Article
Materials Science, Multidisciplinary
Yadgar I. Abdulkarim, Halgurd N. Awl, Fatih Ozkan Alkurt, Fahmi F. Muhammadsharif, Salah Raza Saeed, Muharrem Karaaslan, Mehmet Bakir, Heng Luo
Summary: This paper presents a square-shaped water metamaterial as a perfect absorber for ultra-broadband absorption in the microwave frequency range. Numerical investigation using CST and fabrication through 3D printing technology were conducted. Results show high absorption and thermal stability.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Multidisciplinary Sciences
Tse-An Chen, Meng-Ju Yub, Yu-Jung Lu, Ta-Jen Yen
Summary: This study demonstrates a non-resonant perfect absorber comprised of alternating layers of magnesium fluoride and chromium, which can efficiently absorb light in a broad wavelength range, with advantages of simplified manufacturing process, polarization independence, and wide incidence angle.
SCIENTIFIC REPORTS
(2021)
Article
Materials Science, Multidisciplinary
Zian Li, Hui Xia, Yuefeng Zhao, Wentao Lei, Chenyang Zhao, Wenke Xie
Summary: This study designed a polarization-insensitive and absorption-tunable ultra-broadband terahertz metamaterial absorber. By analyzing the distribution of electric field and surface current, the mechanism of perfect absorption was explained. After optimizing the structural parameters, an average absorptance of 95.1% in the frequency range of 1.33 to 2.43 THz was achieved.
RESULTS IN PHYSICS
(2022)
Article
Materials Science, Composites
Tuo Zhang, Yuping Duan, Jiangyong Liu, Huifang Pang, Lingxi Huang, Xinran Ma, Yupeng Shi, Ben Ma
Summary: This study reports hierarchical metamaterials constructed from pyramid metastructure composites and Fibonacci spiral elements, with a wide effective absorption bandwidth. The use of multi-scale optimization and metastructure design is effective in improving multiple resonance thickness and wavefront transmission. The hybrid absorber exhibits robustness with incident angle across transverse magnetic polarization.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Huiyong Li, Chen Shen, Shuai Sun, Chun Li, Hui Zhang, Zhong Zhang
Summary: Researchers have developed a needle-like array structure (NAS) by spraying and self-assembling a magnetic composite ink under an external magnetic field. The NAS exhibits extremely low hemispherical reflectance (<= 0.3%) over a wide spectral range of 300-2000 nm and stable omnidirectional absorption (incident angle insensitivity up to 70 degrees), making it one of the darkest surfaces ever reported. The NAS shows outstanding photothermal conversion, self-cleaning performance, flexibility, and thermal-aging resistance, offering a promising alternative for constructing ultrablack surfaces for practical applications.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Automation & Control Systems
Nam Ha-Van, Yining Liu, Prasad Jayathurathnage, Constantin R. Simovski, Sergei A. Tretyakov
Summary: This article proposes a cylindrical-shaped coil that can generate a homogeneous magnetic field in a plane, enabling megahertz-range wireless power transfer. The coil consists of two helical windings to guide the current in opposite directions, and a single power source is used for excitation without any current amplitude or phase control circuits. The system efficiency is validated by experimental results, and the electromagnetic exposure is confirmed to meet safety regulations.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Chemistry, Multidisciplinary
Jing-Hao Wu, Yan-Long Meng, Yang Li, Yi Li, Yan-Song Li, Gui-Ming Pan, Juan Kang, Chun-Lian Zhan, Han Gao, Bo Hu, Shang-Zhong Jin
Summary: In this study, a center-aligned tandem nanopillar array based absorber for ultra-broadband solar energy harvesting was investigated. The absorber achieved high-efficiency and omnidirectional absorption by introducing the center-aligned tandem nanopillar array embedded in an Al2O3 dielectric layer. The absorber demonstrated strong absorption by adjusting the radii and heights of the nanopillars. The research proposed a potential absorber for applications in thermal photovoltaic systems, infrared detection, and isotropic absorption sensing, as well as providing a new approach to design high-efficiency absorbers in an ultrabroad wavelength range.
Article
Physics, Applied
Sung Bok Seo, Sanghee Nah, Muhammad Sajjad, Nirpendra Singh, Youngwook Shin, Younghyun Kim, Jaekyun Kim, Sangwan Sim
Summary: Anisotropic two-dimensional materials, such as layered rhenium disulfide (ReS2), hold promise for polarization-driven optoelectronic and photonic devices. This study demonstrates that the broadband optical anisotropy of few-layer ReS2 can be adjusted using ultrafast transient absorption microscopy, providing insights into carrier dynamics in anisotropic two-dimensional materials.
