Article
Materials Science, Multidisciplinary
Binghui Li, Yu-Sheng Lin
Summary: We introduce four types of tunable terahertz metamaterials made of split-ring resonators (SRRs) with different splits and inner movable structures. These designs can achieve different tuning ranges in transverse electric (TE) and transverse magnetic (TM) modes, exhibiting polarization-dependent and polarization-independent characteristics. By increasing the height of the inner movable structure, the resonant frequency of the metamaterials can be tuned. These designs possess anti-vibration and tunable characteristics, which make them potential candidates for high tunability, flexibility, and applicability in THz-wave optoelectronic devices.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Nanoscience & Nanotechnology
Tong Sun, Zhongyang Bai, Zhaoying Li, Yongshan Liu, Yaxuan Chen, Fan Xiong, Linliang Chen, Yong Xu, Fan Zhang, Dong Li, Junze Li, Weisheng Zhao, Tianxiao Nie, Lianggong Wen
Summary: Broadband spintronic terahertz radiation is efficiently generated by spin-to-charge current conversion in a ferromagnetic/nonmagnetic heterostructure. This study proposes a set of femtosecond laser-driven versatile spintronic terahertz devices by integrating meta-antenna structures with W/CoFeB/Pt nanolayer stacks. These monolithic integrated devices exhibit spintronic terahertz wave emission, spectral modulation, and polarization manipulation simultaneously.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Physics, Applied
Angana Bhattacharya, Bhagwat Singh Chouhan, Rajan Singh, Bhairov K. Bhowmik, Gagan Kumar
Summary: In this study, a unique toroidal metasurface is demonstrated numerically and experimentally, which modulates a broad resonance into a sharp mode by coupling the inherent toroidal dipole excitation to the lattice mode of the metasurface. The polarization independence enables the excitation of a 'lattice-coupled toroidal mode' for both orthogonal polarizations of the incident terahertz radiation. The lattice-matched toroidal excitation-based device has the potential to impact the development of polarization-independent THz components.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Guan Wang, Tong Wu, Jijuan Jiang, Yang Jia, Yang Gao, Yachen Gao
Summary: A switchable multifunctional terahertz absorber based on graphene and vanadium dioxide (VO2) is proposed in this study, and its absorption properties and tuning are investigated. The absorber exhibits broadband absorption in the dielectric phase and narrowband absorption in the metallic phase.
DIAMOND AND RELATED MATERIALS
(2022)
Article
Physics, Multidisciplinary
Koijam Monika Devi, Arun Jana, Ajinkya Punjal, Nityananda Acharyya, Shriganesh S. Prabhu, Dibakar Roy Chowdhury
Summary: In this study, a dynamically tunable polarization independent slow light system is demonstrated via electromagnetically induced transparency (EIT) in a terahertz (THz) metasurface. The results show that the group delay and delay bandwidth product values of the slow THz light can be modulated by adjusting the pump fluence, resulting in a significant change in group velocity. This tunable slow light system has potential applications in delay lines and other ultrafast devices for the THz domain.
NEW JOURNAL OF PHYSICS
(2022)
Article
Optics
Xiaodong Wu, Hailin Cao, Junhui Peng, Zhenya Meng
Summary: Dynamic and independent amplitude and phase manipulation is crucial for advanced wavefronts engineering applications. This paper introduces bi-layer stacked graphene Pancharatnam-Berry (P-B) phase metasurface and mono-layer graphene P-B phase metasurface to tackle the coupling issue between amplitude and phase, achieving independent control and reducing their coupling strength. The simulation results demonstrate the feasibility of the proposed models, which offer a flexible and straightforward approach for precise wave reconstruction applications such as holography, optical tweezers, and high-resolution imaging.
Article
Optics
Xiaodong Wu, Hailin Cao, Junhui Peng, Zhenya Meng
Summary: This paper proposes and numerically demonstrates the bi-layer stacked graphene Pancharatnam-Berry (P-B) phase metasurface and mono-layer graphene P-B phase metasurface to address the coupling issue between amplitude and phase in wavefront modulation. The simulation results show that the proposed models can achieve independent control of amplitude and phase and significantly reduce their coupling strength. Our findings offer a flexible and straightforward method for precise wave reconstruction applications such as holography, optical tweezers, and high-resolution imaging.
