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16th Pacific Rim Conference on Lasers and Electro-Optics, CLEO-PR 2024

作者： Konisho, Shiori Sakamoto, Junji Imai, Hiromitsu Akatsuka, Tomoya Katori, Hidetoshi Oguri, Katsuya Hashimoto, Toshikazu Sogawa, Tetsuomi Ntt Corporation Ntt Device Technology Laboratories 3-1 Morinosato Wakamiya Kanagawa Atsugi Japan Ntt Corporation Ntt Basic Research Laboratories 3-1 Morinosato Wakamiya Kanagawa Atsugi Japan Riken Quantum Metrology Laboratory 2-1 Hirosawa Saitama Wako Japan Graduate School of Engineering The University of Tokyo Department of Applied Physics 2-11-16 Yayoi Bunkyo-ku Tokyo Japan Ntt Corporation Ntt Science and Core Technology Laboratory Group 3-1 Morinosato Wakamiya Kanagawa Atsugi Japan

We fabricated a visible multi-wavelength combiner and power splitter for optical lattice clocks (OLC) using a silica planar lightwave circuit. Magneto-optical trap was observed, which represents an important first ste... 详细信息

ISBN: (纸本)9798350372076

关键词： Optical beam splitters

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Mid-infrared dielectric response of Fermi-degenerate electron-hole droplets in diamond

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Physical Review B 2022年第23期106卷 235205-235205页

作者： J. Omachi N. Naka K. Yoshioka M. Kuwata-Gonokami Department of Applied Physics School of Engineering The University of Tokyo Hongo Bunkyo-ku Tokyo 113-0033 Japan Photon Science Center School of Engineering The University of Tokyo Yayoi Bunkyo-ku Tokyo 113-8656 Japan Core Research for Evolutional Science and Technology Agency Kawaguchi-shi Saitama 332-0012 Japan Department of Physics Kyoto University Kitashirakawa Sakyo-ku Kyoto 606-8502 Japan Department of Physics School of Science The University of Tokyo Hongo Bunkyo-ku Tokyo 113-0033 Japan

Exploring the properties of a highly quantum-degenerate electron-hole (e-h) state as a many-body system is an interesting problem in solid-state physics. Electron-hole droplets (EHDs) offer a potential platform for investigating such a state of Fermi-degenerate carriers at an extremely high density. Herein we present dielectric response measurements of carriers in the mid-infrared (MIR) region for a definitive evaluation of the dynamic properties of the e-h state of EHDs in diamond. With photoexcitation across the band-gap energy by using the two-photon absorption process, we performed time-resolved differential transmission spectroscopy by using MIR probe light and time-resolved photoluminescence spectroscopy in the deep-ultraviolet region. By linking the two temporal profiles, we overcame the problem of previous ambiguous PL analyses and elucidated the MIR dielectric response that reveals the surface plasmon resonance (SPR) of EHDs and the effect of the e-h Coulomb interaction on the dynamic dielectric response. Thus, we found that the carrier density inside EHDs remained constant at 8×1019cm−3 up to 2 ns, whereas a decay time of 1 ns of the condensed volume was found and the AC conductivity relaxation rate of 2×1014s−1 maintained during this nanosecond timescale was the highest among group-IV semiconductors. We predicted a strong dependence of the e-h scattering rate on the probe frequency in the high-frequency region in which SPR appeared, suggesting that—when probed in the low-frequency region—dynamical relaxation does not interfere with the order formation expected in quantum-degenerate e-h systems at ultralow temperatures.

关键词： Carrier dynamics Dielectric properties Excitons Time-resolved photoluminescence Ultrafast pump-probe spectroscopy

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Determination of spin Hall angle in the Weyl ferromagnet Co2MnGa by taking into account the thermoelectric contributions

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Physical Review Materials 2022年第8期6卷 084411-084411页

作者： Hironari Isshiki Zheng Zhu Hayato Mizuno Ryota Uesugi Tomoya Higo Satoru Nakatsuji YoshiChika Otani Institute for Solid State Physics University of Tokyo Kashiwa Chiba 277-8581 Japan Core Research for Evolutional Science and Technology (CREST) Japan Science and Technology Agency (JST) Saitama 332-0012 Japan Department of Physics The University of Tokyo Bunkyo-ku Tokyo 113-0033 Japan Trans-scale Quantum Science Institute University of Tokyo Bunkyo-ku Tokyo 113-0033 Japan Center for Emergent Matter Science RIKEN Wako Saitama 51-0198 Japan

