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Vectorial Holograms: Full‐Color Complex‐Amplitude Vectorial Holograms Based on Multi‐Freedom Metasurfaces (Adv. Funct. Mater. 21/2020)

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Advanced Functional materials 2020年第21期30卷 2070131-2070131页

作者： Zi‐Lan Deng Mingke Jin Xuan Ye Shuai Wang Tan Shi Junhong Deng Ningbin Mao Yaoyu Cao Bai‐Ou Guan Andrea Alù Guixin Li Xiangping Li Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications Institute of Photonics Technology Jinan University Guangzhou 510632 P. R. China Department of Materials Science and Engineering Shenzhen Institute for Quantum Science and Engineering Southern University of Science and Technology Shenzhen 518055 P. R. China Photonics Initiative Advanced Science Research Center City University of New York 85 St. Nicholas Terrace New York NY 10031 USA Physics Program The Graduate Center City University of New York 365 Fifth Avenue New York NY 10016 USA Department of Electrical Engineering City College of New York New York NY 10031 USA

In article number 1910610, Zi‐Lan Deng, Guixin Li, Xiangping Li, and co‐workers show how multi‐dimensional wavefront shaping of light in amplitude, polarization, phase, and frequency can be realized simultaneously through a single layer multi‐freedom metasurface. Consequently, full‐color complex‐amplitude vectorial holographic image can be vividly reconstructed.

关键词： full‐color vectorial holograms metasurfaces multi‐dimensional manipulation

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Mineral detection of neutrinos and dark matter. A whitepaper

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Physics of the Dark Universe 2023年 41卷

作者： Baum, Sebastian Stengel, Patrick Abe, Natsue Acevedo, Javier F. Araujo, Gabriela R. Asahara, Yoshihiro Avignone, Frank Balogh, Levente Baudis, Laura Boukhtouchen, Yilda Bramante, Joseph Breur, Pieter Alexander Caccianiga, Lorenzo Capozzi, Francesco Collar, Juan I. Ebadi, Reza Edwards, Thomas Eitel, Klaus Elykov, Alexey Ewing, Rodney C. Freese, Katherine Fung, Audrey Galelli, Claudio Glasmacher, Ulrich A. Gleason, Arianna Hasebe, Noriko Hirose, Shigenobu Horiuchi, Shunsaku Hoshino, Yasushi Huber, Patrick Ido, Yuki Igami, Yohei Ishikawa, Norito Itow, Yoshitaka Kamiyama, Takashi Kato, Takenori Kavanagh, Bradley J. Kawamura, Yoji Kazama, Shingo Kenney, Christopher J. Kilminster, Ben Kouketsu, Yui Kozaka, Yukiko Kurinsky, Noah A. Leybourne, Matthew Lucas, Thalles McDonough, William F. Marshall, Mason C. Mateos, Jose Maria Mathur, Anubhav Michibayashi, Katsuyoshi Mkhonto, Sharlotte Murase, Kohta Naka, Tatsuhiro Oguni, Kenji Rajendran, Surjeet Sakane, Hitoshi Sala, Paola Scholberg, Kate Semenec, Ingrida Shiraishi, Takuya Spitz, Joshua Sun, Kai Suzuki, Katsuhiko Tanin, Erwin H. Vincent, Aaron Vladimirov, Nikita Walsworth, Ronald L. Watanabe, Hiroko Stanford Institute for Theoretical Physics Department of Physics Stanford University Stanford 94305 CA United States Istituto Nazionale di Fisica Nucleare Sezione di Ferrara via Giuseppe Saragat 1 Ferrara I-44122 Italy Mantle Drilling Promotion Office Japan Agency for Marine-Earth Science and Technology (JAMSTEC) Kanagawa Yokohama 236-0001 Japan SLAC National Accelerator Laboratory Stanford University 2575 Sand Hill Road Menlo Park 94025 CA United States Department of Physics University of Zurich Winterthurerstrasse 190 Zurich CH-8057 Switzerland Department of Earth and Environmental Sciences Graduate School of Environmental Studies Nagoya University Furo-cho Chikusa-ku Nagoya 464-8601 Japan Department of Physics and Astronomy University of South Carolina Columbia 29208 SC United States Mechanical and Materials Engineering Queen's University 130 Stuart Street Kingston K7L 2V9 ON Canada Department of Physics Engineering Physics and Astronomy Queen's University 64 Bader Lane KingstonOntario K7L 2S8 Canada Perimeter Institute for Theoretical Physics Waterloo N2J 2W9 ON Canada Istituto Nazionale di Fisica Nucleare Sezione di Milano Via Celoria 16 Milan Italy Dipartimento di Scienze Fisiche e Chimiche Università degli Studi dell'Aquila L'Aquila 67100 Italy Department of Physics University of Chicago Chicago 60637 IL United States Department of Physics University of Maryland College Park 20742 MD United States Quantum Technology Center University of Maryland College Park 20742 MD United States The William H. Miller III Department of Physics and Astronomy The Johns Hopkins University Baltimore 21218 MD United States Institute for Astroparticle Physics Karlsruhe Institute of Technology Karlsruhe 76021 Germany Earth and Planetary Sciences Stanford University Stanford 94305-2115 CA United States Texas Center for Cosmology and Astroparticle Physics Weinberg Institute for Theoretical Physics Department of Physics The University of

