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Other departments in Faculty of Engineering Science ›Faculties at Yokohama National University ›

Fenglei Hong, Professor
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The Hong-Akamatsu-Asakawa Lab specializes in quantum electronics and focuses its research on ultra-precise laser spectroscopy. The lab conducts research and education on optical frequency combs, laser cooling, optical (atomic) clocks, atoms and molecules, quantum standards, and microparticle trapping. The lab's website explains that optical frequency combs are used in the search for exoplanets, and that optical clocks are used in the search for dark matter and in tests of whether physical constants remain unchanged.

Hideo Kosaka, Professor
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The Kosaka-Sekiguchi Lab conducts research toward quantum repeaters, quantum computers, and a quantum internet that connects them through quantum communication. When impurities such as nitrogen are added to diamond and the diamond is heat-treated, color centers called nitrogen-vacancy (NV) centers form, and they function as memory that stores quantum states. The lab has succeeded in a proof-of-principle demonstration of a quantum repeater based on quantum teleportation using diamond, and continues its research toward a quantum internet. The lab's website presents it under the name "Kosaka Lab."

Tomoyuki Horikiri, Professor
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The Horikiri-Ozawa Lab studies quantum technologies that use light and matter. Drawing on quantum information science, which emerged from the fusion of quantum mechanics and information theory, the lab mainly studies long-distance quantum communication technologies aimed at quantum cryptographic communication and cloud quantum computing. Associate Professor Ozawa specializes in precision spectroscopy experiments on atoms and molecules using lasers, and also develops frequency comb light sources and ion traps. The lab's website presents it under the name "Quantum Optics Research Group."

Ikufumi Katayama, Professor
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The Katayama-Tahara Lab develops new spectroscopy methods using ultrashort pulse lasers and uses them to study the physical properties of novel materials. The Katayama lab develops methods to detect terahertz-range information with a single laser pulse, as well as techniques to visualize ultrafast phenomena that occur at the nanoscale. The group's base at Yokohama National University (YNU), the Terahertz and Nano-Optical Science Research Center, aims to advance technology development in terahertz science and nanoscience and to promote collaboration with researchers inside and outside the university. The center focuses on visualizing invisible phenomena with its own methods, such as single-shot spectroscopy and nano-optical techniques.

Jo Sato, Professor
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The Sato-Hiroshima Lab mainly studies particle physics and astrophysics. The lab also participates in several international collaborative experiments, approaching the fundamental laws of nature from both theory and experiment. It covers a wide range of topics, including the COMET experiment searching for muon-to-electron conversion, neutrino oscillations, grand unified theories, and dark matter. On the lab's website, it is introduced under the name "Elementary Particle and Astrophysics Lab (Sato-Hiroshima Lab)."

Yusaku Katayose, Professor
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The Katayose Lab observes cosmic rays and cosmic gamma rays to study phenomena occurring in outer space and in celestial objects. For observation, the lab uses a phenomenon called an "air shower," which cosmic rays create in the atmosphere. The lab also develops radiation detectors and electronics for measuring cosmic rays, and conducts research through simulation. On the lab's website, it is introduced under the name "Cosmic Ray Physics Lab."

Akihiro Minamino, Professor
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The Minamino-Bronner Lab explores the fundamental laws that govern the universe through astroparticle physics experiments centered on neutrino research. The research page lists four experiments: Hyper-Kamiokande, T2K, Super-Kamiokande, and J-PARC E71 (NINJA). The T2K experiment aims to discover violation of neutrino and antineutrino (CP) symmetry, and the Super-Kamiokande experiment aims to observe supernova relic neutrinos. The lab is recruiting master's and doctoral students.

Kan Akatsu, Professor
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The M&E Energy Conversion Lab (Akatsu Lab) studies how to make motors and generators more efficient and higher-performing, focusing on design, analysis, fabrication, and control. The goal of the whole lab is to "contribute from an engineering standpoint toward zero greenhouse gas emissions by 2050." The lab was established at the Shibaura Institute of Technology in FY2009 and moved to Yokohama National University in FY2019. The lab holds study sessions on motor fundamentals, power electronics, and control, in which senior students teach junior students, as well as seminars where students present the progress of their research.

Taro Arakawa, Professor
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The Arakawa Lab studies semiconductor-based devices such as optical modulators, optical switches, and semiconductor lasers, as well as photonic integrated circuits. The lab also works on optical biosensors and gas sensors, and related technologies. Its other main area is advanced plating technology for making electronic and optical devices, and its applications. The lab collaborates with other labs at Yokohama National University and with a group at the Materials and Surface Engineering Research Institute of Kanto Gakuin University.

Naoki Ishikawa, Associate Professor
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Ishikawa Lab conducts research on wireless communications and quantum computing. Its main areas are high-speed mobile communications and applications of quantum computing to communications. The lab studies quantum optimization for wireless communications, post-quantum physical layer security, and communication schemes that deliver high performance with low computational complexity. Faculty members have backgrounds in both communications engineering and information engineering, so research themes can be set relatively flexibly.
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