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Electronic Materials Lab
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The lab connects electron information and light information with semiconductor quantum dots.
AboutAbout the lab
Quantum dots opening a future that links electron and light information
The Electronic Materials Lab studies electronics technology, including nanoelectronic materials, to create new electronic and optical functions.
The lab seeks to understand how electrons and light behave in semiconductor nanoelectronic materials from the perspectives of both electronic engineering and condensed matter physics.
Based on this understanding, the lab makes energy-saving light-emitting diodes, lasers, and photodiodes, and explores new devices for optoelectronic information conversion.
The lab also works on simulation of the plasma used to integrate these devices.
Key terms
- Quantum dot
- A semiconductor crystal a few tens of nanometers or less in size. It can confine electrons and make them emit light.
- Spin
- A tiny magnet-like property of electrons. Bias in its direction can be used as information.
- Optoelectronic information conversion
- Transferring electrical signals and optical signals to each other.
NewsLab news
Two students received the Japan Society of Applied Physics Young Scientist Presentation Award and a Poster Award
A student received the Japan Society of Applied Physics Young Scientist Presentation Award
Results of joint research with Kwansei Gakuin University and others were published in Angewandte Chemie International Edition
Results on a photodiode that detects near-infrared polarized light were published in Applied Physics Letters
A student received the Japan Society of Applied Physics Young Scientist Presentation Award
ResearchResearch themes
The lab studies "optoelectronic information conversion" technology, which links electronic information processing by computers with optical communication on the internet. It develops nanoelectronic materials, starting with semiconductor quantum dots, and high-performance, low-power optoelectronic conversion devices.
*Illustrative imageOptoelectronic Spin Information Conversion
With semiconductor quantum dots, information on electron spin can be converted to and from circularly polarized light, which corresponds to the spin of light. The lab is developing spin-polarized light-emitting diodes (spin LEDs) that can send electron spin information directly as circularly polarized light.
*Illustrative imageQuantum Dots That Amplify Spin
In joint research with an overseas group, the lab realized a new quantum dot material that can efficiently amplify and recover the spin polarization of electrons in semiconductors, which is easily lost at room temperature, from room temperature up to 110°C. The lab also proposes spin LEDs that use these quantum dots.
*Illustrative imageOptical Spin-Modulation Field-Effect Devices
This research controls electron spin at ultrahigh speed using only the operation of an electric field, without any magnetic field, whereas such control normally requires a strong magnetic field of several teslas. It leads to the development of integrable polarization modulators that operate in the gigahertz range.
*Illustrative imageComputational Analysis of Process Plasma
Plasma is used in the process of integrating semiconductor devices. Through computational analysis, the lab clarifies the characteristics of the plasma used in that process.
MembersFaculty
The members of the Electronic Materials Lab are faculty, technical staff, technical assistants, administrative assistants, and students in the doctoral, master's, and undergraduate programs.As of 2026
- ProfessorSatoshi Hiura
- Associate ProfessorHirotake Sugawara
- Project ProfessorAkihiro Murayama
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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: “CdTe quantum dots plasmachem” PlasmaChem GmbH, Berlin, Germany. Original uploader was Antipoff at en.wikipedia / CC BY-SA 4.0 (cropped)
- Optoelectronic Spin Information Conversion: “Field lines around magnets” Tangopaso / Public domain (cropped)
- Quantum Dots That Amplify Spin: “Lab Mol Colloidal quantum dots 01” Lab mol (Ilia Litvinov) / CC BY 4.0 (cropped)
- Optical Spin-Modulation Field-Effect Devices: “FMN Lab electro-optical integrated modulator” FMNLab / CC BY 4.0 (cropped)
- Computational Analysis of Process Plasma: “Energy Arc (central electrode of a Plasma Lamp)” Blaise Frazier aka PiccoloNamek / CC BY-SA 3.0 (cropped)
- Related lab (Nano Material Properties Engineering Lab): “Stretchable Electronics” Steve Jurvetson from Menlo Park, USA / CC BY 2.0 (cropped)
- Related lab (Advanced Data Science Lab): “NSOC-2012” Unknown photographer / Public domain (cropped)
- Related lab (Integrated Electronic Devices Lab): “Gold Nano Anchors Put Nanowires in Their Place ( )” National Institute of Standards and Technology / Public domain (cropped)
- Related lab (Advanced Nano-Electronic Materials Lab): “Molecular beam epitaxy system” ENERGY.GOV / Public domain (cropped)
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