Article
Chemistry, Multidisciplinary
Alexander Zharov, Zacharias Viskadourakis, George Kenanakis, Vanessa Fierro, Alain Celzard
Summary: This study experimentally demonstrated the control of light transmission through a slab of plasmonic liquid metacrystal by an external electric field. The induced macroscopic anisotropy caused polarization-dependent suppression of transmission at resonant frequencies, indicating selective plasmon excitation based on the orientation of meta-atoms with respect to the electromagnetic wave polarization. Analyzed theoretically from first principles, the results were compared with experimental data.
Review
Optics
Arash Ahmadivand, Burak Gerislioglu
Summary: The text discusses the development of photonic biosensors and their applications in detecting biomarkers and diseases, as well as the use of metamaterials in photonic biosensors and emerging technologies in the modern pharmaceutical industry.
LASER & PHOTONICS REVIEWS
(2022)
Article
Chemistry, Multidisciplinary
Jussi Kelavuori, Viatcheslav Vanyukov, Timo Stolt, Petri Karvinen, Heikki Rekola, Tommi K. Hakala, Mikko J. Huttunen
Summary: By breaking the symmetry of the nanoparticle surroundings, the properties of high quality factor SLRs can be easily modified. We demonstrated how changing the refractive index of the surrounding immersion oil by controlling the ambient temperature of the device can increase the quality factor of the SLR. These results show accurate and reversible modification of SLR properties, opening up possibilities for tunable SLR-based photonic devices.
Review
Materials Science, Multidisciplinary
Ruisheng Yang, Jing Xu, Nian-Hai Shen, Fuli Zhang, Quanhong Fu, Junjie Li, Hongqiang Li, Yuancheng Fan
Summary: All-optical processing is a promising strategy for future information systems, with the importance of breaking the diffraction limit of light and achieving effective light manipulation. Subwavelength optical localization allows for freely manipulating light fields, and this review summarizes the development of achieving subwavelength optical localization by exciting toroidal mode in photonic metamaterials.
Article
Optics
Yiwen Liu, Lili Gui, Kun Xu
Summary: The research investigates enhanced second-harmonic generation in gold Fano metasurfaces using nonlinear scattering theory. By introducing structural asymmetries, the second-harmonic signal is further amplified. Under optimal conditions, the previously suppressed SHG component is released, resulting in a 6-fold enhancement in total SHG intensity.
Article
Chemistry, Multidisciplinary
Xiaolan Kang, Vilde Mari Reinertsen, Kevin Gregor Both, Augustinas Galeckas, Thomas Aarholt, Oystein Prytz, Truls Norby, Dragos Neagu, Athanasios Chatzitakis
Summary: There is a growing demand to control and enhance the stability and efficacy of nanoparticles (NPs) for photo- and electrochemical energy conversion applications. The galvanic replacement/deposition method offers a simpler and safer approach to produce a wide range of hybrid nanostructures with increased tailorability. These bimetallic nanostructures, supported on SrTiO3, show exceptional activity in plasmon-assisted photoelectrochemical water oxidation reactions.
Article
Chemistry, Multidisciplinary
Ufuk Kilic, Matthew Hilfiker, Alexander Ruder, Rene Feder, Eva Schubert, Mathias Schubert, Christos Argyropoulos
Summary: This article demonstrates how nanohelical metamaterials can achieve spectrally tunable, extremely large, and broadband chiroptical response, addressing the challenges in controlling and enhancing chiral light-matter interactions.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Physics, Applied
Zhancheng Li, Yifan Jiang, Wenwei Liu, Yuebian Zhang, Hua Cheng, Junjie Li, Jianguo Tian, Shuqi Chen
Summary: We demonstrate that hybrid bilayer plasmonic metasurfaces, fabricated through a simple one-step nanofabrication process, are ideal candidates for realizing intrinsic chiral optical responses and spin-selective transmission. The proposed metasurfaces offer advantages such as compact design, easy control of chiral optical response, and lower fabrication demand, thus expanding the application potential of chiral plasmonic nanostructures in spin nanophotonics, nonlinear optics, and optical sensing.
APPLIED PHYSICS LETTERS
(2023)
Article
Engineering, Environmental
Bin Zhu, Lu-Yao Zhang, Jing-Lin Liu, Xiao-Min Zhang, Xiao-Song Li, Ai-Min Zhu
Summary: In this study, an Au-Ag plasmonic nanocatalyst achieved by plasma restructuring and activation was reported to exhibit high activity in the VL photocatalytic oxidation of CO. The contribution of O-2 plasma treatment and the enhancement mechanism for the Au-Ag plasmonic nanocatalyst were also disclosed.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
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)
Review
Biochemistry & Molecular Biology
Joshua Piaskowski, Gilles R. Bourret
Summary: This article reviews the use of electrochemistry in synthesizing metal nanostructures for plasmonics. It discusses both template-free and templated electrochemical synthesis methods and their strengths and limitations. Special emphasis is given to templated electrochemical lithographies, which enable the synthesis of complex metal architectures with defined dimensions and compositions.
