LAB LOGA page on LabLog, a review site (not the lab's official page)
Tokunaga Lab
Machine-translated · View original
A lab studying the optical properties of matter, probing light–matter interaction through spectroscopic experiments.
AboutAbout the lab
Nothing is as mysterious as light.
The Tokunaga Lab studies the optical properties of matter, investigating through experiments with various spectroscopic methods how light and matter act on each other.
It is interested in tiny semiconductor particles, crystals of organic molecules, photosynthesis and light-driven hydrogen production that makes use of it, and the optical nonlinearity that materials exhibit.
Its themes are wide-ranging, including techniques for observing physical properties inside cells and changes in the refractive index when an electric field is applied to water.
The lab's website says, "Nothing is as mysterious as light. If light could be controlled at will, the world would surely be full of wonders."
Key terms
- Optical properties of matter
- A field that studies the interaction between light and matter. It probes matter with light to clarify its physical properties.
- Pockels effect
- A phenomenon in which the refractive index of light changes when an electric field is applied to a material. This lab discovered a giant effect in water.
- J-aggregate
- A type of molecular aggregate in which molecules are arranged side by side. Compared with a single molecule, its absorption band shifts to the lower-energy side and becomes sharper.
NewsLab news
A method for culturing Euglena in tomato juice has been developed
A paper by Assistant Professor Kyohei Yamashita was selected for the Back cover of Sustainable Food Technology
ResearchResearch themes
The Tokunaga Lab is an experimental lab in the optical properties of matter that studies light–matter interaction. It is particularly interested in semiconductor quantum dots, nano organic molecular crystals and their excitons, photosynthesis and light-driven hydrogen production, and the optical nonlinearity exhibited by materials, and it studies them with various spectroscopic methods.
*Illustrative imageObserving the physical properties of living cells
To understand medicine as physics, the lab aims to establish techniques that can observe temperature, molecular distribution, and absorption and emission spectra inside living cells, resolved in both time and space.
*Illustrative imageControlling how molecules assemble with light
This research uses light-induced forces to control, with light, the state in which molecules and atoms assemble. The lab works on assembling molecules in water at room temperature to create crystals that do not exist in equilibrium (non-equilibrium crystals).
*Illustrative imageBending light with an electric field in water
The lab discovered the giant Pockels effect in water, in which the refractive index changes greatly when an electric field is applied, and aims to manipulate light freely. It also works on optical upconversion, which produces visible light from heat rays.
*Illustrative imageOptical properties of organic nanostructures
The lab pursues organic (carbon, hydrogen, oxygen, nitrogen) nanotechnology. It has found a giant electro-optic effect in porphyrin J-aggregates and is also elucidating the mechanism behind the size effect on absorption in organic nanocrystals.
MembersFaculty
The members of the Tokunaga Lab are faculty, researchers, and students in the doctoral program, master's program, and undergraduate program (students doing graduation research).As of 2024
- ProfessorEiji Tokunaga
- Assistant ProfessorKyohei Yamashita
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 Tokunaga Lab
Taishi LabFaculty of Science Division I, Department of PhysicsCondensed matter physics I
Murayama LabFaculty of Science Division II, Department of PhysicsCondensed matter physics I
Yamamoto LabFaculty of Science Division I, Department of PhysicsNanostructure Physics, Condensed Matter Physics I
Sakata LabFaculty of Science Division I, Department of PhysicsCondensed matter physics IIThe 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: “Light spectrum on a white wall caused by sunlight going through prism and handmade lampshade” Pittigrilli / CC BY-SA 4.0 (cropped)
- Observing the physical properties of living cells: “Microscope à fluorescence (Ifremer )” Olivier Dugornay / CC BY 4.0 (cropped)
- Controlling how molecules assemble with light: “Laser LY-RGBW01 internals optical table shining in smoke PC301984” Alexey Vazhnov / CC BY-SA 4.0 (cropped)
- Bending light with an electric field in water: “Refraction photo” ajizai / Public domain (cropped)
- Optical properties of organic nanostructures: “Organic crystal 2” RemiJos / CC BY 4.0 (cropped)
- Related lab (西原研究室): “Carbon Nanotube Purity ( )” National Institute of Standards and Technology / Public domain (cropped)
- Related lab (村山研究室): “Nanoart “Scorched Earth”” Яна Сичікова і Сергій Ковачов / CC BY 4.0 (cropped)
- Related lab (山本研究室): “Carbon nanoribbon povray” Arnero / Public domain (cropped)
- Related lab (坂田研究室): “Scanning tunneling microscope-MHS 2237-IMG 3814” Rama / CC BY-SA 3.0 fr (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.