The spin Hall effects of various materials, including Weyl semimetals, have been studied by the spin absorption method with the nonlocal spin valve structures. Here, we study Co2MnGa (CMG) by using the standard spin absorption method. A considerable amount of thermoelectric signal superimposes on the inverse spin Hall signal in the measurement configuration: the applied electric current between the spin injector (permalloy) and bridge (copper) wires produces heating or cooling at the interface via the Peltier effect, which causes an out-of-plane temperature gradient in CMG. As a result, a voltage signal induced by the anomalous Nernst effect (ANE) of CMG comes into the inverse spin Hall signal. We quantitatively separate these signals by combining the experiment and a numerical simulation. About 75% of the detected signal is found attributable to the thermoelectric effects. The superposing thermoelectric contribution is a general and unavoidable problem in this method when the spin Hall materials exhibit ANE. After eliminating the thermoelectric signal, the spin Hall angle of CMG turns out to be θ=−0.09 at room temperature.

关键词： Inverse spin Hall effect Spin Hall effect Spin current Spin generation Spin

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Visible Multi-Wavelength Combiner and Power Splitter for Optical Lattice Clocks with Silica Planar Lightwave Circuit

Visible Multi-Wavelength Combiner and Power Splitter for Opt...

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Pacific Rim Conference on Lasers and Electro-Optics (CLEO/Pacific Rim)

作者： Shiori Konisho Junji Sakamoto Hiromitsu Imai Tomoya Akatsuka Hidetoshi Katori Katsuya Oguri Toshikazu Hashimoto Tetsuomi Sogawa NTT Device Technology Laboratories NTT Corporation Atsugi Kanagawa Japan NTT Basic Research Laboratories NTT Corporation Atsugi Kanagawa Japan Quantum Metrology Laboratory RIKEN Wako Saitama Japan Department of Applied Physics Graduate School of Engineering The University of Tokyo Tokyo Japan NTT Science and Core Technology Laboratory Group NTT Corporation Atsugi Kanagawa Japan

ISBN: (数字)9798350372076

ISBN: (纸本)9798350372083

关键词： Atom optics Atom lasers Optical device fabrication Lattices Lasers and electrooptics Charge carrier processes Atoms

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Nucleon form factors in Nf=2+1 lattice QCD at the physical point: Finite lattice spacing effect on the root-mean-square radii

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Physical Review D 2024年第9期109卷 094505-094505页

作者： Ryutaro Tsuji Yasumichi Aoki Ken-Ichi Ishikawa Yoshinobu Kuramashi Shoichi Sasaki Kohei Sato Eigo Shintani Hiromasa Watanabe Takeshi Yamazaki Department of Physics Tohoku University Sendai 980-8578 Japan RIKEN Center for Computational Science Kobe 650-0047 Japan Core of Research for the Energetic Universe Graduate School of Advanced Science and Engineering Hiroshima University Higashi-Hiroshima 739-8526 Japan Center for Computational Sciences University of Tsukuba Tsukuba Ibaraki 305-8577 Japan Degree Programs in Pure and Applied Sciences Graduate School of Science and Technology University of Tsukuba Ibaraki 305-8571 Japan Yukawa Institute for Theoretical Physics Kyoto University Kyoto 606-8502 Japan Institute of Pure and Applied Sciences University of Tsukuba Tsukuba Ibaraki 305-8571 Japan

We present results for the nucleon form factors: electric (GE), magnetic (GM), axial (FA), induced pseudoscalar (FP), and pseudoscalar (GP) form factors, using the second PACS10 ensemble that is one of three sets of 2+1 flavor lattice QCD configurations at physical quark masses in large spatial volumes [exceeding (10 fm)3]. The second PACS10 gauge configurations are generated by the PACS Collaboration with the six stout-smeared O(a) improved Wilson quark action and Iwasaki gauge action at the second gauge coupling β=2.00 corresponding to the lattice spacing of a=0.063 fm. We determine the isovector electric, magnetic and axial radii, and magnetic moment from the corresponding form factors, as well as the axial-vector coupling gA. Combining our previous results for the coarser lattice spacing [E. Shintani et al., Phys. Rev. D 99, 014510 (2019); Phys. Rev. D 102, 019902(E) (2020)], the finite lattice spacing effects on the isovector radii, magnetic moment, and axial-vector coupling are investigated using the difference between the two results. It was found that the effect on gA is kept smaller than the statistical error of 2% while the effect on the isovector radii was observed as a possible discretization error of about 10%, regardless of the channel. We also report the partially conserved axial-vector current relation using a set of nucleon three-point correlation functions in order to verify the effect by O(a) improvement of the axial-vector current.

