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Meta-Photonic Quantum Condensed Matter Lab
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An optical condensed matter lab that uses light to probe and control the order and functions of matter.
AboutAbout the lab
Using light to explore the order and functions of matter
The Meta-Photonic Quantum Condensed Matter Lab uses light to investigate the properties of matter and, further, studies how to control the functions of matter with light.
Light interacts with electrons and ions in matter and causes reflection, absorption, and emission, so studying these processes yields information about the inside of the matter.
The targets are diverse functional materials, including magnetic metamaterials with artificially designed optical responses, multiferroic materials, strongly correlated materials, and topological materials.
On the lab's website, it is introduced under the name "Matsubara Lab."
Key terms
- Spin
- A property of electrons, separate from their charge, that makes them behave like tiny magnets
- Metamaterial
- An artificial material with structures smaller than the wavelength of light, enabling optical responses that are impossible with natural materials
- Multiferroic material
- A multifunctional material that combines multiple properties, such as ferroelectricity and ferromagnetism
- Multipole
- A concept for understanding electric order, magnetic order, chirality, and more in a unified way from the viewpoint of symmetry
NewsLab news
A master's student won the Best Poster Award at the plenary meeting of the Transformative Research Areas program
A master's student won the Excellent Poster Award at the plenary meeting of the Transformative Research Areas program
A student won the Physics Department Award (Master's) from the Department of Physics, Tohoku University
A master's student won the Best Poster Award at the results briefing meeting of the Transformative Research Areas program
A student won the Student Excellent Presentation Award at the 80th Annual Meeting of the Physical Society of Japan
ResearchResearch themes
The Meta-Photonic Quantum Condensed Matter Lab combines optical science, quantum condensed matter science, and artificial-materials science, and aims to detect, visualize, and control the diverse orders, symmetries, and functions hidden in matter. Using linear and nonlinear interactions between light and matter, it works to create new opto-spintronic and quantum functions.
*Illustrative imageOpto-Spintronics
This research generates and manipulates electron spins and spin currents not only with electric currents and magnetic fields but also with light. Using magnetic metamaterials, which combine magnetic materials with artificial structures, the lab explores the possibility of controlling the direction and magnitude of spin currents and photocurrents with light.
*Illustrative imageSeeing Hidden Order with Light
The lab detects and visualizes "hidden orders," such as antiferromagnetic order and multipolar order, that are almost invisible with ordinary microscopes, using nonlinear optical effects, magneto-optical effects, and its own optical imaging techniques.
*Illustrative imageEnergy Conversion among Light, Electricity, and Magnetism
The lab studies new energy conversion phenomena in which light, electricity, and magnetism are coupled in magnetic materials and magnetic metamaterials. In materials designed with broken symmetry, phenomena such as zero-bias photocurrent appear, in which a current is generated just by shining light, without an external voltage.
*Illustrative imageMaterials That Make Light Travel One Way
In materials where electric and magnetic orders coexist and both spatial-inversion symmetry and time-reversal symmetry are broken at the same time, nonreciprocal optical responses appear, in which absorption and refraction change depending on the direction the light travels. The lab studies this effect in multiferroic materials, magnetic materials, and metamaterials.
MembersFaculty
The members of the Meta-Photonic Quantum Condensed Matter Lab consist of faculty, Visiting Professors, doctoral, master's, and undergraduate students, and secretaries.As of 2026
- ProfessorMasakazu Matsubara
- Assistant ProfessorKazuaki Ishibashi
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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: “Laser LY-RGBW01 internals optical table shining PC301980” Alexey Vazhnov / CC BY-SA 4.0 (cropped)
- Opto-Spintronics: “CLARA Electromagnet, Daresbury Laboratory” Mystery Ray / CC0 (cropped)
- Seeing Hidden Order with Light: “Scientist measures the optical limiting performance of a nonlinear material - ALC” Adelphi Lab Center Douglas G. LaFon / CC BY 2.0 (cropped)
- Energy Conversion among Light, Electricity, and Magnetism: “Superconducting Metamaterial Waveguide Chip” OJB Quantum / CC BY 4.0 (cropped)
- Materials That Make Light Travel One Way: “Crystals of Beta-alanine and Coca-Cola mixture under polarized light” Janeklass / CC BY 4.0 (cropped)
- Related lab (分子エレクトロニクス): “ConductivePoly” Smokefoot / Public domain (cropped)
- Related lab (創発量子物質科学): “Apparatus for measuring vapor pressures - DPLA - 96907cd46db76b056b34c2cda439c64d” 作者不詳 / Public domain (cropped)
- Related lab (強相関系
理論): “Levitation meissner” Julien Bobroff (user:Jubobroff), Frederic Bouquet (user:Fbouquet), LPS, Orsay, France / CC BY-SA 3.0 (cropped) - Related lab (量子情報・量子光学): “Laser LY-RGBW01 internals optical table PC301966” Alexey Vazhnov / CC BY-SA 4.0 (cropped)
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