Article
Environmental Sciences
Hengyi Liu, Daohong Wang, Wansheng Dong, Weitao Lyu, Bin Wu, Qi Qi, Ying Ma, Lyuwen Chen, Yan Gao
Summary: This article introduces a time delay calibration technique to solve the problem of increased noises in broadband lightning interferometer data when reducing the length of the data analysis window. The locating performances using different analysis window lengths were compared and analyzed, and it was found that the time delay calibration can greatly reduce ineffective locating results by improving the correlation of signals within the analysis window. The article also analyzed the locating results at the smallest analysis window ever reported and showed that the time delay calibration method ensures computational stability even at such a small window.
Article
Engineering, Electrical & Electronic
Eric Kwiatkowski, Jose Antonio Estrada, Ana Lopez-Yela, Zoya Popovic
Summary: This article discusses the application and challenges of broadband rectenna arrays in RF energy harvesting, comparing the design methodologies of narrowband and broadband arrays. It showcases the differences between narrowband satellite signal collection on the ground and the collection of multiple broadband signals through examples.
PROCEEDINGS OF THE IEEE
(2022)
Article
Engineering, Electrical & Electronic
Shuxin Ming, Jinyao Yang, Jin Zhou
Summary: This article presents a new switched-LC circuit that acts as an RF delay line. It has long maximum delays, fine delay tuning steps, and wide instantaneous bandwidths while being low loss and highly linear. The introduction of inductors provides a new degree of freedom, allowing it to operate at higher RF with wider instantaneous bandwidth.
IEEE JOURNAL OF SOLID-STATE CIRCUITS
(2022)
Article
Optics
Wei Wang, Yue Ban, Xi Chen
Summary: In this study, a method to improve the length of broadband polarization retarders is proposed by inversely engineering the relative refractive indices and optimizing them with respect to the perturbation of input wavelength. The results show that this method integrates efficiency and robustness, providing an advantage compared to traditional methods.
Article
Physics, Applied
Papa K. Amoah, Pengtao Lin, Helmut Baumgart, Rhonda R. Franklin, Yaw S. Obeng
Summary: This paper demonstrates the feasibility of using contactless broadband dielectric spectroscopy (BDS) in gas monitoring to avoid errors introduced by imperfect contacts. The study also shows that radio frequency propagation characteristics can be applied to investigate discrete processes on MO sensing materials when exposed to redox-active gases, providing new mechanistic insights that are inaccessible with traditional resistance-based measurements.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Optics
Bozhang Dong, Mario Dumont, Osama Terra, Heming Wang, Andrew Netherton, John E. Bowers
Summary: Frequency-modulated (FM) laser combs, generated through spatial hole burning, group velocity dispersion, Kerr nonlinearity, and four-wave mixing (FWM), have applications in wavelength-division multiplexing, precision metrology, and ultrafast optical ranging. In this study, a 60 GHz quantum-dot (QD) modelocked laser capable of generating both amplitude-modulated (AM) and FM combs was developed. The Kerr nonlinearity was engineered to improve FM comb bandwidth without the need for group velocity dispersion (GVD) engineering. The QD platform demonstrated a maximum 3-dB bandwidth of 2.2 THz, paving the way for energy-efficient frequency combs in silicon photonic integrated circuits (PICs).
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Optics
Changjia Chen, Calvin Xu, Arash Riazi, Eric Y. Zhu, Alexey Gladyshev, Peter G. Kazansky, Li Qian
Summary: This Letter presents a polarization-entangled photon-pair source based on type-II SPDC in PPSF at O-band, showing a broad emission bandwidth exceeding 130 nm. Experimental results demonstrate short biphoton correlation time and Hong-Ou-Mandel interference dip with high fidelity to a maximally entangled state.
Article
Optics
Yiran Wang, Xiancui Su, Yiyan Xie, Feilong Gao, Santosh Kumar, Qinglin Wang, Cailong Liu, Bingyuan Zhang, Baitao Zhang, Jingliang He
Summary: This study demonstrates the generation of ultra-short pulses from a Kerr-lens mode-locked Yb:CALGO oscillator, achieving pulse durations corresponding to approximately 4.8 optical cycle pulses. The dispersion compensation using a prism pair combined with broadband chirp mirrors played a key role in achieving the shortest pulse durations through a Yb-doped bulk oscillator.
