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Makimoto Lab
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Stacking atoms one layer at a time to build the semiconductors that will support the information society of the future.
AboutAbout the lab
Stacking atoms, one layer at a time
The Makimoto Lab researches semiconductor devices and materials using cutting-edge techniques such as MBE (molecular beam epitaxy).
Semiconductor engineering is a core field of electronics, built on semiconductor physics, material properties, and semiconductor nanotechnology.
From an interdisciplinary perspective, the lab aims to create technologies that will support the information society of the future.
The lab is divided into a GaAs (gallium arsenide) team and a new materials team, each carrying out its own research.
Key terms
- Molecular beam epitaxy
- A method of growing thin films by evaporating source materials in a vacuum and arranging atoms layer by layer on top of a crystal. Also called MBE.
- Exciton
- A state in a semiconductor that has absorbed light, in which an electron and a hole attract each other and form a pair.
- Band gap
- The range of energy that electrons in a semiconductor cannot take. The larger this gap, the better the material can withstand high voltages.
NewsLab news
View More ↗ResearchResearch themes
The lab studies semiconductor devices and materials using cutting-edge techniques such as MBE (molecular beam epitaxy). By growing thin films and clarifying their electrical and optical properties, the lab aims to apply them to solar cells, thermistors, and devices for power electronics.
*Illustrative imageGaAsN-based high-efficiency solar cells
Using molecular beam epitaxy, the lab grows GaAsN thin films and GaAsN-based structures and investigates their electrical and optical properties. Evaluating the films with a particular focus on excitons, the lab takes on the challenge of growing film structures in which excitons exist stably, in order to promote light absorption and raise solar cell efficiency.
*Illustrative imageTiAlN thermistors
Ordinary semiconductor devices such as transistors and LEDs are required to have properties that do not change with the ambient temperature. For thermistor applications, the opposite is needed: properties that change greatly with temperature. The lab therefore aims to fabricate thin films whose resistance changes greatly with temperature.
*Illustrative imageGallium oxide
Gallium oxide, which has a large band gap energy, is attracting attention for use in semiconductor devices for power electronics. By using sputtering, which can grow films over large areas at low cost, the lab aims to grow gallium oxide with low resistance.
MembersFaculty
The members of the Makimoto Lab consist of faculty and master's and undergraduate students.As of 2026
- ProfessorToshiki Makimoto
VoicesStudent voices
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Wakao LabSchool of Advanced Science and Engineering, Department of Electrical Engineering and BioscienceComputer-aided electromagneticsThe information on this page is compiled by the LabLog team from the lab's public information and interviews. For corrections or removal requests, please contact LabLog, not the lab.
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: “Molecular Beam Epitaxy System” SJMW1987 / CC BY 4.0 (cropped)
- GaAsN-based high-efficiency solar cells: “Close-up of a polycrystalline solar PV panel” Guilhem Vellut / CC BY 2.0 (cropped)
- TiAlN thermistors: “Thermochromic thermometer” Georg Pik / CC0 (cropped)
- Gallium oxide: “LAGP sputtering target” Andrea Macrelli / CC BY-SA 4.0 (cropped)
- Related lab (Nishinaga Lab): “Gallium Arsenide (GaAs) 2" wafer” La2O3 / CC BY-SA 3.0 (cropped)
- Related lab (Sota Lab): “Dispersive Prism Illustration by Spigget” Spigget / CC BY-SA 3.0 (cropped)
- Related lab (Watanabe Lab): “Fliehkraftregler” Mirko Junge / CC BY-SA 3.0 (cropped)
- Related lab (Wakao Lab): “Detailed view of a cutaway electric motor showing inner components” Shixart1985 / CC BY 2.0 (cropped)
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