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Hatano-Iwasaki Lab
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The lab builds ultra-sensitive sensors and quantum light sources using the quantum properties of diamond.
AboutAbout the lab
Turning dreams into reality with science and technology!
The Hatano-Iwasaki Lab studies "diamond electronics" using diamond.
The lab builds quantum sensors that measure magnetic fields with extreme sensitivity by exploiting the quantum properties of tiny defects inside diamond.
The lab also studies quantum light sources and quantum memories for quantum networks.
The lab covers everything from materials and physical properties to devices and systems in one integrated effort, aiming to create new value by merging different fields.
Key terms
- Quantum sensor
- A sensor that uses quantum properties, such as the spin of electrons, to measure magnetic fields, temperature, and more with extreme sensitivity
- NV center
- A site in diamond where a carbon atom is replaced by nitrogen and the adjacent site is vacant. The way it emits light changes depending on factors such as the magnetic field
- Quantum network
- A secure information network that exchanges quantum states using quantum entanglement and cannot be eavesdropped on
NewsLab news
A paper by a doctoral student was published in Applied Physics Letters
A student received the 2025 Outstanding Bachelor's Student Award from the Department of Electrical and Electronic Engineering
A paper by a doctoral student was published in Nano Letters
A paper was published in Advanced Functional Materials
A paper by a student was published in Advanced Quantum Technologies
ResearchResearch themes
The lab studies diamond sensors (ultra-sensitive quantum magnetic sensors), which exploit the quantum-mechanical properties of electron spins in diamond, as well as diamond quantum light sources for quantum networks. The lab can also synthesize diamond by chemical vapor deposition (CVD).
*Illustrative imageUltra-sensitive quantum magnetic sensors
Drawing on its technique for fabricating NV centers at high density and aligned in a single orientation, the lab aims to realize magnetic sensors that reach the sensitivity needed for medical applications at room temperature.
*Illustrative imageSensors for measuring the body's magnetic fields
The lab is working to establish a method for measuring the magnetic fields produced by brain activity (magnetoencephalography) with diamond quantum sensors. So far, it has succeeded in measuring the magnetic field of the heart, which is larger than that of the brain.
*Illustrative imageMonitoring electric vehicle batteries
This research mounts diamond quantum sensors on vehicles to monitor how much of an electric vehicle's battery is being used with high accuracy. The lab is working on miniaturizing the sensor system and improving its sensitivity in the in-vehicle environment.
*Illustrative imageMeasuring weight by converting it into a magnetic field
This research combines condensed matter physics with measurement using NV centers. By combining NV centers with magnetostrictive materials, which convert weight into a magnetic field, the lab aims to image extremely small masses such as those of cells.
MembersFaculty
The members of the Hatano-Iwasaki Lab consist of faculty, doctoral, master's, and undergraduate students, researchers, and a secretary.As of 2026
- Specially Appointed ProfessorMutsuko HatanoPublications ↗
- ProfessorTakayuki IwasakiPublications ↗
- Assistant ProfessorNaota SekiguchiPublications ↗
- Project ProfessorTadashi Sakai
- Project Associate ProfessorShunsuke Daimon
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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: “Diamond (AK1 Pipe, Argyle Lamproite, Precambrian; Argyle Mine, Western Australia) ( )” James St. John / CC BY 2.0 (cropped)
- Ultra-sensitive quantum magnetic sensors: “StructureNVcenter” Nepomo / Public domain (cropped)
- Sensors for measuring the body's magnetic fields: “MEG UCHSC” Katie Youngpeter. / CC BY-SA 3.0 (cropped)
- Monitoring electric vehicle batteries: “SOR bus EBN 11. Traction batteries. Spielvogel 2014” Spielvogel / CC0 (cropped)
- Measuring weight by converting it into a magnetic field: “MEG UCHSC” Katie Youngpeter. / CC BY-SA 3.0 (cropped)
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