Article
Materials Science, Multidisciplinary
Yao Wen, Tao Xu, Yu-Sheng Lin
Summary: This design presents a MEMS-based tunable terahertz metamaterial device with polarization-dependent sensing characteristics. The device can achieve tunable dual-band resonances in TE and TM modes by changing the gap between resonators, and it exhibits sensitivity to changes in environmental refractive index. The results indicate high linear sensitivity and excellent performance for gas and environmental applications.
RESULTS IN PHYSICS
(2021)
Article
Engineering, Electrical & Electronic
Sambit Kumar Ghosh, Santanu Das, Somak Bhattacharyya
Summary: This paper presents a detailed study on a graphene-based metasurface that can function as a tunable broadband linear to circular polarization converter in the terahertz gap. The device provides a wide polarization conversion band with an enhanced fractional 3-dB axial ratio bandwidth. It has potential applications in THz beam scanning antennas, RCS reduction, and THz antennas for space and military radar.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Zhenjie Feng, Bo Ni, Yitong Qian, Haibin Ni, Xiaoyan Zhou, Lingsheng Yang, Fei Liu, Jianhua Chang
Summary: A dual-channel narrowband polarization independent terahertz absorber based on graphene-silica raised ring has been proposed and investigated. The absorber achieves two narrowband near-unit absorption peaks at 2.44 THz and 5.56 THz. By cascading structures and changing the shape of the dielectric layer, more and narrower absorptions can be formed. The physical mechanism of these structures at the resonant position is verified and explained using impedance matching and electromagnetic field distribution. Simulation results show that the absorber is insensitive to the polarization angle in TE and TM modes due to rotational symmetry. As a sensor device, it exhibits a maximum Q value of 101.5 and maximum sensitivity of 1.04 THz/ RIU. Additional tuning of a third near-unit narrowband absorption at 8.37 THz can be achieved by cascading a SiO2 disk. The absorber designed in this paper shows great promise for applications in frequency selectors, sensors, filters, and more.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Optics
Ming Zhang, Qian Cheng, Baozhu Wang, Lin Yang, Jianchao Wang, Ruihong Wu, Weimin Hou
Summary: In this paper, a polarization-independent and multi-resonances metasurface was designed for high-performance THz sensing. The metasurface exhibited three polarization-independent and strong resonance peaks, all showing high sensitivity to the ambient refractive index. The results of this study lay the theoretical and technical foundation for the design of high-sensitivity terahertz sensing.
OPTICS COMMUNICATIONS
(2022)
Article
Physics, Multidisciplinary
Zhen Yue, Jitao Li, Jie Li, Chenglong Zheng, Binbin Lu, Jingyu Liu, Fan Yang, Hui Li, Yan Zhang, Yating Zhang, Xiaofei Zang, Jianquan Yao
Summary: This work proposes a transmission-mode, multichannel all-silicon metasurface platform that can independently implement functionalities in two orthogonally polarized output fields under linearly polarized incidences, promoting design flexibility. By designing, fabricating, and characterizing a monolayer metasurface composed of silicon pillars, the ability of multi-dimensional light field control, such as polarization-switchable focusing beam, is demonstrated. Additionally, the designed metasurface can generate polarization-switchable Bessel vortex beams under linearly polarized incidences, verifying the flexibility and practicality of the platform.