Article
Engineering, Multidisciplinary
Yago Arosa, Carlos Damian Rodriguez-Fernandez, Alejandro Doval, Elena Lopez Lago, Raul de la Fuente
Summary: The uncertainties of refractive and group index in dispersion measurement by spectrally resolved white light interferometry were analyzed in depth. The study identified the contributions of various parameters affecting these indices, presented results for a fused silica sample, and established the effects that most deteriorate measurement accuracy. Finally, the total uncertainty of the two indices was determined by quadratically combining the different contributions.
Article
Optics
Wenye Ji, Tong Cai, Zheng Xi, Paul Urbach
Summary: This paper presents a broadband highly efficient achromatic transmission in the microwave region using a metasurface. It achieves independent control of phase and dispersion by designing a polarization selective grating metasurface and a split ring slot metasurface. Experimental results confirm the effectiveness of this strategy in designing achromatic devices.
LASER & PHOTONICS REVIEWS
(2022)
Article
Optics
Niklas Mueller, Florian Nicolai, Tiago Buckup
Summary: This study determines the spectral phase of ultra-broadband MIR pulses over more than 1000 cm(-1) using two variants of the d-scan method. Both variants allow for detecting high signals through the interaction of MIR and NIR pulses. The dual d-scan method imprints phases on both pulses, while the Xd-scan method disperses only the NIR pulses.
Article
Engineering, Electrical & Electronic
Ashif A. Fathnan, Toufiq M. Hossain, Dadin Mahmudin, Yusuf Nur Wijayanto, David A. Powell
Summary: This study reports the characterization of an achromatic focusing metasurface at oblique incident angles. It is found that in addition to off-axis aberrations caused by the hyperbolic phase profile, the focusing performance is significantly degraded due to angular dispersion of the meta-atoms. Point dipole models are used to investigate the relationship between the angular and spectral bandwidth of meta-atoms and the metasurface focusing performance. It is confirmed that the angular dispersion is the dominant mechanism in determining off-axis aberrations.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Optics
Weiying Rao, Weiyu Dai, Xun Cai, Shangwu Yang, Dongrui Xiao, Hongyan Fu, LiYang Shao
Summary: This paper presents and demonstrates a multiplexed sensing interrogation technique based on a flexibly switchable multi-passband RF filter and Solc-Sagnac loop, showing the capability to monitor multiple environmental parameters simultaneously, achieve temperature sensing, and exhibit good sensing performance and stability.
Article
Instruments & Instrumentation
Dong-Geun Lee, K. C. Lee, J. -W. Juhn, Jae-seok Lee, Y. -c. Ghim
Summary: Conventional dispersion interferometers face challenges in focusing and overlapping laser beams, prompting the development of a new single crystal dispersion interferometer. Installed on KSTAR, this new system aims to address issues encountered with traditional interferometers to measure line integrated electron densities.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2021)
Article
Optics
T. J. Zimmerling, S. Afzal, V. Van
Summary: Floquet topological photonic insulators provide more flexibility for controlling and trapping light than undriven topological insulators, and can enable novel nonlinear optics applications. In this study, resonance-enhanced frequency generation by four-wave mixing of Floquet bulk modes was demonstrated in a 2D silicon Floquet microring lattice using a resonance effect called Floquet Defect Mode Resonance (FDMR), showing potential for robust light sources on a topologically protected photonic platform.
Review
Chemistry, Multidisciplinary
Kaisong Xiang, Fenghua Shen, Yingxue Fu, Lin Wu, Zhujiang Wang, Huimin Yi, Xudong Liu, Pingshan Wang, Min Liu, Zhang Lin, Hui Liu
Summary: By manipulating the adsorption capability and configuration, surface coverage, and re-coupling efficiency on copper-based catalysts, C-C coupling to form high-value multi-carbon products can be promoted. Additionally, advanced characterization techniques aid in studying the mechanism of C-C coupling in the CO2 reduction reaction.
