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Reconfigurable and polarization-dependent optical filtering for transflective full-color generation utilizing low-loss phase-change materials

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Journal of Semiconductors 2024年第7期45卷 46-53页

作者： Shuo Deng Mengxi Cui Jingru Jiang Chuang Wang Zengguang Cheng Huajun Sun Ming Xu Hao Tong Qiang He Xiangshui Miao School of Integrated Circuits Huazhong University of Science and TechnologyWuhan 430074China Hubei Yangtze Memory laboratories Wuhan 430205China School of Microelectronics Fudan UniversityShanghai 200433China

All-dielectric metasurface, which features low optical absorptance and high resolution, is becoming a promising candidate for full-color generation. However, the optical response of current metamaterials is fixed and lacks active tuning. In this work, we demonstrate a reconfigurable and polarization-dependent active color generation technique by incorporating low-loss phase change materials(PCMs) and caf_2 all-dielectric substrate. Based on the strong Mie resonance effect and low optical absorption structure, a transflective, full-color with high color purity and gamut value is achieved. The spectrum can be dynamically manipulated by changing either the polarization of incident light or the PCM state. High transmittance and reflectance can be simultaneously achieved by using low-loss PCMs and substrate. The novel active metasurfaces can bring new inspiration in the areas of optical encryption, anti-counterfeiting, and display technologies.

关键词： structural color reconfigurable all-dielectric metasurfaces phase change material

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Approach to Epidemiological Mechanism of Infection or Colonization of Egg-Laying Chicken Farms by <i>Salmonella enterica</i>Serovar Enteritidis (SE) Becoming the Main Source of Contamination in Food Poisoning (Review)

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International Journal of Clinical Medicine 2014年第7期5卷 376-392页

作者： Yukiko Toyota-Hanatani Yushi Nakagawa Toshimitsu Hatabu Yuko Miyao Hiroaki Ohta caf laboratories Fukuyama Japan Department of Animal Science Graduate School of Natural Science and Technology Okayama University Okayama Japan Department of Biotechnology Faculty of Life Science and Biotechnology Fukuyama University Hiroshima Japan The Laboratory of Veterinary Internal Medicine School of Veterinary Science Osaka Prefectural University Izumisano Japan

Salmonella enterica serovar Enteritidis (SE)-induced diarrhea in humans is the typical non-typhoid diarrhea. It develops acutely or subacutely and may be fatal. This SE infectious disease suddenly became a major public health issue worldwide in the 1980s. The main causative food material of SE food poisoning is chicken eggs, and many outbreaks of food poisoning caused by chicken eggs occurred throughout the world. SE epidemics occurred in layer farms, and this was the main cause of SE-induced food poisoning in humans. The major subject of our epidemiological study described in this report is why SE-contaminated eggs became the main causative food. In this study, we focused on difference of molecular expression for farm-isolated SEs. That is because recent studies have demonstrated that O-antigen enlargement may be related to pathogenicity in mice as well as 22-kDa polypeptide-expression (SEp22). We have discovered that many SE strains isolated from chicken farms do not express SEp22, and a deficiency or decreased level of cellular antigen 0-12 in SE strains isolated from chicken farms was clarified in a report. Additionally, SEp22 was deficient in SE strains passaged through chickens, whereas SEp22 was expressed at a high level in SE strains passaged through mice. These findings suggest that SE infection and retention more effectively occur in layer farms than in other animal maintenance environments, which may be a basis of the epidemiological hypothesis to explain the high-levelproduction of SE-contaminated eggs (the presence of mice may be the basis of the retention of SE infection in layer farms, and this may also be the mechanism causing the high-level production of SE-contaminated eggs).

关键词： Salmonella enterica Serovar Enteritidis (SE) Epidemiological Role Mouse Outbreaks

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A Kinetic Study on the Control of Nitrogen in Molten Slag and Metal

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Journal of Iron and Steel Research International 2011年第S2期18卷 301-309页

作者： Seung Min HAN Dong Joon Min Technical Research laboratories POSCO Pohang 790-785 KOREA Department of Materials Science and Engineering YONSEI University Seoul 120-749 KOREA

Nitrogen can easily contaminate molten steel during the steelmaking process and due to the low nitrogen capacity in slag, it is difficult to remove entrapped nitrogen from liquid steel. Degassing is often done to the steel at secondary steelmaking to lower the nitrogen content, but the control can often be kinetically limited by the steel grade and also the slag composition. Thus, a fundamental understanding of nitrogen dissolution into molten slag and metal including the rate of nitrogen dissolution can help in controlling nitrogen content in the final *** kinetics of nitrogen dissolution in the molten calcium aluminate based slags and in molten steel with various element additions was investigated by measuring the 14N-15N isotope exchange reaction using a mass spectrometer at 1873 *** show that effect of elements on the rate constant of nitrogen dissolution such as Ni in Fe is relatively minimal similar to molybdenum. The surface rate constant of nitrogen dissolution in liquid Fe-10%Ni alloy was found to be 3.77×10-5 (mol/cm2·s·atm).The rate constant of nitrogen dissolution in the CaO-Al2O3-caf2 slag was found to be wedge shaped, which decreased with increasing caf2 to about 20 mol% followed by an increase through the rest of the caf2 composition range. This was related to the effect of caf2 on the structure of Al-O bonds for this slag.

关键词： rate constant slag structure molten steel isotope exchange technique adsorption coefficient nitrogen surface dissolution

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