ANNALEN DER PHYSIK
(2023)
Article
Materials Science, Multidisciplinary
Guozheng Wu, Chao Li, Dong Wang, Wenya Chen, Song Gao, Haijun Guo, Chunwei Zhang, Shijing Guo
Summary: In this paper, a terahertz absorber with switchable absorption modes is introduced using patterned graphene-vanadium dioxide. By thermally tuning vanadium dioxide and electrically controlling graphene, the device can switch between two distinct absorption modes. The device achieves an ultra-broadband absorption with a bandwidth of 4.62 THz when the conductivity of vanadium dioxide is 200,000 S/m and a narrower bandwidth of 0.95 THz when the conductivity is 200 S/m. Controlling the Fermi energy of graphene allows for control over the amplitude and frequency shift of the broadband mode. The device also exhibits remarkable symmetry and robust absorption characteristics. Potential applications include broadband mirrors and electromagnetic shielding.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Zhongqiu Zhan, Jiang Wei, Yan Miao, Qingkang Wang
Summary: All-dielectric metasurfaces are designed as periodic 2D gratings on slab waveguides to achieve polarization-insensitive guided-mode resonance filters in the terahertz region. The effect of grating periods along the x- and y-axis on the filter's performance is systematically studied. Adjusting the grating periods along the x-axis determines the polarization-independent resonance frequency of the split bands, while additional polarization-independent resonances are formed by the intersection of split and degenerate bands for two unequal grating periods. These findings provide potential applications for narrowband filtering in terahertz communication or sensing systems.
IEEE PHOTONICS JOURNAL
(2023)
Article
Optics
Donghai Han, Xiangdong Fang, Liuyang Zhang, Xuefeng Chen
Summary: This study presents a kirigami-based terahertz metamaterial that allows for the modulation of circular polarization differential transmittance (CPDT) by breaking in-plane symmetry. The deformation of the metamaterial through tensile strain enables chiral switching. Additionally, the effects of kirigami cuts, height difference, and rotation angle of silicon pillars on the CPDT spectra are analyzed.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Xiaorong Zhou, Xiaowei Zhang, Jiabao Yi, Peixin Qin, Zexin Feng, Peiheng Jiang, Zhicheng Zhong, Han Yan, Xiaoning Wang, Hongyu Chen, Haojiang Wu, Xin Zhang, Ziang Meng, Xiaojiang Yu, Mark B. H. Breese, Jiefeng Cao, Jingmin Wang, Chengbao Jiang, Zhiqi Liu
Summary: This paper reports the successful synthesis of a series of superconducting Nd0.8Sr0.2NiO2 thin films and the observation of a large exchange bias effect between the superconducting films and a thin ferromagnetic layer, indicating the existence of antiferromagnetic order. These experimental results are fundamentally critical for the current field.
ADVANCED MATERIALS
(2022)
Article
Multidisciplinary Sciences
S. M. P. Kalaiselvi, E. X. Tang, H. O. Moser, M. B. H. Breese, S. P. Turaga, H. Kasi, S. P. Heussler
Summary: We present a novel method for micromanufacturing high precision optical components using x-ray lithography. The method involves the use of multiple moveable stencil masks to achieve deep x-ray lithography, resulting in high quality micro/nano components. With its parallel processing capability, this method shows promise for mass manufacturing and expanding the application areas of analytical devices.
SCIENTIFIC REPORTS
(2022)
Article
Medicine, Legal
P. Chytry, G. M. S. Souza, R. Debastiani, C. E. I. dos Santos, J. M. R. Antoine, A. Banas, K. Banas, L. Calcagnile, M. Chiari, I. Hajdas, M. Molnar, P. Pelicon, N. Pessoa Barradas, G. Quarta, F. S. Romolo, A. Simon, J. F. Dias
Summary: This article discusses the synergistic use of different accelerator-based techniques as a powerful analytical tool for forensic studies of foodstuff. Brazilian and Jamaican coffees were chosen as samples for comprehensive characterization, including major and trace elements, provenance determination, and compound contents, using techniques such as PIXE, FTIR, and AMS-C-14. Five laboratories from research institutions around the world participated in the experiments. The integration of results from different techniques provided multifaceted perspectives on the coffee under study, enabling direct assessment for forensic purposes such as authentication, determining provenance, and combating counterfeiting.
