Article
Multidisciplinary Sciences
Marcus Albrechtsen, Babak Vosoughi Lahijani, Rasmus Ellebaek Christiansen, Vy Thi Hoang Nguyen, Laura Nevenka Casses, Soren Engelberth Hansen, Nicolas Stenger, Ole Sigmund, Henri Jansen, Jesper Mork, Soren Stobbe
Summary: This study integrates fabrication constraints into topology optimization to achieve the strongest light-matter interaction in a photonic nanocavity. The researchers demonstrated a nanocavity with a small mode volume, high quality factor, and compact footprint, using near-field optical measurements.
NATURE COMMUNICATIONS
(2022)
Review
Chemistry, Multidisciplinary
Salman Ullah, Sijie Pian, Fang Dai, Yilun Wang, Yaoguang Ma, Qing Yang
Summary: This article reviews the basic technology and research progress of single-mode semiconductor nanowire lasers, elaborates on the key methods and development of different types of coupling to achieve single-mode laser output, and summarizes the challenges faced by each scheme.
FRONTIERS IN CHEMISTRY
(2021)
Article
Engineering, Electrical & Electronic
Xun Yu, Shuang Wang, Junfeng Jiang, Kun Liu, Jie Dong, Peng Zhang, Wen Wu, Tiegen Liu
Summary: A hybrid sapphire dual-Fabry-Perot-cavities sensor was designed for high temperature and refractive index measurement, utilizing a series of sapphire components for the interferometer and demonstrating high sensitivities through experimental tests.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Optics
A. S. Kucheryavenko, V. A. Zhelnov, D. G. Melikyants, N. Chernomyrdin, S. P. Lebedev, V. V. Bukin, S. Garnov, V. N. Kurlov, K. I. Zaytsev, G. M. Katyba
Summary: To tackle the challenge of super-resolution terahertz endoscopy, this paper proposes the use of an antiresonant hollow-core waveguide coupled with a sapphire solid immersion lens (SIL) for subwavelength confinement of guided mode. The optimized geometry of the PTFE-coated sapphire tube waveguide ensures high optical performance, while the judicious design and fabrication of the bulk sapphire crystal SIL, mounted at the output end of the waveguide, allows for a focal spot diameter of approximately 0.2 lambda at a wavelength of lambda = 500 mu m. This confirms the super-resolution capabilities of the proposed endoscope, surpassing the Abbe diffraction limit.
Article
Chemistry, Multidisciplinary
Romain Bude, Ivan Verschueren, Ileana Florea, Jean-Luc Maurice, Pierre Legagneux, Lino M. C. Pereira, Harsh Bana, Renan Villarreal, Raoul Blume, Axel Knop-Gericke, Travis Jones, Didier Pribat
Summary: This study explores the synthesis of TMDC films by ion implantation of parent TMDC atoms into a chemically neutral substrate. The results show that the implantation dose and order of implantation are important parameters for the formation of MoS2 crystals with different thicknesses and locations.
Article
Physics, Multidisciplinary
Lijie Huang, Lin Li, Zhen Shang, Mao Wang, Junjie Kang, Wei Luo, Zhiwen Liang, Slawomir Prucnal, Ulrich Kentsch, Yanda Ji, Fabi Zhang, Qi Wang, Ye Yuan, Qian Sun, Shengqiang Zhou, Xinqiang Wang
Summary: This study demonstrates the structural and optical properties of non-polar a-plane GaN epitaxial films modified by Si ion implantation. Increasing Si fluences lead to higher n-type dopant concentration and vacancy density. Despite enhanced structural disorder, the epitaxial structure remains intact, with observed lattice expansion along the a direction and quenching of yellow emission in the grown sample due to irradiation-induced generation of non-radiative recombination centers.
Article
Engineering, Chemical
Jie Qiao, Wenbiao Ma, Xiao Du, Xuli Ma, Zhong Liu, Jun Li, Guoqing Guan, Abuliti Abudula, Xiaogang Hao
Summary: In this work, a nano-porous carbon material with confined sub-nanometer pores was synthesized for the selective electrochemical separation of chloride ions (Cl-). The carbon material exhibited high uptake capacity and selectivity, fast uptake/release ability, and good cycling stability, making it a promising material for the selective separation of Cl- from wastewater.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Sandeep Dalal, R. Raman, P. Senthil Kumar, Akhilesh Pandey
Summary: In this study, the effect of hydrogen ion implantation on non-polar a-plane GaN epitaxial layer on a sapphire substrate was investigated. Structural and optical characterizations revealed that ion implantation induced lattice distortion, which was partially reduced after annealing. The annealed a-plane GaN thin layer could be easily transferred to other substrates and potentially used in electronic and optoelectronic devices.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Chemistry, Multidisciplinary
Fangmeng Sheng, Bin Wu, Xingya Li, Tingting Xu, Muhammad A. Shehzad, Xiuxia Wang, Liang Ge, Huanting Wang, Tongwen Xu
Summary: Research demonstrates that COF membranes with a channel size of approximately 1.4 nm exhibit efficient ion sieving properties, with high monovalent cation permeation rates and low multivalent cation permeabilities.