关键词： Lattice QCD Nucleons

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Engineering grain boundaries in monolayer molybdenum disulfide for efficient water-ion separation

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science (New York, N.Y.) 2025年第6735期387卷 776-782页

作者： Shen, Jie Aljarb, Areej Cai, Yichen Liu, Xing Min, Jiacheng Wang, Yingge Wang, Qingxiao Zhang, Chenhui Chen, Cailing Hakami, Mariam Fu, Jui-Han Zhang, Hui Li, Guanxing Wang, Xiaoqian Chen, Zhuo Li, Jiaqiang Dong, Xinglong Shih, Kaimin Huang, Kuo-Wei Tung, Vincent Shi, Guosheng Pinnau, Ingo Li, Lain-Jong Han, Yu Physical Sciences and Engineering Division (PSE) King Abdullah University of Science and Technology (KAUST) Thuwal Saudi Arabia School of Materials Science and Engineering Nanyang Technological University 50 Nanyang Avenue Singapore Department of Physics King Abdulaziz University Jeddah Saudi Arabia KAUST Catalysis Center King Abdullah University of Science and Technology (KAUST) Thuwal Saudi Arabia Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM) Nanjing Tech University (NanjingTech) Nanjing China Shanghai Applied Radiation Institute Shanghai Key Laboratory of Atomic Control and Application of Inorganic 2D Supermaterials Shanghai University Shanghai China Department of Mechanical Engineering University of Hong Kong Pok Fu Lam Road Hong Kong China Department of Civil Engineering University of Hong Kong Pok Fu Lam Road Hong Kong China Imaging and Characterization Core Lab King Abdullah University of Science and Technology (KAUST) Thuwal Saudi Arabia Department of Chemical System Engineering School of Engineering University of Tokyo Tokyo Japan Center for Electron Microscopy South China University of Technology Guangzhou China School of Emergent Soft Matter South China University of Technology Guangzhou China Catalyst Center of Excellence (CCoE) Research and Development Center Saudi Aramco Dhahran Saudi Arabia Center for Sustainability and Energy Technologies Chang Gung University Taoyuan Taiwan Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources Qinghai Institute of Salt Lakes Chinese Academy of Sciences Xining Qinghai China University of Chinese Academy of Sciences Wenzhou China

Two-dimensional (2D) materials have long been considered as ideal platforms for developing separation membranes. However, it is difficult to generate uniform subnanometer pores over large areas on 2D materials. We report that the well-defined eight-membered ring (8-MR) pores, typically formed at the boundaries of two antiparallel grains of monolayer molybdenum disulfide (MoS2), can serve as molecular sieves for efficient water-ion separation. The density of grain boundaries and, consequently, the number of 8-MR pores can be tuned by regulating the grain size. Optimized MoS2 membranes outperformed the state-of-the-art membranes in forward osmosis tests by demonstrating both ultrahigh water/sodium chloride selectivity and exceptional water permeance. Creating precise pore structures on atomically thin films through grain boundary engineering presents a promising route for producing membranes suitable for various applications.

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A proposal for removing πN-state contamination from the nucleon induced pseudoscalar form factor in lattice QCD

arXiv

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arXiv 2025年

作者： Sasaki, Shoichi Aoki, Yasumichi Ishikawa, Ken-Ichi Kuramashi, Yoshinobu Sato, Kohei Shintan, Eigo Tsuji, Ryutaro Watanabe, Hiromasa Yamazaki, Takeshi Department of Physics Tohoku University Sendai980-8578 Japan RIKEN Center for Computational Science Kobe650-0047 Japan Core of Research for the Energetic Universe Graduate School of Advanced Science and Engineering Hiroshima University Higashi-Hiroshima739-8526 Japan Center for Computational Sciences University of Tsukuba Tsukuba305-8577 Japan Degree Programs in Pure and Applied Sciences Graduate School of Science and Technology University of Tsukuba Ibaraki305-8571 Japan Tsukuba305-0801 Japan Yukawa Institute for Theoretical Physics Kyoto University Kyoto606-8502 Japan Institute of pure and Applied Sciences University of Tsukuba Tsukuba305-8571 Japan

