Article
Materials Science, Multidisciplinary
Arash Ahmadivand, Burak Gerislioglu
Summary: Recent research has demonstrated the emission of deep-ultraviolet and vacuum-ultraviolet light from artificially engineered meta-atoms through nonlinear harmonic signal generation processes. Optical metasurfaces have revealed various nonlinear optical phenomena in nanosystems, such as second and third harmonic generation, multiphoton luminescence, and four-wave mixing. Plasmonic and all-dielectric flatland metasurfaces allow for successful manipulation of light-matter interactions and substantial enhancement of driving fields, making them promising for efficient radiation of intense and coherent harmonic emissions.
Article
Optics
M. G. Burke, R. J. Fonck, J. M. Harlander, G. R. McKee
Summary: A broadening compensation method was developed for spatial heterodyne spectroscopy interferometric technique to reduce artificial broadening and enable high resolution measurements at a significantly higher photon flux. The compensated measurement of emission from deuterium neutrals in a tokamak plasma showed a spectral width of about 0.13 nm, 4 times smaller than the uncompensated width of 0.5 nm.
Article
Physics, Applied
Oliver S. Burrow, Paul F. Osborn, Edward Boughton, Francesco Mirando, David P. Burt, Paul F. Griffin, Aidan S. Arnold, Erling Riis
Summary: Compact vacuum systems are essential for cold atom technologies, but existing systems can be large and require active pumping. This study presents a centiliter-scale ceramic vacuum chamber that enables robust laser cooling with minimal power consumption, showing promise for wide-ranging ultracold quantum metrology applications.
APPLIED PHYSICS LETTERS
(2021)
Article
Optics
Qinda Guo, Macie J. Endzik, Magnus H. Erntsen, Antonija Grubisic-Cabo, Congl Li, Wanyu Chen, Yang Wang, Oscar T. Jernberg
Summary: We showcase and compare two approaches for selecting desired harmonics, achieving high transmission efficiency and pulse duration conservation. Both approaches are relevant for various experimental techniques. By analyzing the characteristics of focusing quality, photon flux, and temporal broadening, we find that a focusing grating provides higher transmission compared to the mirror+filter approach, with only slight temporal broadening and slightly larger spot size.
Article
Physics, Fluids & Plasmas
Liang He, Yongcai Shen, Hongming Zhang, Bo Lyu, Cheonho Bae, Huajian Ji, Chaoyang Li, Jia Fu, Xuewei Du, Fudi Wang, Qiuping Wang, Xianghui Yin, Shunkuan Wan, Bin Bin, Yichao Li, Shuyu Dai
Summary: A space-resolved vacuum-ultraviolet (VUV) spectrometer is designed to measure impurity distribution in the divertor region of tokamaks, providing good spectral resolution and reduced aberration to meet the experimental requirements.
PLASMA SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Inorganic & Nuclear
Chao Wu, Xingxing Jiang, Lin Lin, Tianhui Wu, Zheshuai Lin, Zhipeng Huang, Mark G Humphrey, Chi Zhang
Summary: The first alkali-metal selenate nonlinear optical crystal Na-5(SeO4)(HSeO4)(3)(H2O)(2) was obtained by in situ hydrothermal synthesis, showing moderate SHG response and wide-band semiconductor characteristics. The structure of the crystal is described as isolated [SeO4]/[HSeO4] tetrahedra connected by H-bonding interactions and Na-O bonds, forming a three-dimensional framework with NCS properties.
INORGANIC CHEMISTRY FRONTIERS
(2021)
Article
Engineering, Electrical & Electronic
Haoran Xu, Quinn R. Marksteiner, Bruce E. Carlsten
Summary: This article discusses theoretical and design studies on the application of an electrostatic potential depression (EPD) to traditional microwave sources, the klystron and the inductive output tube (IOT), in the UHF band. The EPD is implemented by applying a negative high voltage to a section of the metallic beam pipe, leading to improved circuit efficiency. By modulating the electron beam into bunches over a short distance within the EPD, higher peak values of the first harmonic current in the microwave tube can be achieved, suggesting potential for increased circuit efficiency.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2021)
Article
Chemistry, Inorganic & Nuclear
Jinfeng Wang, Jiaduo Wang, Jie Ding, Yajuan Wei, Jingbo Zhang
Summary: By irradiating zinc acetate precursor thin film with 172 nm VUV light, it can be directly converted into ZnO thin film. The effects of irradiation time on the properties of the prepared ZnO thin film were discussed. Using the ZnO thin film as the compact layer in DSSCs can significantly improve the photoelectric conversion efficiency.
