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Shimizu Lab
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A lab that controls light one particle (photon) at a time, aiming at applications in quantum measurement and quantum communication.
AboutAbout the lab
Manipulating photons one by one to probe the nature of light.
The Shimizu Lab does experimental research on generating and controlling light as individual particles (photons).
In the regime of extremely weak light, where the quantum nature of light appears prominently, the lab develops techniques for generating, controlling, and detecting photons.
Using quantum connections between photons, the lab aims to reveal unknown properties of light and to apply them to quantum measurement and sensing and to optical quantum information and communication.
Research on optical quantum information and communication is carried out jointly with the National Institute of Information and Communications Technology (NICT).
Key terms
- Photon
- One unit of light when light is counted as particles. The quantum nature of light appears prominently in very weak light.
- Entangled photons
- Photons that have quantum correlations (quantum entanglement) with each other. The correlations can be created in polarization or frequency.
- Spectroscopic measurement
- Measurement that separates light by frequency (color) for analysis. It provides clues to how matter and light interact.
NewsLab news
A doctoral student's research on ultrafast detection of entangled light was published in the Japanese Journal of Applied Physics
A proposal for time-resolved spectroscopy using entangled photons was published in Science Advances
Research observing entangled light from a semiconductor with a single-photon camera was published in Optics Express
A master's student won the OSJ/Optica Student Award at OPJ2024
A master's student won the Poster Presentation Award for Young Researchers at QUANTUM INNOVATION2024
ResearchResearch themes
By controlling and generating light as individual particles (photons), the Shimizu Lab aims to clarify unknown properties of light and to apply them to quantum measurement and sensing technologies and to optical quantum information and communication technologies. In its experiments, the lab develops techniques for generating, controlling, and detecting photons in the regime of extremely weak light, where the quantum nature of light appears prominently.
*Illustrative imageClarifying unknown properties of light and quantum measurement
The lab is establishing spectroscopic measurement methods that use "frequency-entangled photons," in which photons have quantum correlations in frequency. It hopes to reveal new ways in which light interacts with matter that could not be observed with conventional measurements.
*Illustrative imageApplications to optical quantum information and communication technologies
The lab conducts research related to "optical quantum information and communication technologies" jointly with the National Institute of Information and Communications Technology (NICT). Between the University of Electro-Communications and NICT, it also carries out free-space optical communication experiments aimed at realizing a quantum network.
MembersFaculty
The members of the Shimizu Lab are faculty, JSPS Research Fellows, project researchers, collaborative researchers, administrative assistants, and doctoral, master's, and undergraduate students.As of 2026
- ProfessorRyosuke Shimizu
VoicesStudent voices
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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: “Entangled Photon Generation for Liquid Crystal Qubits Image” Alexander202511 / CC BY-SA 4.0 (cropped)
- Clarifying unknown properties of light and quantum measurement: “Quantum circuit that exhibits Parity Measurement” Vtomole / CC BY-SA 4.0 (cropped)
- Applications to optical quantum information and communication technologies: “High-Speed Quantum Key System Wins Research Award ( )” National Institute of Standards and Technology / Public domain (cropped)
- Related lab (Haruka Tanji Lab): “Optical cavities” No machine-readable author provided. Fffred~commonswiki assumed (based on copyright claims). / Public domain (cropped)
- Related lab (Miyamoto Lab): “Evanescent wave dynamic light scattering setup side view” Antje Larsen, Benoit Loppinet, Antonio Giuliani / CC BY-SA 4.0 (cropped)
- Related lab (Zhang Lab): “ALE4077” Alessiocoser / CC BY 4.0 (cropped)
- Related lab (Nakagawa Lab): “Atom interferometer” European Space Agency / CC BY-SA 2.0 (cropped)
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