Article
Chemistry, Multidisciplinary
Alex E. Chen, Xue-Qun Xia, Jian-Shiung Hong, Kuan-Ren Chen
Summary: The study finds that light funneling can guide the flow of energy into subwavelength slits. In contrast to previous research on oblique incident light, this study reveals that light funneling in the slits can be highly asymmetric, even at small angles. This mechanism is explained by polarized fields and charges induced using Poynting vectors. It is shown that when light is obliquely incident to the slits perforated in a perfect electric conductor, asymmetrical fields and charges accumulate at the upper apex corners of the left (right) sides. When light is incident from the left (right) side, more (less) induced fields and charges accumulate in the left (right) slit corner, resulting in an increase (decrease) in the funneling width, area, and energy flow at the left (right) side.
Article
Optics
Danveer Singh, Sukanta Nandi, Yafit Fleger, Shany Z. Cohen, Tomer Lewi
Summary: This study investigates the optical properties of topological insulator bismuth telluride (Bi2Te3) and finds that it exhibits extremely high refractive index, capable of squeezing light in deep-subwavelength structures and providing large field enhancements. These findings demonstrate the potential of chalcogenide topological insulators for metamaterial design and nanophotonic applications in sensing, non-linear generation, and quantum information.
LASER & PHOTONICS REVIEWS
(2023)
Article
Physics, Multidisciplinary
Songsong Li, Yangyang Fu, Lei Gao, Jian-Hua Jiang, Yadong Xu
Summary: In this study, the concept of phase gradient metasurfaces is demonstrated to be a versatile approach for controlling light diffraction through small holes or slits. A single subwavelength metallic slit surrounded by air grooves of gradient depth is considered as an example. The phase gradient enables unidirectional excitation of surface plasmons, resulting in extraordinary optical transmission. Unidirectional radiation of an optical dipole inside the slit can be achieved by applying different phase gradients to both sides of the metal plate.
NEW JOURNAL OF PHYSICS
(2023)
Article
Chemistry, Physical
Alexander Ewen Chen, Jian-Shiung Hong, Kuan-Ren Chen
Summary: The dynamics of transient light transmission through a subwavelength slit can be intricate, involving complex and diverse wave functions, phase delay, and constructive/destructive interferences. The concept of step phasors is used to illuminate the underlying novel physics without involving nonlinearity, and can also be generalized to study incident light profiles and phenomena involving plasmonic metamaterials.
Article
Nanoscience & Nanotechnology
Longlong Jiang, Chenyin Xu, Xiaocheng Wu, Xue Zhao, Lijun Zhang, Guobing Zhang, Xiaohong Wang, Longzhen Qiu
Summary: Deep ultraviolet-light-stimulated artificial synaptic devices have potential applications in various fields and can simulate various synaptic behaviors. The proposed artificial synaptic structures on flexible substrates also successfully simulate typical synaptic behaviors.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Inorganic & Nuclear
Juan Xu, Zheng Lin, Yuan Lei, Xingrun Huang, Chao Chen
Summary: This study reports a water-stable, light-weight MOF-based interlayer for Li-S batteries, serving as an efficient polysulfide barrier and effectively alleviating shuttle effect to enhance battery performance.
DALTON TRANSACTIONS
(2022)
Article
Engineering, Electrical & Electronic
Lingyan Ruan, Bin Chen, Jizhou Li, Miu-Ling Lam
Summary: The study proposes a novel convolutional neural network architecture AIFNet for removing spatially-varying defocus blur from a single defocused image. It combines light field synthetic aperture and refocusing techniques and demonstrates state-of-the-art performance in both quantitative and qualitative evaluations.
IEEE TRANSACTIONS ON COMPUTATIONAL IMAGING
(2021)
Article
Engineering, Multidisciplinary
Ru Yang, Yaoke Wang, Shuheng Liao, Ping Guo
Summary: This paper presents a new deep learning method, DPPS, for recovering surface normal and height maps under varying illumination conditions. The method combines physics-based and data-driven approaches to handle reflective metal surfaces with unknown surface roughness. Experimental results show that DPPS outperforms commercial 3D scanners in accuracy and provides guidance for the application of deep learning in manufacturing.