FORENSIC SCIENCE INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Xiao Chi, Lily Mandal, Cuibo Liu, Angga Dito Fauzi, Anindita Chaudhuri, Thomas J. Whitcher, Hariom Kirit Jani, Zhongxin Chen, Shibo Xi, Caozheng Diao, Muhammad Avicenna Naradipa, Xiaojiang Yu, Ping Yang, Antonio Helio Castro-Neto, Mark B. H. Breese, Kian Ping Loh, Thirumalai Venky Venkatesan, Andrivo Rusydi
Summary: This study reveals a new many-body large-hole polaron in BiVO4 films and its importance in determining the photocatalytic activity through the interplay with the indirect bandgap.
NPG ASIA MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
C. Sathish, Gopalakrishnan Kothandam, Premkumar Selvarajan, Zhihao Lei, Jangmee Lee, Jiangtao Qu, Ala'a H. Al-Muhtaseb, Xiaojiang Yu, Mark B. H. Breese, Rongkun Zheng, Jiabao Yi, Ajayan Vinu
Summary: In this study, well-defined mesoporous boron carbon nitride (MBCN) with high specific surface area, tunable pores, and nitrogen contents was successfully prepared through chemical polymerization and nano-hard-templating approach. The optimized sample exhibited high specific capacitance, large specific capacity for sodium-ion battery, and excellent CO2 adsorption capacity.
Article
Nanoscience & Nanotechnology
Harpreet Singh Gujral, Mohammed Fawaz, Stalin Joseph, C. Sathish, Gurwinder Singh, Xiaojiang Yu, Mark B. H. Breese, Jiabao Yi, Mandeep Singh, Vipul Bansal, Ajay Karakoti, Ajayan Vinu
Summary: This study reports a method for preparing nanoporous titanium carbonitride using a high-nitrogen-containing mesoporous carbon nitride as a template. The prepared samples show high nanoporosity and exhibit high electrocatalytic activity in acidic medium, similar to commercially available platinum catalysts.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Physical
Harpreet Singh Gujral, Gurwinder Singh, Jae Hun Yang, C. I. Sathish, Jiabao Yi, Ajay Karakoti, Mohammed Fawaz, Kavitha Ramadass, Ala'a H. Al-Muhtaseb, Xiaojiang Yu, Mark B. H. Breese, Ajayan Vinu
Summary: Transition metal nitrides have attracted much attention due to their unique structure and electrical properties, and they have great potential for electrocatalytic applications. This study successfully synthesized highly crystalline and mesoporous titanium carbonitride (MTiCN) materials using a combination of reactive templating approach and doping. The optimized MTiCN material exhibited considerable electrocatalytic hydrogen evolution reaction (HER) activity, which is close to the performance of commercial platinum/carbon catalysts. This work provides a simple solution for the rational design of porous transition metal carbon nitrides with excellent electrocatalytic properties.
Article
Medicine, Legal
Thomas Calligaro, Agnieszka Banas, Krzysztof Banas, Iva Bogdanovic Radovic, Marko Brajkovic, Massimo Chiari, Anne-Maija Forss, Irka Hajdas, Matea Krmpotic, Anna Mazzinghi, Eva Menart, Kenichiro Mizohata, Markku Oinonen, Laurent Pichon, Jyrki Raisanen, Zdravko Siketi, Ziga Smit, Aliz Simon
Summary: This paper outlines the results of using nuclear analytical techniques to detect forged works of art. By employing various analysis techniques, the materials of the paintings were examined, and a combination of these techniques enabled the accurate determination of the authenticity and history of the paintings.
FORENSIC SCIENCE INTERNATIONAL
(2022)
Article
Multidisciplinary Sciences
B. L. Ong, K. Jayaraman, C. Diao, T. J. Whitcher, A. Jain, H. Hung, M. B. H. Breese, E. S. Tok, A. Rusydi
Summary: Researchers report strong ferromagnetism of quasiparticle doped holes within the ab-plane and along the c-axis of Cu-O planes in low-dimensional Au/d-La1.8Ba0.2CuO4/LaAlO3(001) heterostructures. The ferromagnetism is stronger at a hole doped peak and at an upper Hubbard band of O with a spin-polarization degree of up to 40%, indicating strong ferromagnetism of Mottness.