Minerals are solid state nuclear track detectors — nuclear recoils in a mineral leave latent damage to the crystal structure. Depending on the mineral and its temperature, the damage features are retained in the material from minutes (in low-melting point materials such as salts at a few hundred °C) to timescales much larger than the 4.5Gyr-age of the Solar System (in refractory materials at room temperature). The damage features from the O(50)MeV fission fragments left by spontaneous fission of ²³⁸U and other heavy unstable isotopes have long been used for fission track dating of geological samples. Laboratory studies have demonstrated the readout of defects caused by nuclear recoils with energies as small as O(1)keV. This whitepaper discusses a wide range of possible applications of minerals as detectors for E_R≳O(1)keV nuclear recoils: Using natural minerals, one could use the damage features accumulated over O(10)Myr–O(1)Gyr to measure astrophysical neutrino fluxes (from the Sun, supernovae, or cosmic rays interacting with the atmosphere) as well as search for Dark Matter. Using signals accumulated over months to few-years timescales in laboratory-manufactured minerals, one could measure reactor neutrinos or use them as Dark Matter detectors, potentially with directional sensitivity. Research groups in Europe, Asia, and America have started developing microscopy techniques to read out the O(1)–O(100)nm damage features in crystals left by O(0.1)–O(100)keV nuclear recoils. We report on the status and plans of these programs. The research program towards the realization of such detectors is highly interdisciplinary, combining geoscience, material science, applied and fundamental physics with techniques from quantum information and Artificial Intelligence. © 2023 Elsevier B.V.

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Luminescence of Eu^2＋ and Eu^2＋-Mn^2＋ in sodium scandium diphosphate NaScP2O7 crystal

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Journal of Rare Earths 2017年第5期35卷 453-459页

作者：张新民郑薇张宏志陈翠丽徐孝镇 School of Materials Science and Engineering Central South University of Forestry and Technology Changsha 410004 China Hunan Collaborative Innovation Center for Effective Utilizing of Wood & Bamboo Resource Changsha 410018 China Department of Physics and Interdisciplinary Program of Biomedical Mechanical & Electrical Engineering Pukyong National University Busan 608-737 Republic of Korea

