Article
Chemistry, Multidisciplinary
Zijie Gao, Yanpeng Shi, Meiping Li, Jinmei Song, Xiaoyu Liu, Xiaodong Wang, Fuhua Yang
Summary: Tunable extraordinary optical transmission (EOT) with graphene is achieved in the terahertz frequency regime using a novel metallic ring-rod nested structure, leading to the generation of double-enhanced transmission peaks primarily originating from the excitation of localized surface plasmon resonances (LSPRs). By regulating the Fermi energy (E-f) of the graphene, an adjustment from bimodal EOT to unimodal EOT is obtained, demonstrating promising application prospects in frequency-selective surfaces, communication, filtering, and radar.
Article
Chemistry, Physical
Stefan Michalik, Pal Jovari, Karel Saksl, Martin Durisin, Dusan Balga, Jacques Darpentigny, Michael Drakopoulos
Summary: Detailed information on the atomic arrangement of glassy Cu54Hf46, Cu61Hf39 and Cu69Hf31 alloys has been obtained through reverse Monte Carlo simulation using high-energy X-ray diffraction and neutron diffraction data. Cu-centered clusters exhibit stronger ordering compared to Hf-centered clusters, and Cu54Hf46 and Cu61Hf39 have better glass forming ability than Cu69Hf31.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
X. Zhang, H. Luan, H. Lou, T. Liang, S. Chen, D. Xu, Z. Yin, L. Wang, J. Zeng, Y. Ren, Z. Zeng, Y. Shao, K. -f. Yao, Q. Zeng
Summary: This study investigated the structural evolution of a Zr20Nb20Cu20Ni20Ti20 quinary high-entropy metallic glass (HE-MG) as a function of temperature and found that the high-entropy effect plays a crucial role in HE-MGs. The high-entropy effect leads to high variability in the chemical short-range order (CSRO), offering a potential avenue for effectively tuning structures and tailoring properties for various applications.
MATERIALS TODAY PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
S. F. Wei, X. D. Wang, K. K. Qiu, T. D. Xu, Q. P. Cao, S. Q. Ding, D. X. Zhang, J. Z. Jiang
Summary: In this study, the origins of pronounced and unpronounced beta-relaxation behaviors in Y60Ni16Al24 and Y60Fe16Al24 metallic glasses were elucidated using experimental and theoretical approaches. The results indicate that the atomic dynamics of mobile atoms are not only related to their local geometry, but also to their chemical compositions.
Article
Materials Science, Ceramics
Saeedeh Naghdali, Saeed G. Shabestari, Hassan Saghafian, Parthiban Ramasamy, Florian Spieckermann, Zhuo Chen, Zaoli Zhang, Juergen Eckert
Summary: Through the use of DSC, SEM, TEM, and XRD, we have discovered hierarchical transformations during the crystallization of Mg66Zn29Ca5 metallic glass ribbons. The activation energies for the crystallization process were calculated using different thermodynamic models. Our findings indicate the formation of short-range order patterns in Mg66Zn29Ca5 metallic glass and the impact of heating rate on crystallization and growth process. The phase transformations during annealing were also studied, revealing the formation and consumption of various metastable phases.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Nanoscience & Nanotechnology
Zhengxiong Su, Tan Shi, Huahai Shen, Li Jiang, Lu Wu, Miao Song, Zhiming Li, Sheng Wang, Chenyang Lu
Summary: This study directly revealed the chemical short-range order (CSRO) in a face-centered cubic equiatomic NiCoFeCrMn high-entropy alloy using advanced transmission electron microscopy. The researchers also demonstrated a new possibility of tailoring CSRO by radiation.
SCRIPTA MATERIALIA
(2022)
Article
Chemistry, Physical
E. Silberstein, G. Makov
Summary: The structure of liquid methanol has been investigated using experimental and computational methods. The quasi-crystalline model is applied to analyze the short-range order of methanol, and molecular dynamics simulations are used to obtain the radial distribution functions. The results suggest that methanol at different temperatures and pressures can have different structures, with open chains and cyclic tetramers being the dominant structures at certain conditions.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Materials Science, Multidisciplinary
Kamran Karimi, Amin Esfandiarpour, Rene Alvarez-Donado, Mikko J. Alava, Stefanos Papanikolaou
Summary: The shear-banding instability in quasistatically driven bulk metallic glasses emerges from collective dynamics mediated by shear transformation zones and associated nonlocal elastic interactions. The sharp structural features of shear bands are typically correlated to the sharpness of the plastic yielding transition in alloys composed of multiple different elements, and plastic yielding of bulk metallic glasses with similar element radii is highly dependent on compositional and ordering features. Short-range ordering of icosahedra clusters and strain localization are controlled by the interplay between composition-driven icosahedra-ordering and collectively-driven shear transformation zones.