Article
Engineering, Electrical & Electronic
Xueliang Wang, Piqiang Su, Jiahao Zou, Jieping Wu, Xiaoqing Yang
Summary: A novel sensor based on a multiunit periodic resonant structure is proposed for detecting slender cracks on a metallic surface. The sensor achieves higher detection sensitivity by reducing the surface area of the resonant structure and increasing the current flow path. It can detect metallic surface cracks with a width of 0.02 mm. The multiunit periodic structure sensor has better detection ability than the single-unit structure.
IEEE SENSORS JOURNAL
(2022)
Article
Metallurgy & Metallurgical Engineering
Z. Chen, D. P. Wang, S. Wang, Y. X. Geng, Y. X. Guo, Y. C. Wu, Z. G. Liu, Y. Y. Zhang, Y. X. Wang
Summary: The influence of ultraviolet light irradiation on the pitting corrosion performance of Zr2Ni metallic glass was investigated using electrochemical methods and immersion test in 0.05 mol/L NaCl solution. The results showed that the pitting potential of the ultraviolet light-irradiated sample shifted positively, indicating enhanced pitting corrosion resistance. The corrosion morphology and X-ray photoelectron spectroscopy analysis further confirmed the improved pitting resistance and the suppression of pit generation and growth.
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
P. Ashok, Yogesh Singh Chauhan, Amit Verma
Summary: This work demonstrates reflectance resonances in highly subwavelength partially oxidized Vanadium thin films in the near-infrared and long-wave infrared wavelengths. The observed resonances can be switched into a high-reflectance state with temperature and can be passively tuned by adjusting the oxidation duration.
Article
Optics
Yu-Zhen Mao, Chin-Ting Ho, Shiau-Cheng Shiu, Chun-Wei Liu
Summary: This study presents a highly accurate technique for measuring the centering error of a lens using power analysis. The technique utilizes a prism patterned with a subwavelength grating and a reflection-centering system using -1st-order rays. The optical axis error is tested and analyzed by a powermeter based on Snell's law and diffractive characteristics. Compared to autocollimation-based systems, this technique amplifies the resolution of the optical-centering error by a factor of 4, improving instrument sensitivity and reducing sensor requirements based on light direction or energy variation.
Article
Engineering, Electrical & Electronic
Wei Ou, Yang Mei, Daisuke Iida, Huan Xu, Minchao Xie, Yiwei Wang, Lei-Ying Ying, Bao-Ping Zhang, Kazuhiro Ohkawa
Summary: In this study, InGaN-based orange-red RCLEDs were successfully fabricated using a unique structure and technique, achieving low optical loss in the resonant cavity. The performance of the devices was validated through far-field emission observation and simulation, demonstrating the consistency between performance and design. This research is of significance for the development of displays and communication systems.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Geochemistry & Geophysics
Ping Xu, Lei Liu, Yuewei Jia, Haifeng Zheng, Chen Xu, Lingyun Xue
Summary: This article proposes a novel HSI reconstruction framework that combines model-based deep learning and fully learned deep learning reconstruction strategies. The proposed algorithm outperforms state-of-the-art methods on both simulation and real-world datasets.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2023)
Article
Environmental Sciences
Xianlin Peng, Yihao Fu, Shenglin Peng, Kai Ma, Lu Liu, Jun Wang
Summary: This paper proposes a deep mutual-learning-based framework for hyperspectral pansharpening, which effectively learns spatial and spectral features to achieve better fusion results.
Article
Biochemical Research Methods
Saara A. Khan, Chia-Ming Chang, Zain Zaidi, Wonseok Shin, Yu Shi, Audrey K. Ellerbee Bowden, Olav Solgaard
Article
Nanoscience & Nanotechnology
Yasin Buyukalp, Peter B. Catrysse, Wonseok Shin, Shanhui Fan
Article
Optics
Nathan Zhao, Sacha Verweij, Wonseok Shin, Shanhui Fan
Article
Chemistry, Multidisciplinary
Wenshan Cai, Wonseok Shin, Shanhui Fan, Mark L. Brongersma
ADVANCED MATERIALS
(2010)
Article
Optics
Wonseok Shin, Aaswath Raman, Shanhui Fan
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2012)
Article
Chemistry, Multidisciplinary
Wonseok Shin, Wenshan Cai, Peter B. Catrysse, Georgios Veronis, Mark L. Brongersma, Shanhui Fan
Article
Physics, Multidisciplinary
Aaswath Raman, Wonseok Shin, Shanhui Fan
PHYSICAL REVIEW LETTERS
(2013)
Article
Optics
Mohammad Asif Zaman, Yasin Buyukalp
OPTICAL ENGINEERING
(2019)