PHYSICAL REVIEW APPLIED
(2022)
Article
Chemistry, Physical
Chika Higashimura, Go Yumoto, Takumi Yamada, Tomoya Nakamura, Fuyuki Harata, Hideki Hirori, Atsushi Wakamiya, Yoshihiko Kanemitsu
Summary: Two-dimensional halide perovskites exhibit unique structural and optical properties due to the distortion of the perovskite structure by large organic molecular cations, resulting in stable excitons confined in the 2D layers. In this study, the temperature dependences of various properties of a specific 2D perovskite crystal were investigated. The findings suggest that the anomalous temperature dependence of the Urbach tail parameter is caused by a random distribution of spontaneous polarizations in the ferroelectric phase.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Optics
Qiansen Xie, Huajun Feng, Shangliang Wu, Xu Liu, Zhihai Xu
Summary: In this study, a thin device with large areas is demonstrated, showing strong omnidirectional absorption and wide-angle absorption. The device achieves a high absorption rate of up to 99% across the visible spectrum and has potential applications in solar thermophotovoltaics and vehicle LiDAR.
Article
Engineering, Electrical & Electronic
Ahmed S. Saadeldin, Amr M. Sayed, Adnan M. Amr, Menna O. Sayed, Mohamed Farhat O. Hameed, S. S. A. Obayya
Summary: An ultrathin and broadband metamaterial absorber with loaded four lumped resistors is proposed and analyzed in this study. The absorptivity is increased by simultaneously reducing the reflection and transmission coefficients. The proposed design utilizes continuous metallic ground to achieve zero transmission and matches the impedance with free space to reduce reflection. It demonstrates electric and magnetic resonances with perfect absorptivity. The suggested absorber exhibits high absorption over a wide frequency range and incident angle variation, making it suitable for applications in communications, stealth, and imaging fields.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Chemistry, Multidisciplinary
Maixia Fu, Jinyi Wang, Shaoshuai Guo, Zhaoying Wang, Pengxu Yang, Yingying Niu
Summary: A polarization-insensitive broadband terahertz absorber with a sandwich structure of metal-dielectric-graphene has been designed and simulated. The absorption performance is enhanced by altering the physical dimensions of the graphene pattern and actively adjusted by changing the chemical potential of graphene. The proposed absorber offers broad relative bandwidth, high absorption rate, polarization insensitivity, and a wide incident angle, making it potentially useful in terahertz technology applications such as imaging, detection, and cloaking.
Article
Materials Science, Multidisciplinary
Pei Ding, Mingyu Li, Ximin Tian, Yan Li, Li Shao, Kun Xu, Haibo Huo, Fanguang Zeng, Junqiao Wang
Summary: This paper proposes a metasurface carpet cloak based on graphene rings to achieve broadband, wide-angle, and full polarization stealth, demonstrating polarization-insensitive invisibility with a large working bandwidth of 45% and a wide angular span of +/- 40 degrees in the terahertz range. The sensitivity of cloaking performance to the shape of the carpet cloak is shown through comparisons with different cloak designs, suggesting inspiration for constructing other high-performance metasurface devices.
Article
Chemistry, Multidisciplinary
Jiajia Qian, Jun Zhou, Zheng Zhu, Zhenzhen Ge, Shuting Wu, Xiaoming Liu, Jian Yi
Summary: The polarization-insensitive broadband terahertz absorber based on single-layer graphene metasurface is designed to have over 90% absorptance up to 2 THz. By combining localized surface plasmon resonances on the graphene patches and resonances caused by their coupling, broadband absorption is achieved. The proposed absorber is completely insensitive to polarization and flexible in changing absorption bandwidth through varying chemical potential of graphene and structural parameters.
Article
Engineering, Electrical & Electronic
Shreyas Charola, Shobhit K. Patel, Juveriya Parmar, Rajendrasinh Jadeja
Summary: We proposed an angle insensitive and broadband I-shaped metasurface-based resonator to enhance absorption in the visible region. By carefully selecting the structure parameters, a wideband absorption of more than 95% from 550 to 651THz is achieved. The absorber is simple in design and insensitive to oblique incidences, making it suitable for applications in solar cells and photonics sensors.
