LAB LOGA page on LabLog, a review site (not the lab's official page)
Quantum Device Physics Lab
Machine-translated · View original
Using light from THz to ultraviolet, the lab studies how light interacts with matter and builds optical devices.
AboutAbout the lab
What happens between light and matter
The Quantum Device Physics Lab studies the interaction between light and matter, aiming to create optical devices unlike any that exist today.
The wavelengths it works with are wide-ranging, from THz waves with wavelengths reaching 100 micrometers to ultraviolet at around 200 nanometers, and the lab also targets nano- and microstructures.
Using advanced equipment such as instruments that can measure optical properties at the nanometer scale and ultrashort pulse lasers, the lab investigates phenomena such as quantum interference.
It also carries out theoretical calculations, seeking to understand physical phenomena from new perspectives.
Key terms
- Phonon
- A quantum of the lattice vibrations that travel through a crystal, counted as a discrete, particle-like unit. Phonons determine how heat is conducted.
- Exciton
- A bound pair of an electron and a hole, created by light, that attract each other. It behaves like a hydrogen atom.
- Raman spectroscopy
- A measurement method that shines light on a material and reads the material's vibrations from the scattered light, whose color has shifted slightly.
NewsLab news
Paper on Raman spectroscopy of strain in semipolar AlN published in Applied Physics Letters
Paper on Raman imaging of GaInN/GaN heterostructures published in Physica Status Solidi B
Paper on the temperature dependence of nonradiative recombination in quantum wells published in Physica Status Solidi B
Paper on mid-infrared emission from surface microstructures published in Japanese Journal of Applied Physics
Paper on exciton distribution and transition characteristics in quantum wells published in Physica Status Solidi B
ResearchResearch themes
Building on spectroscopic methods, and at times applying plasma spectroscopy methods as well, the lab aims to create new concepts. It aims to control the interaction between light and matter over a wide range from the THz region to the ultraviolet region, and to realize ultraviolet, infrared, and THz light-emitting devices and ultra-high-efficiency solar cells.
*Illustrative imageFundamental Properties of Ultraviolet Light-Emitting Devices
An exciton, a bound pair of an electron and a hole, behaves like a hydrogen atom. By incorporating phonon processes into the analysis method of hydrogen plasma spectroscopy, the lab analyzes how carriers move inside ultraviolet light-emitting devices. Believing that controlling the interaction between phonons and excitons could greatly increase emission efficiency, the lab is searching for semiconductor structures that make this possible.
*Illustrative imageEvaluation and Control of Phonon Transport
Using micro-Raman spectroscopy with two lasers of different wavelengths applied simultaneously, the lab measures both heat generation and heat transport in materials such as nitride semiconductors, and visualizes them at the nanometer scale. It also works on thermal rectification, which biases the direction of heat flow by using crystal interfaces, and on new device designs based on heat dissipation and heat confinement.
*Illustrative imageCreating Optical Devices for the Infrared–THz Region
The lab was the first to observe THz radiation caused by longitudinal optical phonon resonance from microstructures fabricated on a semiconductor surface. Building on this, it aims to realize new THz devices and quantum interference effects that combine phonon and electron systems, controlling optical absorption spectra on the basis of quantum theory.
MembersFaculty
The members of the Quantum Device Physics Lab are faculty, technical staff, and students (including international students) in the doctoral program, the master's program, and the undergraduate program.As of 2026
- ProfessorYoshihiro Ishitani
- Assistant ProfessorBei Ma
VoicesStudent voices
Ratings and reviews reflect the experiences of individual current or former students, not the lab's official views. Whether a lab has reviews, or how many, says nothing about the lab itself.
Students who take part in an interview may receive a thank-you gift worth ¥1,000, regardless of what they say.
Student ratings (0 students)
--
--
--
--
--
--
Student voices answer questions like these
- What's great about this lab?
- What did you learn after joining?
- What's the vibe, and what is the professor like?
- Who is this lab for?
- Where do graduates go?
Your experience can help younger students choose their lab. Your name won't be shown.
Write a lab reviewAnonymous · Your draft is saved if you stopRelatedLabs similar to Quantum Device Physics Lab
Aoki LabFaculty of Engineering, Department of EngineeringResearch on quantum effects emerging in nanoscale structures…
Miyamoto LabFaculty of Engineering, Department of EngineeringA laboratory studying light, aiming to explore and elucidate…
Materials Engineering Lab (Itoi Lab)Faculty of Engineering, Department of EngineeringMaterials engineering laboratory in the field of "Materials,…
Yamamoto LabFaculty of Engineering, Department of EngineeringResearch on superconductors and semiconductors based on cond…The 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: “Close-up of glass crystal with many facets causing dispersion spectrum from light” Pittigrilli / CC BY-SA 4.0 (cropped)
- Fundamental Properties of Ultraviolet Light-Emitting Devices: “UV LED Fluoresence” Wtshymanski / CC BY-SA 3.0 (cropped)
- Evaluation and Control of Phonon Transport: “AFM-Raman microscope” AAMonitor96 / CC BY-SA 3.0 (cropped)
- Creating Optical Devices for the Infrared–THz Region: “Terahertz freq. metamaterial modulator” Hou-Tong Chen (Los Alamos National Laboratory) / Public domain (cropped)
- Related lab (Aoki Lab): “Molybdenite in quartz” Eurico Zimbres Zimbres / CC BY-SA 3.0 (cropped)
- Related lab (Miyamoto Lab): “Laser LY-RGBW01 internals optical table shining in smoke PC301982” Alexey Vazhnov / CC BY-SA 4.0 (cropped)
- Related lab (Materials Engineering Lab (Itoi Lab)): “Gray gold microstructure” Djhé / CC BY 4.0 (cropped)
- Related lab (Yamamoto Lab): “ITER Central Solenoid CICC ( )” Charlie Sanabria / CC BY-SA 2.0 (cropped)
About LabLog
LabLog is a lab review app for students only. Student members at each university interview students in labs and publish what they say. Student voices can only be read by students who sign up with a university email address. Operated by bestiee Inc.
Learn more about LabLog ↗Search engines and AI may reference the basic lab info and rating summaries on this page and the description of LabLog. Student voices are for student members only. Automated collection by programs (scraping, or input to or training of AI) is prohibited under Article 8 of the Terms of Service. If you need data for research or analysis, please contact us.