In the PACS10 project, the PACS collaboration has generated three sets of the PACS10 gauge configurations at the physical point with lattice volume larger than (10 fm)4 and three different lattice spacings. The isovector nucleon form factors had been already calculated by using two sets of the PACS10 gauge configurations. In our strategy, the smearing parameters of the nucleon interpolation operator were highly optimized to eliminate as much as possible the contribution of excited states in the nucleon two-point function. This strategy was quite successful in calculations of the electric (GE), magnetic (GM) and axial-vector (FA) form factors, while the induced pseudoscalar (FP) and pseudoscalar (GP) form factors remained strongly affected by residual contamination of πΝ-state contribution. In this work, we propose a simple method to remove the πΝ-state contamination from the FP form factor, and then evaluate the induced pseudoscalar charge g∗Ρ and the pion-nucleon coupling gπNN from existing data in a new analysis. Applying this method to the GP form factor is also considered with a help of the axial Ward-Takahashi identity. © 2025, CC BY.

关键词： Lattice theory

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Studies of nucleon isovector structure with the PACS10 superfine lattice

arXiv

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arXiv 2024年

作者： Tsuji, Ryutaro Aoki, Yasumichi Ishikawa, Ken-Ichi Kuramashi, Yoshinobu Sasaki, Shoichi Sato, Kohei Shintani, Eigo Watanabe, Hiromasa Yamazaki, Takeshi Tsukuba305-0801 Japan RIKEN Center for Computational Science Kobe650-0047 Japan Core of Research for the Energetic Universe Graduate School of Advanced Science and Engineering Hiroshima University Higashi-Hiroshima739-8526 Japan Center for Computational Sciences University of Tsukuba Tsukuba305-8577 Japan Department of Physics Tohoku University Sendai980-8578 Japan Degree Programs in Pure and Applied Sciences Graduate School of Science and Technology University of Tsukuba Ibaraki305-8571 Japan Yukawa Institute for Theoretical Physics Kyoto University Kyoto606-8502 Japan Institute of pure and Applied Sciences University of Tsukuba Tsukuba305-8571 Japan

We present the results for the nucleon axial-vector, induced pseudoscalar and pion-nucleon couplings obtained from 2+1 flavor lattice QCD at the physical point with a large spatial extent of about 10 fm. Our calculations are performed with the PACS10 gauge configurations generated by the PACS Collaboration with the six stout-smeared O(a) improved Wilson-clover quark action and Iwasaki gauge action at β = 1.82, 2.00 and 2.20 corresponding to lattice spacings of 0.09 fm (coarse), 0.06 fm (fine) and 0.04 fm (superfine), respectively. We first evaluate the value of the nucleon axial-vector coupling. In addition, the induced pseudoscalar and pion-nucleon couplings from the induced pseudoscalar form factor are also investigated. Combining the results obtained from the all of our coarse, fine and superfine lattices, we finally discuss the systematic uncertainties in our calculation based on the comparison with both of the experimental values and lattice QCD results provided by the other collaborations. Copyright © 2024, The Authors. All rights reserved.

关键词： Gages

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Functional production of human antibody by the filamentous fungus Aspergillus oryzae

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Fungal Biology and Biotechnology 2020年第1期7卷 7页

作者： Huynh, Hung Hiep Morita, Naoki Sakamoto, Toshihiro Katayama, Takuya Miyakawa, Takuya Tanokura, Masaru Chiba, Yasunori Shinkura, Reiko Maruyama, Jun-Ichi Department of Biotechnology University of Tokyo Tokyo Japan Laboratory of Immunology and Infection Control Institute for Quantitative Biosciences University of Tokyo Tokyo Japan Collaborative Research Institute for Innovative Microbiology University of Tokyo Tokyo Japan Department of Applied Biological Chemistry University of Tokyo Tokyo Japan Biotechnology Research Institute for Drug Discovery National Institute of Advanced Industrial Science and Technology (AIST) Tsukuba Ibaraki Japan Core Research for Evolutional Science and Technology Japan Agency for Medical Research and Development Tokyo Japan