OPTICAL AND QUANTUM ELECTRONICS
(2022)
Review
Chemistry, Multidisciplinary
Lucien Roach, Adrian Hereu, Philippe Lalanne, Etienne Duguet, Mona Treguer-Delapierre, Kevin Vynck, Glenna L. Drisko
Summary: Monolayers of assembled nano-objects with controlled disorder are important for various optical applications. Bottom-up approaches are suitable for large-scale, low-cost fabrication of controlled disorder. This review discusses the quantification of monolayer disorder and the assembly methods used to create them, as well as the parameters affecting particle placement and the use of substrate patterning.
Article
Chemistry, Physical
E. Barrena, R. Palacios-Rivera, A. Babuji, L. Schio, M. Tormen, L. Floreano, C. Ocal
Summary: Research shows that the fluorine content of initial C60F48 deposited on Ag(111) surface at room temperature varies with molecular coverage, with evidence of de-fluorination and transformation into C60 at low molecular coverage. Silver fluoride formation is also observed. The process involves both molecules and the metal surface, with de-fluorination stopping before complete coverage of the substrate surface by fullerenes.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Computer Science, Interdisciplinary Applications
Melanie M. Bay, Silvia Vignolini, Kevin Vynck
Summary: PyLlama is a convenient Python toolkit for computing the electromagnetic reflection and transmission properties of arbitrary multilayered linear media, including anisotropic cases. It implements both the transfer matrix method and the scattering matrix method, providing numerical stability and versatility for modeling different complexities of media.
COMPUTER PHYSICS COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Kevin Vynck, Romain Pacanowski, Adrian Agreda, Arthur Dufay, Xavier Granier, Philippe Lalanne
Summary: “Nanostructured materials have emerged as a promising approach for material appearance design, focusing on creating structural colors by wave interference. However, other important aspects of an object's visual appearance have been neglected. In this study, a multiscale modeling platform was developed to predict the visual effects of macroscopic objects covered by disordered optical metasurfaces. By utilizing nanoscale resonances and mesoscale interferences, unique visual effects were created at the macroscale. This framework opens up new possibilities in fine and applied visual arts.”
Article
Physics, Applied
A. Boschetti, L. Pattelli, R. Torre, D. S. Wiersma
Summary: Spectroscopic applications strive to combine high spectral resolution with large bandwidth, and the recent development of super-resolved spectroscopy techniques offers new opportunities for this. These unconventional methods, utilizing concepts such as sparse sampling, artificial intelligence, and post-processing reconstruction algorithms, have promising future directions for development and widespread adoption.
APPLIED PHYSICS LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Antonio Ferraro, Giuseppe Emanuele Lio, Mauro Daniel Luigi Bruno, Sara Nocentini, Maria Penolepe De Santo, Diederik Sybolt Wiersma, Francesco Riboli, Roberto Caputo, Riccardo Cristoforo Barberi
Summary: This work utilizes a hidden photonic multilayer structure to protect a printed QR code on paper, enabling recognition under specific illumination conditions and providing resistance to cloning and tampering attacks. It can be easily integrated into an industrial supply chain to protect consumer goods.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Chemistry, Multidisciplinary
Irina Zubritskaya, Rafael Cichelero, Ihar Faniayeu, Daniele Martella, Sara Nocentini, Per Rudquist, Diederik Sybolt Wiersma, Mark L. L. Brongersma
Summary: This study proposes a tunable metal-insulator-metal Fabry-Perot cavities that can dynamically control light for novel sensing, imaging and display applications. By utilizing reversible mechanical adaptations of a polymer network, dynamic tuning of optical resonances is demonstrated. Solid-state temperature-responsive optical coatings are developed to provide large, reversible and highly linear spectral tuning of FP resonances, allowing for reversible switching between reflective and absorbing states of the device with a modulation efficiency up to 79%.
ADVANCED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Ruggero Rossi, Antonella Salvini, Benedetto Pizzo, Marco Frediani, Diederik Sybolt Wiersma, Camilla Parmeggiani, Daniele Martella
Summary: Adhesives are important in daily life, industry, and healthcare, and continuous improvements are needed in terms of application fields, strength, biocompatibility, recyclability, and reversibility. Embedding photoresponsive molecules into adhesives enables reversible attachment or detachment of surfaces using light, which is ideal for delicate environments. Polymer containing arylazoisoxazoles (AIZs) - azobenzene analogs containing a heterocycle - have been synthesized and applied as adhesives, with mechanical tests showing an increase in adhesion strength from 0.39 to 2.79 MPa. UV irradiation induces formation of the cis isomer, resulting in a drop of more than 70% in adhesion strength. These compounds are potential candidates as adhesives due to their increased load-bearing capacity and ability to form stable or detachable joints under light irradiation.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Marta Vassallo, Daniele Martella, Gabriele Barrera, Federica Celegato, Marco Coisson, Riccardo Ferrero, Elena S. Olivetti, Adriano Troia, Huseyin Sozeri, Camilla Parmeggiani, Diederik S. Wiersma, Paola Tiberto, Alessandra Manzin
Summary: Magnetic hyperthermia is a therapeutic technique that utilizes magnetic nanoparticles to induce controlled temperature increase in diseased tissues. Surface treatments, such as using sodium citrate coating, can enhance the heat release capability of the nanoparticles and improve dispersion and stability in solution. Fe3O4 nanoparticles synthesized in this study exhibit an SLP value of around 170 W/g under a 100 kHz and 48 kA/m magnetic field.