Article
Optics
Jiaqing Liu, Xiao Li, Jiaqi Tao, Daxing Dong, Youwen Liu, Yangyang Fu
Summary: In this study, a significant enhancement of the photonic spin Hall effect (SHE) was achieved in a plasmonic metasurface with S-4 symmetry. A new method for designing spin-based nanophotonic devices was discovered.
Article
Engineering, Electrical & Electronic
Z. Jalilian, R. Moradian
Summary: This study investigates the effect of copper and titanium dioxide nanoparticles as a substrate on the optical response of double negative-index plasmonic metamaterials layers. The thin-film characterizations were analyzed using various techniques, and the optical properties of the films were described using the film matrix method, confirming the optical gain property of the fabricated layers.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Optics
Suetying Ching, Chakming Chan, Jack Ng, Kokwai Cheah
Summary: Metals are commonly used in plasmonic devices due to their strong plasmonic properties, but tuning these properties is challenging. This study found that the silver alloy silver-ytterbium possesses tunable plasmonic properties, with the ability to adjust the plasmonic response strength by varying ytterbium concentration, potentially leading to a new type of tunable plasmonic material.
Article
Chemistry, Multidisciplinary
Anatoliy V. V. Goncharenko, Vyacheslav M. M. Silkin
Summary: Efficient simulation methods for nonlocal effects in nanostructures have been developed. This study introduces a simple and accurate simulation modeling technique based on the transfer-matrix method to compute higher-order nonlocal corrections in 1D plasmonic periodic nanostructures. The results provide a framework for guiding experiments and designing metamaterials.
Article
Materials Science, Multidisciplinary
Yong Li, Bao-Nam Ngo-Dinh, Juergen Markmann, Joerg Weissmueller
Summary: The study explores the evolution of silver-rich clusters in nanoporous gold formation through dealloying, illustrating their impact on the material's functional behavior. The size of these clusters decreases with increasing dealloying potential, showing a similar trend to that of ligaments. Experimental simulations confirm that the size of the silver-rich clusters can be measured and provides an experimental signature of the initial size in the process.
Article
Chemistry, Multidisciplinary
Tobias Abele, Tobias Messer, Kevin Jahnke, Marc Hippler, Martin Bastmeyer, Martin Wegener, Kerstin Goepfrich
Summary: Through two-photon 3D laser printing, high precision hydrogel structures have been successfully manufactured inside preformed lipid vesicles, allowing for the deterministic positioning of cellular components. This technology can also create early functional architectures, such as transmembrane pores, for transporting biological cargo.
ADVANCED MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Alexander Muenchinger, Vincent Hahn, Dominik Beutel, Simon Woska, Joel Monti, Carsten Rockstuhl, Eva Blasco, Martin Wegener
Summary: This approach allows for the alignment of liquid crystal networks or elastomers in three dimensions during multi-photon laser printing, enabling the creation of 3D micro-heterostructures that exhibit large-amplitude elastic actuation under ambient conditions. It involves the use of a specialized sample cell with variable height and optical components to ensure a single well-defined laser focus for different electric field orientations.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Materials Science, Multidisciplinary
Joerg Weissmueller, Shan Shi
Summary: Elastic compliance of porous metals can be greatly enhanced by alloying mobile solutes into interstitial sites of the crystal lattice, as recent experiments have shown. These observations support the predictions by Gorsky and Larche and Cahn for the elasticity of open systems probed at constant chemical potential. The mechanism behind this enhancement involves an exchange of solutes between tensile and compressive fibers in the microstructure's beam-like elements.
Article
Chemistry, Physical
Alex Ricardo Silva Olaya, Franziska Kuehling, Christoph Mahr, Birthe Zandersons, Andreas Rosenauer, Joerg Weissmueller, Gunther Wittstock
Summary: Nanoporous gold (NPG) with less than 1% residual Ag content was studied as an electrocatalyst for the oxidation of methanol, formaldehyde, and formate. The surface structure and oxidation reaction of NPG can be controlled by adjusting the Ag content and potential. Ag has a significant impact on the onset potential and peak current density of the catalytic reaction.
Article
Chemistry, Multidisciplinary
Gideon Henkelmann, Diana Waldow, Maowen Liu, Lukas Luehrs, Yong Li, Joerg Weissmueller
Summary: Experimental results show that thin films of dealloyed nanoporous gold (NPG) spontaneously detach from massive gold base layers and densify near the external surface. This behavior is reproduced by kinetic Monte Carlo (KMC) simulation and is common for nanoscale network materials evolving by surface diffusion.
Article
Optics
Vincent Hahn, Pascal Rietz, Frank Hermann, Patrick Mueller, Christopher Barner-Kowollik, Tobias Schloeder, Wolfgang Wenzel, Eva Blasco, Martin Wegener
Summary: In recent years, there has been a growing interest in high-speed, high-resolution optics-based 3D printing technology. By combining image projection with optical nonlinearity, researchers have successfully achieved high printing rates with small voxel volumes.