ADVANCED MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Vladimir Smirnov, Sven Stephan, Michael Westphal, Daniel Emmrich, Andre Beyer, Armin Goelzhaeuser, Christoph Lienau, Martin Silies
Summary: Metallic nanostructures can transport electromagnetic fields as surface plasmon polaritons, enabling efficient light-matter coupling on the nanoscale. Experimental demonstration of this phenomenon using bow-tie antennas with curved line gratings highlights the importance of optical near-field coupling in achieving high transmission efficiency.
Article
Physics, Fluids & Plasmas
J. Adamek, D. Cipciar, A. Devitre, J. Horacek, J. Cavalier, M. Komm, J. Krbec, M. Tichy, D. Trunec, P. Bohm, R. Panek
Summary: This study presents a unique method for fast ion temperature measurements in the tokamak edge plasma, using a ball-pen probe to scan and fit the electron branch of the I-V characteristic. Experiments on the COMPASS tokamak showed a nearly flat ion temperature profile with a ratio of ion to electron temperature close to 1-2 during L-mode discharges.
Article
Engineering, Electrical & Electronic
Vitalii Shcherbinin, Konstantinos A. Avramidis, Manfred Thumm, John Jelonnek
Summary: The study investigates the influence of a coaxial dielectric rod on various aspects of a gyrotron cavity. It demonstrates that using a moderate-loss material for the dielectric insert can strongly attenuate cavity modes, except for those with much larger caustic radii. The proposed method for mode discrimination shows high performance and flexibility in cavity applications.
JOURNAL OF INFRARED MILLIMETER AND TERAHERTZ WAVES
(2021)
Article
Engineering, Environmental
Kun Wang, Xin Liu, Fuhua Zhao, Deyi Zhang, Yanguang Cui, Ze Yang, Xiaodong Li, Yanliang Zhang, Hongbao Su, Jianfei Wu, Changshui Huang
Summary: By using a graphdiyne thin film to encapsulate manganese dioxide nanorods, high-performance cathode materials for rechargeable aqueous zinc-ion batteries have been achieved. The unique structure and active bonds of the material contribute to fast electron/ion transport and increased ion storage, leading to improved capacity and cycling stability.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Bo-Wen Lee, Jui-Chang Lin, Ruey-Dar Chang, Che-Men Chu, Wei -Yen Woon
Summary: In this study, subamorphizing implantation of phosphorus and hydrogen was used to investigate the donor activation behavior at low temperatures for the development of three-dimensional integrated circuits. It was found that the activation efficiency of phosphorus at 0 degrees implantation angle was higher than that at 7 degrees due to the broader defect and donor profiles. Hydrogen co-implantation at a dose of 1015 cm-2 enhanced the carrier concentration at 370 degrees C, but the enhancement decayed quickly and the carrier concentration at 400 degrees C was lower than that without hydrogen. The change in activation behavior suggested that the enhancement in carrier concentration was due to defect complexes generated by hydrogen implantation.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2023)
Article
Engineering, Electrical & Electronic
Yongjian Ma, Xuanze Zhou, Wenbo Tang, Xiaodong Zhang, Guangwei Xu, Li Zhang, Tiwei Chen, Shige Dai, Chunxu Bian, Botong Li, Zhongming Zeng, Shibing Long
Summary: In this work, a high-performance beta-Ga2O3 U-shaped trench-gate metal-oxide-semiconductor field-effect transistor (UMOSFET) was demonstrated. Nitrogen ions were used to create a current blocking layer, which allowed electrons to accumulate near the U-shaped groove and form a conductive channel, promoting current generation. By modulating the concentration of implanted nitrogen ions, a UMOSFET with an applicable threshold voltage of 4.2 V was achieved. When the N ions concentration was 5 x 10^18 cm^-3, a high current density of 702.3 A/cm^2, a low on-resistance of 10.4 m Omega.cm^2, and a decent breakdown voltage of 455 V (at V_G =0 V) were obtained. The UMOSFET in this study offers great advantages in the fabrication of high-performance E-mode vertical beta-Ga2O3 MOSFETs and facilitates the development of beta-Ga2O3 power electronics devices.
IEEE ELECTRON DEVICE LETTERS
(2023)