In this work, the photoluminescence（PL） of NaScP2O7：Eu^2＋ and NaScP2O7：Eu^2＋,Mn^2＋ was investigated. Phase purity was checked using X-ray powder diffractometry（XRD）. PL excitation and emission spectra were recorded to elucidate the PL properties of NaScP2O7：Eu^2＋ and NaScP2O7：Eu^2＋,Mn^2＋. Furthermore, fluorescence lifetime measurements were performed. PL and lifetime measurements were carried out from 10 to 525 K. Moreover, the Eu^2＋ site occupation was discussed. It turned out that the incorporated Eu^2＋ ions substituted for Na＋ site and occupied two different sites. Temperature dependent PL measurements indicated the emission intensity decreased with increasing temperature due to temperature quenching in NaScP2O7：Eu^2＋. Fluorescence lifetimes of Eu^2＋ in NaScP2O7：Eu^2＋ almost did not change with a decay constant τ=~0.53 μs in the temperature range of 10–280 K, and then shortened due to temperature quenching. The luminescent lifetime reached ~0.05 μs at T=525 K. Finally, it was found that energy transfer occurred from Eu^2＋ to Mn^2＋ in co-doped NaScP2O7：Eu^2＋,Mn^2＋.

关键词： lifetime diffractometry luminescent diphosphate checked excitation incorporated decay elucidate luminescence

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Unified theory of thermal quenching in inorganic phosphors

arXiv

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arXiv 2019年

作者： Amachraa, Mahdi Wang, Zhenbin Tang, Hanmei Hariyani, Shruti Chen, Chi Brgoch, Jakoah Ong, Shyue Ping Materials Science and Engineering Program University of California San Diego 9500 Gilman Dr Mail Code 0418 San diegoCA92093-0448 United States Department of NanoEngineering University of California San Diego 9500 Gilman Dr Mail Code 0448 San diegoCA92093-0448 United States Department of Chemistry University of Houston College of Natural Sciences and Mathematics Science & Research Building 1 3507 Cullen Blvd Room 214 HoustonTX77204-5008 United States

We unify two prevailing theories of thermal quenching (TQ) in rare-earth-activated inorganic phosphors – the cross-over and auto-ionization mechanisms – into a single predictive model. Crucially, we have developed computable descriptors for activator environment stability from ab initio molecular dynamics simulations to predict TQ under the cross-over mechanism, which can be augmented by a band gap calculation to account for auto-ionization. The resulting TQ model predicts the experimental TQ in 29 known phosphors to within ~ 10-11%. Finally, we have developed an efficient topological approach to rapidly screen vast chemical spaces for the discovery of novel, thermally robust phosphors. Copyright © 2019, The Authors. All rights reserved.

关键词： Light emission

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Near‐Infrared Light Triggered‐Release in Deep Brain Regions Using Ultra‐photosensitive Nanovesicles

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Angewandte Chemie 2020年第22期132卷 8686-8693页

作者： Hejian Xiong Xiuying Li Peiyuan Kang John Perish Frederik Neuhaus Jonathan E. Ploski Sven Kroener Maria O. Ogunyankin Jeong Eun Shin Joseph A. Zasadzinski Hui Wang Paul A. Slesinger Andreas Zumbuehl Zhenpeng Qin Department of Mechanical Engineering The University of Texas at Dallas Richardson TX 75080 USA School of Behavioral and Brain Sciences The University of Texas at Dallas Richardson TX 75080 USA National Centre of Competence in Research in Chemical Biology 30 quai Ernest Ansermet 1211 Geneva 4 Switzerland Department of Chemical Engineering and Materials Science University of Minnesota Minneapolis MN 55455 USA Athinoula A. Martinos Center for Biomedical Imaging Department of Radiology Massachusetts General Hospital/Harvard Medical School Charlestown MA 02129 USA Nash Family Department of Neuroscience Icahn School of Medicine at Mount Sinai New York NY 10029-5674 USA Acthera Therapeutics Ltd. Peter Merian-Str. 45 4052 Basel Switzerland Department of Bioengineering The University of Texas at Dallas Richardson TX 75080 USA Center for Advanced Pain Studies The University of Texas at Dallas Richardson TX 75080 USA Department of Surgery The University of Texas at Southwestern Medical Center Dallas TX 75390 USA

