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Nanostructure Optics Lab
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A lab that investigates light in nanostructures with electron microscopes and pioneers new optical measurement methods.
AboutAbout the lab
Creation that only electron microscopy makes possible
The Nanostructure Optics Lab (Saito Lab) uses electron microscopes to study the states of light and electrons inside nanostructures.
It focuses on techniques such as electron energy-loss spectroscopy (EELS) and cathodoluminescence (CL), and also incorporates information-science methods such as machine learning.
The lab also works on confining light in nanoscale spaces and on writing nanoscale light sources with electron beams.
It started in 2025 as a relatively new lab within the Institute for Materials Chemistry and Engineering.
Key terms
- Electron energy-loss spectroscopy
- A spectroscopic method that measures the energy lost by electrons passing through a specimen. It corresponds to absorption spectroscopy
- Cathodoluminescence
- A method that analyzes the light emitted by a material hit by an electron beam. It is used in combination with an electron microscope
- In situ observation
- A method of observing in real time how the microstructure and function of a material change when heat or an electromagnetic field is applied to it
NewsLab news
View More ↗ResearchResearch themes
The lab explores new optical properties hidden in nanostructures and materials by combining electron microscopy with spectroscopy. It also develops electron microscopy methods themselves and works on generating nanoscale light sources with electron beams.
*Illustrative imageExploring New Light Hidden in Nanostructures
Using electron energy-loss spectroscopy and cathodoluminescence, the lab searches for new surface plasmon modes in nanostructures and analyzes the interaction between nanoscale light sources and nanocavities. It aims to use artificial crystals, made by arranging nanostructures periodically, to control how light propagates.
*Illustrative imageFaster Electron Microscopy Observation and Measurement
The lab devised a deep-learning technique to restore scanning transmission electron microscopy (STEM) images degraded by high-speed scanning, cutting the data acquisition time for 3D observation (tomography) from the conventional tens of minutes to 5 seconds. It has also achieved in situ observation and 4D measurement of powder sintering.
*Illustrative imagePlacing Perovskite Nanoscale Light Sources with Electron Beams
The lab found a lead toward using electron beam irradiation to generate perovskite nanoscale light sources, which have excellent photoelectric conversion performance, at targeted positions with nanometer accuracy. It aims to develop technology for arranging single-photon sources and to extend it to quantum devices.
MembersFaculty
Members of the Nanostructure Optics Lab consist of faculty members, academic researchers, technical staff, administrative assistants, and doctoral and master's students.As of 2026
- Associate ProfessorHikaru Saito
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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: “Electron microscope-CNAM 43819” Antoaneta from Paris, France / CC BY 2.0 (cropped)
- Exploring New Light Hidden in Nanostructures: “Ferry light trail, Rostock” Radomianin / CC BY-SA 4.0 (cropped)
- Faster Electron Microscopy Observation and Measurement: “Scanning electron microscope - UFCH JH (2020) 01” Tadeáš Bednarz / CC BY-SA 4.0 (cropped)
- Placing Perovskite Nanoscale Light Sources with Electron Beams: “Electron Beam Freeform Fabrication 2” NASA / Public domain (cropped)
- Related lab (Nanomaterials Characterization Lab): “U.S. Department of Energy - Science - )” U.S. Department of Energy from United States / Public domain (cropped)
- Related lab (Hetero-Fusion Materials Lab): “70 Light-emitting-diode-(LED)” www.LEDlighting5.com / CC BY-SA 3.0 (cropped)
- Related lab (Nano-Organization Lab): “Blue Phase Core-Shell Liquid Crystals” Aecohen64 / CC BY 4.0 (cropped)
- Related lab (Nano-Fusion Materials Lab): “Such different zinc oxide - nanorods” Andrey P. Tarasov / CC BY 4.0 (cropped)
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