NATURE COMMUNICATIONS
(2022)
Article
Instruments & Instrumentation
X. J. Yu, X. Chi, T. Smulders, A. T. S. Wee, A. Rusydi, M. Sanchez del Rio, M. B. H. Breese
Summary: This article introduces the use of crystals and gratings in monochromators for synchrotron radiation beamlines, as well as the limitations of common perfect crystals and gratings in the intermediate range. It also presents a method to evaluate crystal performance using tools like ray-tracing and an upgrade for simulating high d-spacing crystals.
JOURNAL OF SYNCHROTRON RADIATION
(2022)
Article
Biochemistry & Molecular Biology
Lynn Chua, Agnieszka Banas, Krzysztof Banas
Summary: ATR-FTIR microscopy and O-PTIR spectroscopy are valuable techniques for analyzing complex paint cross-sections in cultural heritage. O-PTIR has the advantage of resolving degradation compounds at sub-micron resolution, surpassing the limitations of ATR-FTIR.
Article
Physics, Applied
Chi Sin Tang, Shengwei Zeng, Caozheng Diao, Jing Wu, Shunfeng Chen, Mark B. H. Breese, Chuanbing Cai, Thirumalai Venkatesan, Ariando Ariando, Andrew T. S. Wee, Xinmao Yin
Summary: The effects of atomic-scale disorder and charge (de)localization are of great importance in condensed matter systems and provide insights into the role of strong and weak correlations. In this study, researchers found that 2D free electrons were localized in the specific hybridized states at the LaAlO3/SrTiO3 interface. The localization of 2D electrons could be induced through temperature reduction or ionic liquid gating. Interfacial hybridization was found to play a crucial role in regulating the localization effects. This study not only highlights the importance of interfacial hybridization but also offers a new approach for device fabrication in amorphous film systems.
APPLIED PHYSICS REVIEWS
(2022)
Article
Chemistry, Multidisciplinary
Shulun Han, Chi Sin Tang, Linyang Li, Yi Liu, Huimin Liu, Jian Gou, Jing Wu, Difan Zhou, Ping Yang, Caozheng Diao, Jiacheng Ji, Jinke Bao, Lingfeng Zhang, Mingwen Zhao, Milorad V. Milosevic, Yanqun Guo, Lijun Tian, Mark B. H. Breese, Guanghan Cao, Chuanbing Cai, Andrew T. S. Wee, Xinmao Yin
Summary: The recently discovered kagome topological superconductor AV(3)Sb(5) (A = K, Rb, Cs) has a unique structural motif that can host diverse topologically non-trivial phenomena. It remains unclear how atomic-level properties and many-body effects contribute to these symmetry-breaking phenomena. In this study, the role of V3d-Sb5p orbital hybridization in mediating the CDW phase transition in CsV3Sb5 is reported. The results highlight the critical role of Sb orbitals and establish orbital hybridization as the direct mediator of the CDW states and structural transition dynamics in kagome unconventional superconductors.
ADVANCED MATERIALS
(2023)
Article
Biochemistry & Molecular Biology
Agnieszka M. Banas, Krzysztof Banas, Mark B. H. Breese
Summary: In this study, the use of Fourier Transform Infrared (FTIR) spectroscopy and statistical multivariate analysis techniques successfully identified high explosive (HE) materials (C-4, TNT, and PETN) in residues after high- and low-order explosions. The data pre-treatment process and the application of various machine learning classification techniques, including the hybrid LDA-PCA method implemented using the R environment, are also described.
Article
Electrochemistry
Jang Mee Lee, Stalin Joseph, Ian Chirchir Bargoria, Sungho Kim, Gurwinder Singh, Jae-Hun Yang, Kavitha Ramadass, Rohan Bahadur, Xiaojiang Yu, Mark Bh Breese, Jiabao Yi, Ajayan Vinu
Summary: Successful synthesis of the hybrid of N-rich CN and Fe1-xS was achieved by constructing a stable CN-Fe1-xS heterointerface, demonstrating promising performance in batteries.
BATTERIES & SUPERCAPS
(2022)
