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Optical Solid-State Physics (O) Lab
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The lab uses lasers to observe electrons in solids and investigate mechanisms such as superconductivity.
AboutAbout the lab
Watching how electrons behave, with lasers.
The Optical Solid-State Physics Lab (O Lab) is a new lab launched in fiscal year 2024 that studies the behavior of electrons in solids.
The lab develops its own cutting-edge measurement instruments that take advantage of the properties of lasers, aiming to clarify the properties of various materials and open up new functions.
Using photoemission spectroscopy, the lab investigates the mechanisms of complex phenomena in strongly correlated materials and high-temperature superconductors from the viewpoint of electronic states, and it also examines how solids respond to light using an ultrafast time-resolved electron microscope.
Working with labs that specialize in materials synthesis and theoretical calculation, the lab carries out research with a focus on measurement.
Key terms
- Photoemission spectroscopy
- A method that shines light on a material and examines the electrons that are emitted, in order to learn the energy and motion of the electrons inside the material
- Electronic states
- A description of the energy and motion of the enormous number of electrons in a material as a collective
- Superconductivity
- A phenomenon in which electrical resistance drops to zero below a certain temperature. In the superconducting state, electrons feel an attractive force toward each other and form pairs
NewsLab news
A master's student won a Poster Award at the Solid State Chemistry Forum Workshop
Installation of an electron microscope at Nagoya University completed
Optical Solid-State Physics Lab (O Lab) established
ResearchResearch themes
The lab studies "electronic states," which are clues for understanding properties of materials such as electrical conductivity and magnetism, by photoemission spectroscopy with laser light sources. It also works on research that uses an apparatus combining an ultrashort-pulse laser with an electron microscope to examine the fast response of solids exposed to light.
*Illustrative imageMicro-Focused Laser Photoemission Spectroscopy
At Nagoya University, the lab will develop a focused laser photoemission spectroscopy system aiming for a spatial resolution below 1 µm. The goal is to elucidate, from the viewpoint of electronic states, phenomena specific to tiny regions, such as spatially inhomogeneous order and the unusual metallic phases at magnetic domain boundaries.
*Illustrative imageElectron Pairing in Unconventional Superconductors
In cuprate and iron-based high-temperature superconductors, it has been suggested that the spin and orbital degrees of freedom of electrons may be involved in forming electron pairs. The lab examines the symmetry of the superconducting gap in detail by photoemission spectroscopy to explore the origin of electron pairing.
*Illustrative imageNormal State of High-Temperature Superconductors
The lab investigates the "electronic nematic state," in which a collection of electrons spontaneously breaks the rotational symmetry of the crystal lattice, using photoemission spectroscopy and photoemission electron microscopy with different light sources such as lasers and synchrotron radiation, aiming to understand the mechanism of high-temperature superconductivity.
*Illustrative imageUltrafast Time-Resolved Electron Microscopy
Using an apparatus that combines an ultrashort-pulse laser with a transmission electron microscope, the lab studies, in both time and space, how the magnetism, crystal structure, and other properties of a solid exposed to light spread from fast local responses to slower phenomena. Construction of the apparatus at Nagoya University began in fiscal year 2025.
MembersFaculty
The members of the Optical Solid-State Physics Lab are faculty, master's and undergraduate students, and research assistants.As of 2026
- ProfessorTakahiro Shimojima
- Assistant ProfessorNatsuki Mitsuishi
- Project Assistant ProfessorZiqian Wang
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Cold atoms experiment 02” Tomasz Kawalec / CC BY-SA 4.0 (cropped)
- Micro-Focused Laser Photoemission Spectroscopy: “Sample holder in ultrahigh vacuum chamber for angle-resolved photoemission spectroscopy” Ponor / CC BY-SA 4.0 (cropped)
- Electron Pairing in Unconventional Superconductors: “Levitation of a magnet on a superconductor” Julien Bobroff (user:Jubobroff), Frederic Bouquet (user:Fbouquet), Jeffrey Quilliam, LPS, Orsay, France / CC BY-SA 3.0 (cropped)
- Normal State of High-Temperature Superconductors: “Cuprate cristallographic structure” Julien Bobroff (user:Jubobroff), LPS, Orsay, France / CC BY-SA 3.0 (cropped)
- Ultrafast Time-Resolved Electron Microscopy: “Transmission electron microscope (2)” Gannu03 / CC BY-SA 4.0 (cropped)
- Related lab (Nanomagnetism and Spin Physics (J) Lab): “Magnetic stripe domains” DMGualtieri / CC BY-SA 3.0 (cropped)
- Related lab (Condensed Matter Theory (Sc) Lab): “Suspension of a superconductor by a magnet” Julien Bobroff (user:Jubobroff), Frederic Bouquet (user:Fbouquet), Jeffrey Quilliam, LPS, Orsay, France / CC BY-SA 3.0 (cropped)
- Related lab (Photobioenergetics (G) Lab): “Standoff Laser Spectroscopy System ( )” Oak Ridge National Laboratory / CC BY 2.0 (cropped)
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