Article
Materials Science, Multidisciplinary
Maowen Liu, Joerg Weissmueller
Summary: This study investigates the microstructure and phase decomposition in nanoporous Au-Pt materials fabricated by dealloying. The findings reveal that the enrichment of Pt at the surface and Pt depletion in the bulk during dealloying result in a homogeneous single-phase state in the material. Annealing induces diffusion-driven coarsening and the formation of Pt-rich regions with crystallographic coherence and semi-coherent regions. The study demonstrates the high kinetic stability and tunability of surface composition in nanoporous alloys through annealing.
Article
Physics, Multidisciplinary
Vibhuti Rai, Lukas Gerhard, Nico Balzer, Michal Valasek, Christof Holzer, Liang Yang, Martin Wegener, Carsten Rockstuhl, Marcel Mayor, Wulf Wulfhekel
Summary: This article presents a new method to activate single molecules by decoupling them from a metallic substrate using the tip of a scanning tunneling microscope, thus achieving individual molecule luminescence. The emission performance of this method compares favorably in terms of quantum efficiency, stability, and reproducibility to that of single molecules deposited on thin insulating layers.
PHYSICAL REVIEW LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Natalie Munding, Magdalena Fladung, Yi Chen, Marc Hippler, Anthony D. Ho, Martin Wegener, Martin Bastmeyer, Motomu Tanaka
Summary: Cell behaviors depend on the elastic properties of the microenvironments, which differ from polymer-based substrates. Metamaterials, with adjustable elastic properties, offer a promising way to mechanically control stem cells. By designing microstructured bio-metamaterials based on a silicon elastomer-like photoresist and two-photon laser printing, the differential responses of human mesenchymal stem cells (hMSCs) correlate with the calculated elastic properties of the bio-metamaterials, suggesting the potential of using bio-metamaterials for cell behavior regulation.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Michael Fidelis Gross, Jonathan Ludwig Guenter Schneider, Yu Wei, Yi Chen, Sebastian Kalt, Muamer Kadic, Xiaoning Liu, Genkai Hu, Martin Wegener
Summary: In classical Cauchy elasticity, 3D materials have six eigenmodes of deformation. Extremal elastic materials are classified based on the number of easy eigenmodes out of these six, leading to hexamode (N=6), pentamode (N=5), tetramode (N=4), trimode (N=3), dimode (N=2), and monomode (N=1) materials. Pentamode metamaterials have attracted significant attention, and in this study, microstructured 3D polymer-based tetramode metamaterials were designed, characterized, and compared to theoretical expectations. The potential application as a compact and broadband polarizer for acoustical phonons at ultrasound frequencies was demonstrated.
ADVANCED MATERIALS
(2023)
Article
Physics, Multidisciplinary
Richard Craster, Sebastien Guenneau, Muamer Kadic, Martin Wegener
Summary: Mechanical metamaterials, designed composites with elastic behaviors and effective mechanical properties beyond those of their individual ingredients, have made significant progress in the last decade due to advances in computational science and manufacturing. This review provides a tutorial on its mathematical basis and summarizes the state-of-the-art in both conceptual and experimental aspects.
REPORTS ON PROGRESS IN PHYSICS
(2023)
Article
Physics, Multidisciplinary
Yi Chen, Ke Wang, Muamer Kadic, Sebastien Guenneau, Changguo Wang, Martin Wegener
Summary: Previous theory and experiment have shown that introducing strong nonlocal interactions in addition to local interactions into metamaterials can lead to unusual wave dispersion relations. In this study, the authors investigate the frequency-dependent acoustical phonon transmission in a slab of nonlocal metamaterial. They find a series of bound states in the continuum and sharp transmission resonances next to sharp transmission minima. The findings are validated by numerical calculations on three-dimensional metamaterial microstructures.
COMMUNICATIONS PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Sambit Bapari, Lukas Luehrs, Joerg Weissmueller
Summary: Researchers use nanoporous gold (NPG) and a leveled-wave model to characterize the characteristic length scale of random bicontinuous microstructures. By comparing experiment and model, they find that the size distribution is uniform over the cross-section of NPG samples and evolves self-similarly upon coarsening. The electrochemical capacitance ratio method accurately measures the size and correlates well with the model. The findings provide conversion factors between different size metrics and demonstrate the combination of NPG and the leveled-wave model as a showcase for characterizing random microstructures.
Article
Materials Science, Multidisciplinary
Ke Wang, Yi Chen, Muamer Kadic, Changguo Wang, Martin Wegener
Summary: By introducing a two-dimensional metamaterial platform, we utilize nonlocal effects as a powerful design tool to control the wave properties of metamaterials. The study shows that the lowest band can be engineered by Fourier synthesis, and waves can be transferred from a local metamaterial to a nonlocal metamaterial through a carefully designed transition region.
COMMUNICATIONS MATERIALS
(2022)
