Labs in Yokohama National University, Faculty of Engineering Science

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The lab investigates the behavior of electrons on solid surfaces through both measurement and calculation.

Shuto Lab studies phenomena that occur on solid surfaces through both experiments and theoretical calculations. A solid surface is a special two-dimensional space where molecules and atoms interact with the solid, and it requires a different treatment from the interior of the solid. Taking advantage of this environment, the lab aims to clarify the formation and control of nanoscale structures, as well as changes in electronic states upon excitation and the dynamic processes involved. The lab also works on phenomena that form the foundation of next-generation devices and on the development of new materials.

#Surface physics #Photoelectron spectroscopy #Scanning tunneling microscopy

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A solid-state physics lab focused on how the properties of materials change when exposed to light.

Sekiya Lab makes materials with distinctive structures on its own and measures their optical, electrical, and magnetic properties. The lab also focuses on how properties change when light is applied, hoping that distinctive physical properties will emerge. Research subjects include single crystals of titanium dioxide, thin films of oxynitrides that are attracting attention as fuel cell catalysts, and light-responsive molecules and dye aggregates. The lab is said to be open to visits and tours at any time, and visitors are advised to make an appointment whenever possible.

#Titanium dioxide #Photoinduced magnetization #Photochromism

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白崎研究室 (introduction coming soon)

Condensed matter theory. Keywords: condensed matter physics I, mathematical physics and fundamental condensed matter physics.

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A lab that predicts the properties of solids and molecules with quantum mechanics, without separating the two.

The Raebiger Lab studies the properties of solids and molecules using theories from quantum chemistry and condensed matter physics. The lab regards the distinction between solids and molecules as artificial, and holds that the properties of any material can be predicted by solving the same Schrödinger equation. Many of its research themes deal with how 3d transition metal atoms behave in the various environments found in solids and molecules. The lab's website is in English only, and presents the lab under the name SSMT (Solid State and Molecular Theory).

#Quantum chemistry #Condensed matter theory #3d transition metals

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A lab that explores material properties such as superconductivity using first-principles calculations.

The Kawamura Lab uses first-principles calculations to study material properties such as superconductivity, phonons, and surfaces and interfaces. In superconductivity, the lab works on predicting by calculation the transition temperature at which a material becomes superconducting, and on investigating the superconducting gap. The lab also develops computational programs and conducts research using data science and machine learning. The lab was founded in April 2025 and belongs to the Physical Engineering Education field.

#Superconductivity #First-principles calculations #Phonons

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A lab that uses theory to explore uncharted phenomena arising from the interaction between light and matter.

The Bamba Lab uses the methods of theoretical physics to discover and explain previously unknown phenomena that arise from the interaction between light and matter. Its research centers on a phenomenon called the “superradiant phase transition,” which occurs through light–matter interaction. The lab states that research on light is thriving in industry and applications, but few theoretical researchers pursue the underlying principles of the phenomena. The lab's December 2023 guide for lab assignment also lists the analysis of joint experiments with experimental groups in the United States and elsewhere as an example of a research theme.

#Superradiant phase transition #Ultrastrong light-matter coupling #Theoretical physics

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The lab studies optical frequency combs and optical clocks, using lasers to measure the frequency of light with extreme precision.

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.

#Optical frequency combs #Ultra-precision spectroscopy #Laser cooling

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The lab uses diamond to connect quantum computers with quantum communication.

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."

#Quantum repeaters #Diamond NV centers #Quantum interfaces

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The lab studies quantum technologies such as quantum communication using light and matter.

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."

#Quantum information #Quantum communication #Quantum computers

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The lab develops new spectroscopy methods using ultrashort pulse lasers and explores the physical properties of materials.

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.

#Terahertz spectroscopy #Ultrashort pulse lasers #Nano-optics