Background: Monoclonal antibodies (mAbs) as biopharmaceuticals take a pivotal role in the current therapeutic applications. Generally mammalian cell lines, such as those derived from Chinese hamster ovaries (CHO), are used to produce the recombinant antibody. However, there are still concerns about the high cost and the risk of pathogenic contamination when using mammalian cells. Aspergillus oryzae, a filamentous fungus recognized as a GRAS (Generally Regarded As Safe) organism, has an ability to secrete a large amount of proteins into the culture supernatant, and thus the fungus has been used as one of the cost-effective microbial hosts for heterologous protein production. Pursuing this strategy the human anti-TNFα antibody adalimumab, one of the world's best-selling antibodies for the treatment of immune-mediated inflammatory diseases including rheumatoid arthritis, was chosen to produce the full length of mAbs by A. oryzae. Generally, N-glycosylation of the antibody affects immune effector functions such as antibody-dependent cell-mediated cytotoxicity (ADCC) via binding to the Fc receptor (FcγR) on immune cells. The CRISPR/Cas9 system was used to first delete the Aooch1 gene encoding a key enzyme for the hyper-mannosylation process in fungi to investigate the binding ability of antibody with FcγRIIIa. Results: Adalimumab was expressed in A. oryzae by the fusion protein system with α-amylase AmyB. The full-length adalimumab consisting of two heavy and two light chains was successfully produced in the culture supernatants. Among the producing strains, the highest amount of antibody was obtained from the ten-protease deletion strain (39.7 mg/L). Two-step purifications by Protein A and size-exclusion chromatography were applied to obtain the high purity sample for further analysis. The antigen-binding and TNFα neutralizing activities of the adalimumab produced by A. oryzae were comparable with those of a commercial product Humira^®. No apparent binding wit

关键词： Antibody Aspergillus oryzae Fc receptor N-linked glycan Neutralization

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Unravelling 3D Dynamics and Hydrodynamics during Incorporation of Dielectric Particles to an Optical Trapping Site

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ACS Nano 2023年第4期17卷 3797-3808页

作者： Louis, Boris Huang, Chih-Hao Camacho, Rafael Scheblykin, Ivan G. Sugiyama, Teruki Kudo, Tetsuhiro Melendez, Marc Delgado-Buscalioni, Rafael Masuhara, Hiroshi Hofkens, Johan Bresoli-Obach, Roger Molecular Imaging and Photonics Department of Chemistry KU Leuven Celestijnenlaan 200F Leuven3001 Belgium Department of Applied Chemistry National Yang Ming Chiao Tung University 1001 Ta Hsueh Road Hsinchu300093 Taiwan Center for Cellular Imaging Core Facilities the Sahlgrenska Academy University of Gothenburg Medicinaregatan 5A-7A Gothenburg40530 Sweden Division of Chemical Physics and NanoLund Lund University Kemicentrum Naturvetarvägen 16 Lund22100 Sweden Division of Materials Science Nara Institute of Science and Technology 8916-5 Takayamacho Nara Ikoma630-0101 Japan Universidad Autónoma de Madrid Campus de Cantoblanco Madrid28049 Spain Center for Emergent Functional Matter Science National Yang Ming Chiao Tung University 1001 Ta Hsueh Road Hsinchu300093 Taiwan Max Planck Institute for Polymer Research Ackermannweg 10 Mainz55128 Germany AppLightChem Institut Químic de Sarrià Universitat Ramon Llull Via Augusta 390 Catalunya Barcelona8017 Spain

Mapping of the spatial and temporal motion of particles inside an optical field is critical for understanding and further improvement of the 3D spatio-temporal control over their optical trapping dynamics. However, it is not trivial to capture the 3D motion, and most imaging systems only capture a 2D projection of the 3D motion, in which the information about the axial movement is not directly available. In this work, we resolve the 3D incorporation trajectories of 200 nm fluorescent polystyrene particles in an optical trapping site under different optical experimental conditions using a recently developed widefield multiplane microscope (imaging volume of 50 × 50 × 4 μm3). The particles are gathered at the focus following some preferential 3D channels that show a shallow cone distribution. We demonstrate that the radial and the axial flow speed components depend on the axial distance from the focus, which is directly related to the scattering/gradient optical forces. While particle velocities and trajectories are mainly determined by the trapping laser profile, they cannot be completely explained without considering collective effects resulting from hydrodynamic forces. © 2023 American Chemical Society.

关键词： Hydrodynamics

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