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Akiyama Lab
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The lab explores the properties of light through spectroscopy, from lasers and solar cells to firefly bioluminescence.
AboutAbout the lab
Uncovering how light works through precise spectroscopy
The Akiyama Lab studies the properties of materials related to light, including semiconductor lasers, solar cells, quantum nanostructures, and firefly bioluminescence.
Using laser spectroscopy, microspectroscopy, optical measurement, semiconductor device fabrication, and crystal growth techniques, the lab approaches these topics from the standpoint of fundamental physics and science.
Developing optical experiment techniques is also one of the lab's strengths, including techniques for detecting weak light with high sensitivity and for accurately measuring the amount of light.
For topics such as firefly bioluminescence, the lab works jointly with experts in biology, chemistry, and theory, as well as with private companies.
Key terms
- Spectroscopy
- A method of studying the properties and state of a substance by separating light by wavelength (color) and measuring the intensity of each
- Quantum nanostructures
- Semiconductor structures fabricated at the scale of nanometers, whose quantum mechanical properties change depending on their size and shape
- Raman spectroscopy
- A method of studying the structure and vibrations of molecules by using the phenomenon in which light shone on a substance is scattered with a slight change in color
NewsLab news
View More ↗ResearchResearch themes
The lab studies the optical properties of semiconductor quantum nanostructures, the device physics of semiconductor lasers and solar cells, and the bioluminescence of fireflies, among other topics. It uses laser spectroscopy, microspectroscopy, optical measurement, and techniques for semiconductor crystal growth and microfabrication.
*Illustrative imageSemiconductor Lasers and Nanostructures
To understand and control, using light, the quantum mechanical properties that change with size and shape, the lab develops spectroscopic methods for semiconductor quantum nanostructures. Its work includes developing laser spectroscopy techniques for tiny spaces, fundamental spectroscopy of samples, and designing structures based on the results and making samples through thin-film growth.
*Illustrative imagePhysics of Solar Cells
Aiming for higher efficiency, the lab clarifies the operating characteristics of solar cells from a physics perspective. It has developed a method to diagnose the performance of each layer of multi-junction solar cells through quantitative luminescence measurements, and it also investigates how radiation degrades performance.
*Illustrative imageMysteries of Bioluminescence
Targeting fireflies, crystal jellyfish, and sea fireflies, the lab uses the precise spectroscopic methods cultivated in physics to investigate how the excited states of light-emitting molecules are formed and why they can emit light with such high efficiency.
*Illustrative imageStructural Changes in Proteins
Using Raman spectroscopy, the lab precisely measures how protein structures change in solutions near body temperature. By developing a measurement system that yields high-quality spectra from small samples in a short time, it works to elucidate how proteins function.
MembersFaculty
- ProfessorHidefumi Akiyama
- Assistant ProfessorMasataka Kobayashi
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: “Diode laser” 作者不詳 / Public domain (cropped)
- Semiconductor Lasers and Nanostructures: “Laser diode with case cut away” Arconsoli / CC BY-SA 4.0 (cropped)
- Physics of Solar Cells: “S135E011289 - STS-135 - Flyaround View of Solar Array Wing - DPLA - c62916b94b1c198f5e20d1df8223ced0” National Aeronautics and Space Administration. Lyndon B. Johnson Space Center. 2/17/1973 / Public domain (cropped)
- Mysteries of Bioluminescence: “Photinus pyralis Firefly glowing” art farmer from evansville indiana, usa / CC BY-SA 2.0 (cropped)
- Structural Changes in Proteins: “C17orf58 protein (UPF0450) structure with AlphaFold” Luyu9927 / CC BY 4.0 (cropped)
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