Article
Multidisciplinary Sciences
Jung-Hwan Song, Soren Raza, Jorik van de Groep, Ju-Hyung Kang, Qitong Li, Pieter G. Kik, Mark L. Brongersma
Summary: Researchers constructed a nanoelectromechanical system that utilizes unique behavior between sub-nanometer plasmonic nanoparticles to create an electro-optical modulator, with a very large mechanical tunability observed at nanometer gap spacing.
NATURE COMMUNICATIONS
(2021)
Article
Multidisciplinary Sciences
Weihao Yang, Qing Liu, Hanbin Wang, Yiqin Chen, Run Yang, Shuang Xia, Yi Luo, Longjiang Deng, Jun Qin, Huigao Duan, Lei Bi
Summary: This study reports the observation of gyromagnetic properties in a magneto-plasmonic metamaterial in the near-infrared wavelength range. The existence of non-zero off-diagonal permeability tensor elements leads to the transverse magneto-optical Kerr effect, offering new possibilities for the application of metamaterials in photonic devices and sensors.
NATURE COMMUNICATIONS
(2022)
Article
Optics
Wei Wang, Fengping Yan, Zhi Wang, Haisu Li, Guifang Wu, Siyu Tan, Xuemei Du, Ting Li, Xiangdong Wang, Hao Guo, Ting Feng
Summary: We present a simple design of a metamaterial absorber (MA) based on a two-dimensional trenched metal meta-grating, which exhibits a single ultra-narrow absorption resonance within a clean background spectrum ranging from 0 to 2 THz. The absorption resonance features a linewidth of 0.4 GHz and a Q factor of 2407, thanks to interference effect and the introduction of an air trench. The MA sensor shows excellent sensing performance with high saturated thickness, maximum sensitivity, and maximum sensing figure of merit.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Optics
Andreas Wacker
Summary: Based on quantum thermodynamics, this study analyzes the coupling between a two-level system and a single electromagnetic mode. By focusing on the case of detuning, where the mode frequency does not match the transition frequency, effective energies for the levels and photon energy are derived. It is shown that these effective energies should be utilized for energy exchange with fermionic and bosonic reservoirs in order to achieve a thermodynamically consistent description in the steady state.
Article
Astronomy & Astrophysics
Csaba L. Korpa, Matthias F. M. Lutz, Xiao-Yu Guo, Yonggoo Heo
Summary: In this study, we propose a nonperturbative and unitary treatment method for multichannel systems with anomalous thresholds based on realistic potentials. We consider an isospin one-half example system with coupled channels, and illustrate various phenomena related to the opening of an anomalous threshold by varying up, down, and strange quark masses. By using a set of low-energy constants adjusted to lattice QCD results, we present the phase shifts and inelasticity parameters for different choices of the pion mass. Our results show the importance of extrapolating lattice QCD calculations towards the physical pion mass.
Article
Chemistry, Analytical
Victor Coello, Mas-ud A. Abdulkareem, Cesar E. Garcia-Ortiz, Citlalli T. Sosa-Sanchez, Ricardo Tellez-Limon, Marycarmen Pena-Gomar
Summary: In this study, the optical properties of a 2D-gap surface plasmon metasurface composed of gold nanoblocks were investigated. The metasurface demonstrated the capability to generate simultaneous multi-plasmonic resonances and offered tunability within the near-infrared domain. Reflectance spectra were analyzed for various lattice periods, revealing two distinct dips with near-zero reflectance indicating resonant modes. The broader dip at 1150 nm exhibited consistent behavior across all lattice periodicities, attributed to a Fano-type hybridization mechanism.
