deep inverse models (DIMs) for designing artificial electromagnetic materials (AEMs) is investigated. The results show that DIMs can rapidly produce accurate designs to achieve desired scattering properties in AEM design problems, although no single model consistently performs best. The Neural-Adjoint approach achieves the best overall performance across all problem settings. It is also found that conventional deep neural networks can outperform DIMs in some AEM design problems that are not ill-posed.
Review
Physics, Applied
Willie J. Padilla, Richard D. Averitt
Summary: Metamaterials enable precise control of light-matter interactions at the subwavelength scale, accessing a full range of electromagnetic responses and fueling fundamental research with numerous potential applications. Imaging, leveraging metamaterials' ability to achieve arbitrary, specific and tunable scattering responses, is at the forefront of these developments and integrates with various materials and devices for applications across the electromagnetic spectrum.
NATURE REVIEWS PHYSICS
(2022)