SOLID STATE SCIENCES
(2022)
Article
Engineering, Electrical & Electronic
Zining Wang, Xiaolu Li, Tengfei Bi, Duan Li, Lijun Xu
Summary: A compact lab-built LiDAR is designed and constructed, featuring a programmable-scanning-pattern image-space scanner and a Gauss-Newton (GN) iteration-based in situ ranging system. The angular resolution of the lab-built LiDAR is evaluated using a trapezoid-fitting method, which shows satisfactory performance when compared with a commercial LiDAR. Experimental results demonstrate that the lab-built LiDAR achieves high ranging accuracy, small angular error, and fine angular resolution. The proposed LiDAR and evaluation method have potential applications in hazard detection and avoidance in aerospace.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Astronomy & Astrophysics
Subhashree Swain, Gulab Chand Dewangan, P. Shalima, Prakash Tripathi, K. V. P. Latha
Summary: We present a multiwavelength study of the active nucleus and off-nuclear X-ray sources in NGC 1365 using AstroSat, Spitzer, and Herschel. The findings reveal spectral variability in the X-ray column density, undetectable AGN in the FUV band, and a low-luminosity phase with a steady UV emission and strong X-ray absorption. The study also identifies bright spots and UV counterparts to Chandra-identified X-ray sources.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Physics, Multidisciplinary
Antonin Sainte-Marie, Luca Fedeli, Neiel Zaiem, Felix Karbstein, Henri Vincenti
Summary: The advent of petawatt-class laser systems has opened up a new era of research, enabling scientists to generate electromagnetic fields of unprecedented strength and explore unobserved processes through their interaction with the quantum vacuum. Plasma mirrors have emerged as a promising tool to bridge the gap between the capabilities and the desired intensity scale. In this study, the authors present predictions on the quantum vacuum signatures produced when intense infrared laser pulses are converted into coherently focused Doppler harmonic beams. They also explore the coupling of the focused harmonic beam with an auxiliary optical beam as a means to improve the signal to noise ratios in experiments.
NEW JOURNAL OF PHYSICS
(2022)
Article
Nanoscience & Nanotechnology
Byunggi Kim, Seungman Choi, Seung Jai Won, Yong Woo Kim, Young-Jin Kim, Seung-Woo Kim
Summary: The article introduces a solid-based noncollinear HHG scheme that achieves active control of EUV harmonic beam propagation through wavefront manipulation. It also successfully converts EUV harmonics generated by double-annular beams into Bessel vortex beams, achieving millimeter-level depth-of-focus and nanoscale spatial resolution.
Article
Instruments & Instrumentation
F. Funama, Y. Adachi, S. Tasaki, Y. Abe
Summary: A novel SANS geometry with ring-shaped collimation (r-SANS) was developed to facilitate experiments using low-flux neutron source facilities. Monte Carlo simulation studies and experimental testing at Kyoto University confirmed the feasibility and accuracy of r-SANS. The results showed high signal-to-noise ratio experiments were possible, providing consistent scattering model parameters compared to conventional methods.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2021)
Article
Chemistry, Analytical
Juanjuan Huang, Fuli Deng, Benedikt Gunther, Klaus Achterhold, Yue Liu, Andreas Jentys, Johannes A. Lercher, Martin Dierolf, Franz Pfeiffer
Summary: X-ray absorption spectroscopy is a crucial technique for catalyst characterization and is typically carried out at synchrotron facilities. This study demonstrates in situ experiments conducted on a palladium-based catalyst at a compact synchrotron facility, showcasing improved catalytic decarboxylation activity.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2021)
Article
Optics
Zijian Cui, Mingying Sun, DE'An Liu, Jianqiang Zhu
Summary: This study presents high-peak-power picosecond deep-UV laser sources and characterizes typical birefringent and nonlinear borate crystals. The demonstrated results contribute to the development of ultrahigh-peak-power deep-UV and vacuum-UV laser sources as well as important applications in high-energy-density physics, material science, and laser machining.