Article
Biochemistry & Molecular Biology
Semih Korkmaz, Evren Oktem, Ramin Yazdaanpanah, Serap Aksu, Mustafa Turkmen
Summary: We present a metamaterial-based perfect absorber that supports four resonances across a wide spectral range from 1.8 μm to 10 μm. The absorber is composed of metal-dielectric-metal layers with a MgF2 spacer sandwiched between an optically thick gold film and patterned gold nanoantennas. Spectral tuning of the absorber is achieved through numerical and experimental calibration of the geometrical parameters. The fabricated quad-band plasmonic absorber exhibits near-unity light absorption and has potential for ultrasensitive detection of small biomarkers, such as S100A9 antibody for brain metastatic cancer cells.
Article
Chemistry, Multidisciplinary
S. R. K. Chaitanya Indukuri, Christian Frydendahl, Nityanand Sharma, Noa Mazurski, Yossi Paltiel, Uriel Levy
Summary: Chirality is an important property of biological and pharmaceutical molecules, and the detection of chiral molecules is challenging. Circular dichroism (CD) and fluorescence detection circular dichroism (FDCD) sensing can enhance the measurement sensitivity of chirality, and a negative-index metamaterial (NIM) cavity can further improve the sensitivity and achieve background-free chiral sensing.
Article
Chemistry, Physical
Min Xi, Cui Liu, Nian Li, Shudong Zhang, Zhenyang Wang
Summary: In this article, the near- and far-field optical properties of coupled dipoles or coupled dipoles and multipoles or a multipole in a coupled plasmonic system were systematically studied through numerical simulations. The effects of gap separation on plasmonic hybridization and the coupling between different shapes of dipoles were also investigated. The research provides theoretical evidence that the coupling between multipoles and dipoles shows stronger hybridization in both near- and far-field compared to the coupling among dipoles, leading to a broader range of resonance and stronger localized E-fields.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
Gino Wegner, Dan-Nha Huynh, N. Asger Mortensen, Francesco Intravaia, Kurt Busch
Summary: The paper discusses the impact of an extended model proposed by Halevi on the nonlocal response of plasmonic materials and nanostructures. It reevaluates the Mie scattering coefficients for a cylinder and corresponding plasmon-polariton resonances within this framework. The analysis reveals a nonlocal, collisional, and size-dependent damping term that affects the resonances in the extinction spectrum. The implementation of the Halevi model in the time domain is particularly important for efficient and accurate modeling of nanogap structures and other nanoscale features in nanoplasmonics applications.
Article
Optics
Ricky Gibson, Ivan Avrutsky, Shivashankar Vangala, Dennis E. Walker, Joshua R. Hendrickson
Summary: A second-order transfer function analysis was performed on plasmonic modes with different quality factors to study the coupling of modes in metal-insulator-metal structures. The asymmetric Fano-like lineshape at resonant crossings was observed in both simulations and angle dependent spectra. By using the pole analysis method, the coupling coefficient for this system was extracted and can be applied to other plasmonic and photonic coupled resonances.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2021)
Article
Physics, Applied
Jinyong Hu, Chuxuan Tan, Wangdi Bai, Yiming Li, Qi Lin, Lingling Wang
Summary: By introducing a dielectric nanocavity, the surface lattice resonances (SLRs) of metal nanostructure arrays can be effectively controlled, improving their spectral features and resonance intensity. This work provides a promising candidate for the development of high-efficiency plasmonic sensors.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Computer Science, Information Systems
Abdelaziz A. Abdelhamid, Sultan R. Alotaibi
Summary: This paper proposes a new approach for predicting the bandwidth of metamaterial antennas using an ensemble model and machine learning techniques, which significantly reduces the time required for antenna design and achieves high prediction accuracy.
CMC-COMPUTERS MATERIALS & CONTINUA
(2022)
Article
Materials Science, Multidisciplinary
Ying Liu, Zebin Zhu, Jisong Qian, Jing Yuan, Jiaxu Yan, Ze Xiang Shen, Liyong Jiang
Summary: Research on the strong coupling mechanism between two-dimensional transition metal dichalcogenides and plasmonic/optical resonators has led to the proposal of a new plasmonic-optical hybrid resonator, achieving a large Rabi splitting and providing a deeper understanding of coupling mechanisms in hybrid systems for studying multiple photonic quasiparticles in TMD materials.