ENVIRONMENTAL SCIENCE-NANO
(2022)
Article
Chemistry, Multidisciplinary
Guotao Wang, Yunna Yang, Hui Liu, Mingzhao Chen, Zhiyuan Jiang, Qixia Bai, Jie Yuan, Zhilong Jiang, Yiming Li, Pingshan Wang
Summary: Researchers have successfully constructed tessellated triangle and tessellated octahedron structures using metal-organic modules as panels through modular synthesis. These structures have complex hierarchical architectures and exhibit electrochemical reduction activity for CO2 to CO after hybridization with carbon nanotubes.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Inorganic & Nuclear
Min -Ya Yu, Liang-Huan Xu, Zhike Zhang, Zhiwei Qiao, Peiyang Su, Pingshan Wang, Ting-Zheng Xie
Summary: This study presents a new class of supramolecules that can selectively detect formaldehyde. The supramolecules undergo a specific reaction, resulting in a visible fluorescence change from yellow to green-yellow, enabling efficient detection of formaldehyde.
INORGANIC CHEMISTRY
(2022)
Review
Physics, Applied
Albina Jetybayeva, Nikolay Borodinov, Anton V. Ievlev, Md Inzamam Ul Haque, Jacob Hinkle, William A. Lamberti, J. Carson Meredith, David Abmayr, Olga S. Ovchinnikova
Summary: Imaging mass spectrometry (IMS) is a powerful analytical technique used in various fields that provides qualitative compositional analysis and spatial mapping. The combination of mass spectra with spatial information produces large high-dimensional datasets, making automated computational methods crucial for exploratory analysis.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Min-Ya Yu, Yu-Ming Guan, Qixia Bai, Peiyang Su, Pingshan Wang, Ting-Zheng Xie
Summary: A new type of coordination-driven cuboctahedron cage was presented to study the fluorescent behavior of quantitatively confined aggregation-induced emission (AIE) molecules in a giant cavity. The cage, with 12 AIE molecules anchored endohedrally linked with different-length alkyl chains, exhibited strong fluorescence in highly diluted conditions. The fluorescence quantum yield could be altered by prolonging the length of alkyl chains. This study has great potential applications in biology mimic and fluorescent microscopes utilizing confined or isolated fluorescent methods.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Guotao Wang, Qixia Bai, Hui Liu, Zhengguang Li, Zhiyuan Jiang, Zhe Zhang, Yiming Li, Pingshan Wang
Summary: We achieved the adjustable self-assembly of metallosupramolecular cages by utilizing the steric hindrance effect, which allows for the precise control of their shape and size.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Qixia Bai, Zhiyuan Jiang, Yuming Guan, Qingwu Long, Bokai Liao, Ting-Zheng Xie, Tun Wu, Zhe Zhang, Pingshan Wang
Summary: In this study, a decametric metal-organic cage, pentagonal prism Mn20LC10, was developed based on Tpy-Mn(II)-Tpy connectivity, with Mn(II) serving as a linker to provide good photosensitivity. This metal-organic cage exhibited enhanced 1O2 production, fast conversion time, recyclability, and substrate versatility in the photooxidation of benzaldehyde due to improved intersystem crossing ability. Remarkably, the abundant active sites of Mn20LC10 enabled its photooxidation under solvent-free and daylight conditions. This work offers potential approaches for the development of inexpensive, green, and low-cost photosensitizer systems.