Article
Materials Science, Multidisciplinary
Jinmei Song, Yanpeng Shi, Xiaoyu Liu, Meiping Li, Xiaodong Wang, Fuhua Yang
Summary: Enhanced extraordinary optical transmission (EOT) is achieved in the terahertz (THz) region by a gold hole array with a concentric hemisphere, resulting in significantly enhanced transmission intensity and bandwidth, as well as reduced structure size. The optical characteristics of the hemisphere-in-hole structure are thoroughly analyzed, and altering the shapes and sizes of the central particles affects the enhanced EOT. This research expands the application prospects for many THz plasmonic devices.
OPTICAL MATERIALS EXPRESS
(2021)
Article
Materials Science, Multidisciplinary
Mitra L. Taheri, Elaf Anber, Annie Barnett, Simon Billinge, Nick Birbilis, Brian DeCost, Daniel L. Foley, Emily Holcombe, Jonathan Hollenbach, Howie Joress, Georgia Leigh, Yevgeny Rakita, James M. Rondinelli, Nathan Smith, Michael J. Waters, Chris Wolverton
Summary: This article reviews the opportunities and challenges associated with complex concentrated materials that exhibit short-range order. It discusses the difficulties in accurately representing, characterizing, and designing materials with such complexity. The advancements in high-resolution, high-fidelity methods, and machine-learning-aided techniques have paved the way for the realization of deterministically short-range ordered complex concentrated systems, enabling their development for various applications in functional, structural, and biomedical fields.
Article
Physics, Condensed Matter
Chunyu Han, Weiyu Yang, Yingkun Lan, Minhua Sun
Summary: In this study, the role of minor addition of Al in CuZrAl metallic glasses was investigated using molecular dynamics simulation. The results show that Al atoms tend to act as centers of icosahedron, increasing the fraction of full ICO and facilitating the formation of Bergman medium range order, leading to higher glass forming ability of CuZrAl metallic glasses. The enhancement mechanism of Al addition on Bergman MRO is explained by its adhesive effect on icosahedral clusters.
PHYSICA B-CONDENSED MATTER
(2021)
Article
Physics, Multidisciplinary
Lin Zhang, Jiu Hui Wu
Summary: The study reveals the extraordinary optical transmission phenomenon of a subwavelength thin microcavity based on macroscopic quantum effects, elaborating on the uncertainty property of the transmitted electromagnetic fields and identifying a critical radius and different transmission field characteristics under varying aperture radii. The research also investigates the influence of incident wavelength and microcavity thickness on EOT.
Article
Materials Science, Multidisciplinary
Przemyslaw Dziegielewski, Georgos Evangelakis, Jerzy Antonowicz
Summary: Metallic glasses are amorphous solids with liquid-like atomic structure. In this study, molecular dynamics simulations were used to investigate the variations in short-to-medium-range order of three binary Zr-Cu metallic glasses under compression. The results showed structural similarities between different alloys under high pressure, and the topological short-to-medium-range order was found to be composition-independent.
COMPUTATIONAL MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Keita Nomoto, Anna Ceguerra, Christoph Gammer, Bosong Li, Huma Bilal, Anton Hohenwarter, Bernd Gludovatz, Jurgen Eckert, Simon P. Ringer, Jamie J. Kruzic
Summary: The study revealed the hierarchical structure of BMGs through nanobeam electron diffraction experiments, showing that the local hardness of microscale domains decreases with the size and volume fraction of atomic clusters with higher local MRO. A model of ductile phase softening was proposed to enable the design of BMGs in the future by tuning the MRO size and distribution in the nanostructure.
Article
Materials Science, Multidisciplinary
Songling Liu, Xinyu Luo, Jingshan Cao, Zhaoyuan Liu, Beibei Xu, Yonghao Sun, Weihua Wang
Summary: This study evaluates the chemical medium-range ordering in liquid alloys using persistent homology, and finds that in metallic glasses, this ordering is regulated by the activation and inhibition of the constituent components, resulting in a Turing pattern in the topology. The chemical medium-range ordering strongly depends on the elemental types.
MATERIALS TODAY PHYSICS
(2023)
Article
Optics
Sai Kanth Dacha, Wenqi Zhu, Amit Agrawal, Kenneth J. Ritter, Thomas E. Murphy
Summary: We experimentally demonstrate a unique power-dependent rotation effect in the vectorial mode superposition of two spin-orbit coupled orbital angular momentum (OAM) modes, which co-propagate in the Kerr nonlinear regime in a hollow ring-core optical fiber. The added spatial dimension produces a visually observable rotation of the spatial pattern emerging from the fiber when imaged through a linear polarizer.