Article
Nanoscience & Nanotechnology
Marta Rojas-Rodriguez, Tania Fiaschi, Michele Mannelli, Leonardo Mortati, Federica Celegato, Diederik S. Wiersma, Camilla Parmeggiani, Daniele Martella
Summary: Liquid Crystalline Networks (LCNs) with different surface topographies obtained by self-assembly can efficiently control cell alignment and differentiation, providing biological models that cannot be reproduced spontaneously on standard culture dishes. These materials can guide the organization of different cell lines, including single cell alignment or high-density cell cultures. The rough surfaces formed by the spontaneous assembly of liquid crystals can control biological models without the need for lithographic patterning or complex fabrication procedures, opening up possibilities for in vitro formation of well-aligned muscle tissue.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Adrian Agreda, Tong Wu, Adrian Hereu, Mona Treguer-Delapierre, Glenna L. Drisko, Kevin Vynck, Philippe Lalanne
Summary: This study presents a modal-based tool that explains the appearance of disordered monolayers of resonant meta atoms. It shows that the combination of plasmonic and Fabry-Perot resonances creates unique iridescent visual effects different from those observed in natural nanostructures or thin-film interferences.
Article
Chemistry, Multidisciplinary
Isabella De Bellis, Daniele Martella, Camilla Parmeggiani, Diederik Sybolt Wiersma, Sara Nocentini
Summary: This article explores tunable photonic crystals made from elastic polymers that respond to their environment, particularly with physical deformations under temperature changes. The physical structure of these crystals can be adjusted by external temperature variations, resulting in a reversible spectral tuning. By comparing the experimental results with calculations and temperature-induced shape changes, it is confirmed that the observed tuning is due to elastic deformations. The achievement of nanometric patterning of tunable anisotropic photonic materials will contribute to the development of reconfigurable photonic crystals and 4D nanostructures.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Iulia Cojocariu, Andreas Windischbacher, Daniel Baranowski, Matteo Jugovac, Rodrigo Cezar de Campos Ferreira, Jiri Dolezal, Martin Svec, Jorge Manuel Zamalloa-Serrano, Massimo Tormen, Luca Schio, Luca Floreano, Jan Dreiser, Peter Puschnig, Vitaliy Feyer, Claus M. Schneider
Summary: Molecule-based functional devices can utilize surface-mediated spin state bistability. Unlike conventional spin crossover complexes, different spin states can only be accessed at temperatures below room temperature, and the high-spin state has a relatively short lifetime. However, the prototypical nickel phthalocyanine exhibits different behavior, as direct interaction with a copper metal electrode mediates the coexistence of high and low spin states within a 2D molecular array. The spin state bistability is non-volatile and originates from the surface-induced axial displacement of the functional nickel cores.
Article
Materials Science, Multidisciplinary
Giuseppe Emanuele Lio, Sara Nocentini, Lorenzo Pattelli, Eleonora Cara, Diederik Sybolt Wiersma, Ulrich Ruehrmair, Francesco Riboli
Summary: This article studies the physical unclonability of optical physical unclonable functions (PUFs), focusing on diffraction-based optical responses. Through simulations and experiments, the sensitivity of the PUFs to perturbations in position, size, scatterer number, and spatial alignment is investigated. The results show that even small positional perturbations below 30 nm can invalidate the PUF response, highlighting the difficulty in cloning optical PUFs.
ADVANCED PHOTONICS RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Adrian Agreda, Tong Wu, Adrian Hereu, Mona Treguer-Delapierre, Glenna L. Drisko, Kevin Vynck, Philippe Lalanne
Summary: The paper presents a modal-based tool that can accurately analyze the physical mechanisms and features of colloidal disordered monolayers, and investigates the unique iridescent visual appearances created by the combination of plasmonic and Fabry-Perot resonances.