INORGANIC CHEMISTRY
(2023)
Article
Multidisciplinary Sciences
Qiong Yang, Hongchao Ji, Zhenbo Xu, Yiming Li, Pingshan Wang, Jinyu Sun, Xiaqiong Fan, Hailiang Zhang, Hongmei Lu, Zhimin Zhang
Summary: This study proposes a fast and accurate spectrum matching method called FastEI, which improves the accuracy and speed of matching by using Word2vec spectral embedding and hierarchical navigable small-world graph. The study shows that FastEI achieves a speedup of two orders of magnitude compared with the commonly used weighted cosine similarity method and achieves high accuracy when identifying compounds using a million-scale in-silico library.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Qixia Bai, Yu-Ming Guan, Tun Wu, Ying Liu, Zirui Zhai, Qingwu Long, Zhiyuan Jiang, Peiyang Su, Ting-Zheng Xie, Pingshan Wang, Zhe Zhang
Summary: We report a terpyridine-based metallo-cage that can undergo controlled hierarchical self-assembly of superstructures in response to different halide ions. By adding Cl-/Br- or I-, drastically different hierarchical superstructures with highly-tight hexagonal packing or graphite-like packing arrangements, respectively, have been achieved. These unusual halide-ion-triggered hierarchical structural changes provide new insights into the mechanism of supramolecular aggregation and crystal growth.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Inorganic & Nuclear
Wanying Zhong, Zhantao Wang, Wei-Dong Yu, Ning Wang, Fan Fu, Jun Wang, He Zhao, Die Liu, Zhilong Jiang, Pingshan Wang, Mingzhao Chen
Summary: In the field of metallo-supramolecular assemblies, supramolecular macrocycles with guest recognition and catalytic properties have attracted attention. This study presents a novel strategy for constructing giant hollow macrocyclic structures using a bi-directional geometric constraint strategy. By designing two terpyridine-based tetratopic organic ligands with different angles, the mutual interaction between the ligands promotes the formation of giant hollow macrocyclic supramolecular architectures. The self-assembly mechanism and hierarchical self-assembly of the giant supramolecular macrocycles are characterized by NMR, ESI-MS, and TEM experiments.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Kaixiu Li, Jian Huang, Shi-Cheng Wang, Zhengguang Li, Jun Wang, Yiming Li, Mingzhao Chen, Yi-Tsu Chan, Die Liu, Pingshan Wang
Summary: A terpyridine-based supramolecular cage was synthesized by the self-assembly of a hexapodal metal-organic ligand with Zn2+. The cage exhibited large parallel planes with a diameter close to 6 nm and a face-to-face distance close to 3.5 nm, and it possessed a large cavity. Various spectroscopic techniques and microscopy measurements supported the formation of the supramolecular cage. Furthermore, the corresponding metal-organic gel showed good adsorption performance for dye molecules.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Yu-Ming Guan, Qixia Bai, Zhe Zhang, Tun Wu, Ting-Zheng Xie, Pingshan Wang
Summary: In this study, a truncated triangular prism with D3h symmetry was successfully constructed using a ligand with both cis- and trans-configurations upon coordination with metal. This work provides new ideas and methods for the future synthesis of low-symmetry topological supramolecules.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Multidisciplinary
Yang Liu, Zhiyuan Jiang, Yuming Guan, Qixia Bai, Zhe Zhang, Yiming Li, He Zhao, Ting-Zheng Xie, Ming Wang, Pingshan Wang, Tun Wu
Summary: The allosteric effect is crucial in metabolic regulation, but organizing synthetic receptors into supramolecular structures with different conformations and functions in response to external stimuli is challenging. In this study, quadruple-stranded helicates were generated through the templation effect of halide ions in a library of metallo-macrocycles, and their structures and properties were characterized.
CELL REPORTS PHYSICAL SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Junjuan Shi, Meng Li, Haoyue Su, Qixia Bai, Ningxu Han, Xin-Qi Hao, Fang Fang, Zhe Zhang, Pingshan Wang, Benhua Ma, Ming Wang
Summary: Two metallo-triangles with cis-TPE motifs were constructed and their fluorescence properties in the aggregated state were explored. It was found that the shorter version showed higher quantum yields compared to the longer version.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Zhiyuan Jiang, Tun Wu, Yiming Li, Jun Wang, Mingzhao Chen, PeiYang Su, Zhe Zhang, Ting-Zheng Xie, Pingshan Wang
Summary: A novel 3D metal-organic ligand with a folded Ru(II)-connected tetrameric cycle and two sets of bisterpyridine arms was synthesized and its complexation with Zn2+ resulted in the formation of a dendritic-faced metallo-octahedron 6. Remarkably, octahedron 6 exhibited unexpected photosensitization ability, producing singlet oxygen (O-1(2)) under white light irradiation.
CHEMICAL COMMUNICATIONS
(2022)