Remote and minimally‐invasive modulation of biological systems with light has transformed modern biology and neuroscience. However, light absorption and scattering significantly prevents penetration to deep brain regions. Herein, we describe the use of gold‐coated mechanoresponsive nanovesicles, which consist of liposomes made from the artificial phospholipid Rad‐PC‐Rad as a tool for the delivery of bioactive molecules into brain tissue. Near‐infrared picosecond laser pulses activated the gold‐coating on the surface of nanovesicles, creating nanomechanical stress and leading to near‐complete vesicle cargo release in sub‐seconds. Compared to natural phospholipid liposomes, the photo‐release was possible at 40 times lower laser energy. This high photosensitivity enables photorelease of molecules down to a depth of 4 mm in mouse brain. This promising tool provides a versatile platform to optically release functional molecules to modulate brain circuits.

关键词： brain gold shell mechanoresponsive vesicles near-infrared light uncaging

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Pressure induced band structure evolution of halide perovskites: A first-principles atomic and electronic structure study

arXiv

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arXiv 2018年

作者： Huang, Yang Wang, Lingrui Ma, Zhuang Wang, Fei International Laboratory for Quantum Functional Materials of Henan School of Physics and Engineering Zhengzhou University Zhengzhou450001 China Materials Science and Engineering Program University of California San Diego San DiegoCA92093 United States Key Laboratory of Materials Physics of Ministry of Education School of Physics and Engineering Zhengzhou University Zhengzhou450001 China

Density functional theory (DFT) based calculations have been conducted to draw a broad picture of pressure induced band structure evolution in various phases of organic and inorganic halide perovskite materials. Under a wide range of pressure applied, distinct band structure behaviors including magnitude change of band gap, direct-indirect/indirect-direct band gap transitions and CBM/VBM shifts, have been observed between organic and inorganic perovskites among different phases. Through atomic and electronic structure calculations, band gap narrowing/widening has been rationalized through crystal orbitals coupling transformations;direct-indirect mutual transitions were explained based on structural symmetry evolution;different VBM/CBM shifts behaviors between organic and inorganic perovskites were analyzed focusing on orientation and polarity of molecules/atoms outside the octahedrals. These results provide a comprehensive guidance for further experimental investigations on pressure engineering of perovskite materials. Copyright © 2018, The Authors. All rights reserved.

关键词： Perovskite

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Magnetic properties and chemical state of nickel doped Cu FeO 2 delafossite oxide powders prepared by sol-gel method

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materials Today: Proceedings 2018年第5期5卷 10932-10939页

作者： Teerakorn Kongkaew Asawin Sinsarp Tanakorn Osotchan Wanwisa Limphirat Kittitat Subannajui Materials Science and Engineering Program Faculty of Science Mahidol University 273 Rama VI Road Phayathai Bangkok 10400 Thailand Physics Department Faculty of Science Mahidol University 273 Rama VI Road Phayathai Bangkok 10400 Thailand Synchrotron Light Research Institute 111 University Avenue Muang District Nakhon Ratchasima 30000 Thailand

Nickel doped CuFeO 2 were synthesized by using sol-gel method and two steps heat annealing. The first annealing was executed at 500°C in air to transform the dried gels into spinel oxide phases and the second one was done at 800°C in argon to transform the spinel oxide phase into the delafossite oxide phase. The crystal orientation and the morphology of nanostructure of annealed samples were investigated. Result revealed that CuFe 1-x Ni x O 2 samples are hexagonal delafossite structure and the average grain size is 0.258 – 0.760 µm. The CuFeO 2 sample exhibited the paramagnetic behavior. The CuFe 1-x Ni x O 2 (x = 0.01–0.05) samples exhibited a weak ferromagnetic behavior and a linear paramagnetic behavior upon hysteresis was observed. The maximum of coercivity, remanence and area of hysteresis loop were 26.06 mT, 1.84x10 -4 a.u. and 39.63x10 -3 , respectively. In addition, the valence states of delafossite oxide were also characterized. The results suggest that Cu oxidation state of mixture between Cu + and Cu 2+ ions, Fe oxidation state of Fe 3+ as majority ions and Ni oxidation state of Ni 2+ ions.

