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Asano Lab
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The lab explores the properties of electrons in semiconductors through theory and computation.
AboutAbout the lab
Solving the behavior of electrons in semiconductors with theory and computation
The Asano Lab (Quantum Condensed Matter Theory Group) studies the properties of electrons in semiconductors through theory and computation.
It deals with phenomena involving at least one of the following: microstructures, low-dimensional systems such as graphene, long-range Coulomb interactions between electrons, and optical response spectra.
The lab studies the system of electrons and holes created in a semiconductor under light irradiation as a subject that can be called a microcosm of materials science.
For graduation research, the lab accepts students from the Department of Physics and from the Life Science Course of the Department of Biological Sciences; at the graduate level, it accepts students from the Department of Physics, Graduate School of Science.
Key terms
- Exciton
- A bound state of an electron excited by light and a hole, the vacancy left by the electron
- Hole
- A vacancy left by an electron in the valence band, which behaves like a positively charged particle
- Coulomb interaction
- The force between charged particles: repulsive for like charges and attractive for opposite charges
NewsLab news
A paper co-authored with researchers at the University of Tokyo was published in Physical Review B
A paper on polyexcitons in two-dimensional semiconductors was published in Physical Review B
ResearchResearch themes
The lab uses theory and computation to study the effects that electrons in semiconductors exert on one another and their response to light. As an example, it studies the properties of the system of electrons and holes formed in a semiconductor that is strongly excited by light.
*Illustrative imagePolyexcitons in two-dimensional semiconductors
The lab studies polyexcitons, in which multiple excitons bind together. Numerical calculations showed that in two-dimensional systems with a multivalley band structure, restrictions from the Pauli exclusion principle are relaxed, allowing excitonic trimers and tetramers to form.
*Illustrative imageGlobal phase diagram of electron-hole systems
In papers from 2011 to 2014, the lab developed a theoretical method that can draw phase diagrams over a wide range of densities and temperatures for the electron-hole system in strongly photoexcited semiconductors, and applied it to quantum wire systems. The method also reproduces experimental data on optical absorption gain spectra semiquantitatively.
MembersFaculty
The members of the Asano Lab consist of faculty members and doctoral, master's, and undergraduate students.As of 2026
- ProfessorKenichi Asano
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: “Wafer with Pentium chips” Naotake Murayama from Los Altos, CA, USA / CC BY 2.0 (cropped)
- Polyexcitons in two-dimensional semiconductors: “CdSeNanoplatelets” Kabotin / CC BY-SA 4.0 (cropped)
- Global phase diagram of electron-hole systems: “Diode laser” 作者不詳 / Public domain (cropped)
- Related lab (Kuroki Lab): “Α-Samarium crystal structure” Forbes72 / CC BY-SA 4.0 (cropped)
- Related lab (Yoshino Lab): “DAGATA-Detektor Monte Carlo Simulation with Geant4” Babbsack / CC BY-SA 3.0 (cropped)
- Related lab (Nishioka Lab): “CMBsphere” Pablo Carlos Budassi / CC BY-SA 4.0 (cropped)
- Related lab (Kudo Lab): “Magnetic Levitation Experiment, Science Gallery Dublin, Ireland” Maria Delaney / CC BY-SA 4.0 (cropped)
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