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Tackeuchi Lab
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A lab that looks into the world of one trillionth of a second inside semiconductors.
AboutAbout the lab
Exploring one trillionth of a second in semiconductor nanostructures.
The Tackeuchi Lab investigates the various ultrafast phenomena that occur in semiconductor quantum structures and explores their applications.
The lab works on timescales from the picosecond (one trillionth of a second) to the femtosecond (one quadrillionth of a second), the shortest timescales humans can reach.
By irradiating semiconductors with extremely short light pulses from specialized lasers, the lab tracks how electrons behave inside them.
It aims to clarify the physics needed to make devices such as transistors and lasers even faster, and to connect that understanding to applications.
Key terms
- Quantum dot
- An artificial semiconductor structure that confines electron waves within a tiny region of about two hundred-thousandths of a millimeter.
- Pump-probe measurement
- A measurement technique that splits a light pulse in two, using one part to change a sample and the other to observe that change.
- Spintronics
- A field that seeks to use the electron property called spin in the operation of electronic circuits and devices.
ResearchResearch themes
The lab's main research themes are elucidating the various ultrafast phenomena that unfold in semiconductor quantum structures and developing their applications. The picosecond-to-femtosecond time domain is a world in which even light travels only a few microns to a few millimeters, and it holds great potential for both fundamental physics and applications.
*Illustrative imageUltrafast Phenomena in Semiconductors
The fastest phenomena in semiconductors proceed in about one trillionth of a second. Using a specialized laser that emits light pulses about one ten-trillionth of a second wide, the lab tracks what happens inside semiconductor nanostructures.
*Illustrative imageSemiconductor Spintronics
Irradiating a semiconductor with circularly polarized light creates electron spins that are aligned in one direction. Using this property, the lab has proposed a spin-dependent pump-probe technique that observes how the spin direction changes with picosecond precision, and uses it in its research.
*Illustrative imageQuantum Dots
In fine structures called quantum dots, electron waves are confined within a size of about two hundred-thousandths of a millimeter. Performing computation with them is expected to enable calculations far faster than today's computers.
*Illustrative imageNitride Semiconductors
In the semiconductor field, development of blue-light-emitting devices continues. The lab also studies these blue-light-emitting semiconductors, a technology born in Japan that led to products such as the Blu-ray Disc.
MembersFaculty
- ProfessorAtsushi Tackeuchi
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: “Femtosecond laser spark” Smirnov Semen / CC BY 4.0 (cropped)
- Ultrafast Phenomena in Semiconductors: “Femtosecond laser filament” Onlywww / CC BY 4.0 (cropped)
- Semiconductor Spintronics: “Optical table - Up view” Giorgio Brida from Torino, Italy / CC BY 2.0 (cropped)
- Quantum Dots: “EFluor Nanocrystal Vials” Travis.jennings / CC BY 3.0 (cropped)
- Nitride Semiconductors: “Blue light emitting diodes over a proto-board” Gussisaurio / CC BY-SA 3.0 (cropped)
- Related lab (Kita Lab): “5C2A5953R - – Silicon Wafer 20200519” Rob Bulmahn / CC BY 2.0 (cropped)
- Related lab (Sawada Lab): “Quori socially interactive robot platform IMG” Mary Mark Ockerbloom / CC BY-SA 4.0 (cropped)
- Related lab (Morishima Lab): “DBW-Render glass scene, recreated in POV-Ray” Morn / CC0 (cropped)
- Related lab (Aoki Lab): “Fibres optique” Pastèque24 / CC BY-SA 4.0 (cropped)
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