关键词： Sol-gel method Magnetic properties XANES Delafossite oxides

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Thermal conductivity of polymers and polymer nanocomposites

arXiv

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arXiv 2018年

作者： Huang, Congliang Qian, Xin Yang, Ronggui School of Electrical and Power Engineering China University of Mining and Technology Xuzhou221116 China Department of Mechanical Engineering University of Colorado BoulderCO80309 United States Materials Science and Engineering Program University of Colorado BoulderCO80309 United States

Polymers are widely used in industry and in our daily life because of their diverse functionality, light weight, low cost and excellent chemical stability. However, on some applications such as heat exchangers and electronic packaging, the low thermal conductivity of polymers is one of the major technological barriers. Enhancing the thermal conductivity of polymers is important for these applications and has become a very active research topic over the past two decades. In this review article, we aim to: 1). systematically summarize the molecular level understanding on the thermal transport mechanisms in polymers in terms of polymer morphology, chain structure and inter-chain coupling;2). highlight the rationales in the recent efforts in enhancing the thermal conductivity of nanostructured polymers and polymer nanocomposites. Finally, we outline the main advances, challenges and outlooks for highly thermal-conductive polymer and polymer nanocomposites. Copyright © 2018, The Authors. All rights reserved.

关键词： Nanocomposites

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Corrigendum to "Risk Assessment of Fishing Trawl Activities to Subsea Pipelines of Sabah and Labuan Waters"

TheScientificWorldJournal

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TheScientificWorldJournal 2020年第1期2020卷 7014928页

作者： Ahmad Faizal Ahmad Fuad Mohd Hafizi Said Khalid Samo Mohd Asamudin A Rahman Mohd Hairil Mohd Ismail Zainol Nautical Science Program Faculty of Maritime Studies Universiti Malaysia Terengganu Kuala Nerus 21030 Terengganu Malaysia. Maritime Technology Program Faculty of Ocean Engineering Technology and Informatics Universiti Malaysia Terengganu Kuala Nerus 21030 Terengganu Malaysia. Universiti Kuala Lumpur Institute of Marine Engineering Technology Dataran Industri Teknologi Kejuruteraan Marin Bandar Teknologi Maritim Jalan Pantai Remis Lumut 32200 Perak Malaysia.

[This corrects the article DOI: 10.1155/2020/6957171.].

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Numerical Analysis of QCW-Laser-Based Spot-Beam Crystallization of Si Films

Numerical Analysis of QCW-Laser-Based Spot-Beam Crystallizat...

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SID Symposium, Seminar, and Exhibition 2017, Display Week 2017

作者： Pann, Wenkai Song, Ruobing Suresh, Akhilesh K. Wong, Vernon K. Yu, Miao Choi, Insung Im, James S. Program in Materials Science and Engineering Department of Applied Physics and Applied Mathematics Columbia University New YorkNY United States

ISBN: (纸本)9781510848757

We are in the process of developing a new laser annealing method referred to as Spot-Beam Crystallization (SBC). The SBC method, which is potentially well suited for manufacturing advanced ultra-high-resolution AMOLED displays, is most effectively implemented using ultra-high- frequency quasi-continuous-wave (QCW) pulsed lasers. Conceptually and physically, this QCW-laser-based SBC (Q- SBC) approach builds on a thermally additive utilization of multiple short-lived ultra-high-frequency pulses, achieved via overlapped scanning of a small spot beam to incrementally and gradually heat and melt the beam-irradiated region. Using an updated version of a previously developed numerical program, we have carried out a simulation-based investigation to quantitatively examine and evaluate the basic tenets of the approach relevant specifically to partial-melting-based "ELA- like" crystallization of small-columnar-grained polycrystalline Si films using the Q-SBC method. The results from the effort to date as reported in this paper (1) largely confirm and validate the viability of the Q-SBC approach, and (2) suggest some specific directions for optimal development of the Q-SBC equipment and process. © 2017 SID.

关键词： Continuous wave lasers

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