Article
Optics
Shuya Ning, Jiajia He, Naming Zhang, Fan Duan, Shuo Wang, Zhihui Liu
Summary: In this study, a low threshold and wavelength tunable plasmonic nanolaser based on the plasmonic coupling between Au nanosphere and Au film is proposed. The optical properties of the plasmonic coupled nanolaser with different nanosphere diameters and gap distances are investigated using finite element method. The results show that the coupled nanolaser has a larger optical cross section and lower gain threshold than the nanolaser with independent Au nanospheres, which is important for the on-chip application of nanolaser.
JOURNAL OF LUMINESCENCE
(2022)
Article
Chemistry, Multidisciplinary
David Graefe, Marvin Gernhardt, Jiongyu Ren, Eva Blasco, Martin Wegener, Maria Ann Woodruff, Christopher Barner-Kowollik
Summary: This study presents a photoresist that can be entirely degraded by the enzyme chymotrypsin, suitable for biomedical applications. The material can be used to fabricate multi-material microstructures, demonstrating cell biocompatibility and potential as a tissue engineering scaffold that can be easily removed. It shows great promise for basic cell biology research.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Martin Calkovsky, Erich Mueller, Matthias Meffert, Nadejda Firman, Frederik Mayer, Martin Wegener, Dagmar Gerthsen
Summary: The study found that using machine learning segmentation algorithms combined with prior knowledge of SEM image contrast from Monte Carlo simulations can yield more reliable segmentation results, with significant impact on pore size determination and analysis of other 3D material properties, highlighting the importance of the segmentation process in the 3D reconstruction of FIB-SEM data.
MATERIALS CHARACTERIZATION
(2021)
Article
Multidisciplinary Sciences
Zheqin Dong, Haijun Cui, Haodong Zhang, Fei Wang, Xiang Zhan, Frederik Mayer, Britta Nestler, Martin Wegener, Pavel A. Levkin
Summary: The method introduced by the authors combines the advantages of 3D printing and polymerization-induced phase separation, enabling the formation of 3D polymer structures with controllable inherent porosity.
NATURE COMMUNICATIONS
(2021)
Article
Multidisciplinary Sciences
Tobias Frenzel, Julian Koepfler, Andreas Naber, Martin Wegener
Summary: This study achieves nanometer-scale localization accuracy by combining wide-field optical image cross-correlation analysis with 3D printed marker arrays, reaching atomic-scale precision. The experimental setup is simple, reliable, and cost-effective, with the marker arrays easily integrated into the 3D printing process.
SCIENTIFIC REPORTS
(2021)
Article
Multidisciplinary Sciences
Yi Chen, Muamer Kadic, Martin Wegener
Summary: Recent work explored isotropic chiral phonon dispersion relations in cubic crystalline approximants, finding that they have smaller effects compared to highly anisotropic chiral cubic metamaterial crystals. A proposed chiral triclinic metamaterial crystal exhibits larger effects but is more susceptible to fabrication tolerances due to an 'accidental' degeneracy in momentum space.
PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2021)
Article
Materials Science, Multidisciplinary
Yi Chen, Tobias Frenzel, Quan Zhang, Muamer Kadic, Martin Wegener
Summary: A chiral simple-cubic metamaterial crystal exhibiting chiral phonons for all phonon propagation directions in 3D space with nearly isotropic acoustical activity has been successfully designed, offering a blueprint with simple cubic crystal symmetry that is easier to fabricate using 3D additive manufacturing methods. This breakthrough in metamaterial design has been demonstrated through electron micrographs of microstructured samples produced using 3D laser nanoprinting.
PHYSICAL REVIEW MATERIALS
(2021)
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
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
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
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)