Article
Chemistry, Physical
Babak Nikoobakht, Jonathan Lee, Amit Agrawal, Scott Wight, Michael Shur
Summary: Nanostructured semiconductors have the potential to miniaturize electrically driven semiconductor lasers. This study analyzes lateral ZnO fins as an optical gain medium and an optical resonator, revealing their excellent performance in electron-hole pair collection efficiency and resonance mode formation.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Review
Instruments & Instrumentation
Nandita Abhyankar, Amit Agrawal, Jason Campbell, Thorsten Maly, Pragya Shrestha, Veronika Szalai
Summary: This article introduces the application and challenges of microresonators in EPR spectroscopy, and provides insights into resonator sensitivity analysis, design and fabrication of microresonators, as well as the requirements and challenges of incorporating microresonators into EPR spectrometer systems.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2022)
Article
Multidisciplinary Sciences
Lu Chen, Wenqi Zhu, Pengcheng Huo, Junyeob Song, Henri J. Lezec, Ting Xu, Amit Agrawal
Summary: Researchers have proposed a flexible approach to synthesize ultrafast optical transients with arbitrary control over its complete spatiotemporal evolution by leveraging the multifunctional control of light at the nanoscale. This method supports an ultrawide bandwidth with high spectral and spatial resolution, enabling the synthesis of complex states of structured space-time wave packets.
Article
Chemistry, Multidisciplinary
Ruixuan Yu, Pengcheng Huo, Mingze Liu, Wenqi Zhu, Amit Agrawal, Yan-qing Lu, Ting Xu
Summary: The electron vortex beam (EVB) carrying quantized orbital angular momentum (OAM) is important in fundamental research, but its wide applications in electron microscopy have been hindered by the dependence of the transverse intensity profile radius on the topological charge of the OAM. Inspired by perfect vortex in optics, a perfect electron vortex beam (PEVB) is demonstrated, which eliminates the constraint between beam size and OAM. Nanoscale holograms are designed to generate PEVBs with different OAM quanta but similar beam sizes, and the beam size can be easily controlled by modifying hologram design parameters. The generation of PEVB with customizable beam size independent of OAM enables various in situ applications of free electrons OAM in electron microscopy.
Article
Chemistry, Multidisciplinary
Riad Yahiaoui, Zizwe A. Chase, Chan Kyaw, Fuyang Tay, Andrey Baydin, G. Tim Noe, Junyeob Song, Junichiro Kono, Amit Agrawal, Motoaki Bamba, Thomas A. Searles
Summary: By enhancing the cooperation between atoms on a terahertz metasurface, strong coupling and ultrasensitive sensing required in quantum information technology can be achieved.
Article
Optics
L. Chen, P. Huo, J. Song, Z. Wang, T. Xu, W. Zhu, A. Agrawal
Summary: Research has found that the polarization state of light is crucial in revealing intrinsic chiral or anisotropic optical response in various material systems, and is important for applications requiring complex polarization encoding. By leveraging the nanoscale multidimensional control of light offered by metasurfaces, we can engineer the temporal evolution of the instantaneous polarization state of a femtosecond pulse through parallel manipulation of its constituent spectral components across an ultrawide bandwidth. We expect this control over the synthesis of complex vectorially shaped pulses to further elucidate ultrafast chiral light-matter interactions.
Article
Chemistry, Multidisciplinary
Yuming Zhao, Chuan Xiao, Elieser Mejia, Aditya Garg, Junyeob Song, Amit Agrawal, Wei Zhou
Summary: Metallic nanostructures can enhance luminescence processes and be used for various applications. However, the dependence of nanoplasmonic metal luminescence on voltage modulation has not been thoroughly studied. In this research, we investigate dynamic voltage-modulated nanoplasmonic metal luminescence using nanolaminate nanooptoelectrode arrays. Our experiments show that the luminescence exhibits negative voltage modulation slope in physiological solutions. We also develop a model to understand the relationship between voltage polarization, ionic strength, and luminescence modulation. This work has implications for optical voltage biosensing, signal transduction, and electrochemical monitoring.
Article
Chemistry, Multidisciplinary
Jyoti Sardana, Shital Devinder, Wenqi Zhu, Amit Agrawal, Joby Joseph
Summary: This study proposes an ultracompact, highly stable interferometer based on a single-layer dielectric metasurface for common path off-axis digital holography, enabling quantitative phase imaging. The system captures image plane holograms in a single shot and provides quantitative phase information on the test samples for extraction of their physical properties. With advantages of stability and cost-effectiveness, this metasurface-based method establishes a miniaturized QPI system for reliable and economic point-of-care devices, live cell imaging, and more.
Article
Optics
Okan Koksal, Junyeob Song, Zi Wang, Lu Chen, Wenqi Zhu, Amit Agrawal
Summary: This study introduces a method to fabricate anti-reflective metasurfaces using a single nanolithography step after deposition of multiple dielectrics onto a substrate. Compared to conventional equivalents, anti-reflective metasurfaces offer better transmission efficiencies and reduce spurious diffraction and higher-order scattering. The results show improved focusing efficiencies for both low and high numerical apertures.
LASER & PHOTONICS REVIEWS
(2023)
Article
Quantum Science & Technology
T-W Hsu, W. Zhu, T. Thiele, M. O. Brown, S. B. Papp, A. Agrawal, C. A. Regal
Summary: In this study, we demonstrate the use of efficient dielectric metasurface lens for trapping and imaging single neutral atoms. We compare the performance of the metasurface lens with numerical computations and predict its potential for future applications in atom trapping and quantum information experiments.
