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Optical Properties and Quantum Transport Physics Lab
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The lab explores quantum effects in the nanoscale world through light and electrical conduction.
AboutAbout the lab
Confining electrons and light to observe quantum effects.
The Optical Properties and Quantum Transport Physics Lab studies the optical properties and electrical conduction of semiconductors with nanoscale structures.
When electrons or light are confined in an extremely small space, quantum effects appear clearly in the response to light and in electrical conduction.
These effects make it possible to control the interaction between matter and light.
Using extreme techniques such as semiconductor microfabrication, cryogenic temperatures and strong magnetic fields, and the measurement of extremely small currents and voltages, the lab aims to search for and elucidate new physical phenomena.
Key terms
- Quantum effects
- Quantum-mechanical behavior that appears when electrons or light are confined in an extremely small space, and that cannot be seen at ordinary scales
- Time-resolved spectroscopy
- A method that applies very short pulses of light and measures the changes occurring inside a material over time
- Carbon nanotube
- A thin material in which carbon atoms are joined into a tube, with a diameter of only a few atoms
ResearchResearch themes
The lab measures light scattering and emission from semiconductor nanostructures and single molecules, as well as quantum transport, to investigate the physical properties of electron systems confined in low dimensions. It also develops its own measurement methods and instruments for this purpose.
*Illustrative imageOptical Measurements and Quantum Transport in Semiconductor Nanostructures
The lab studies the distinctive optical properties and quantum transport of two-dimensional electron systems in semiconductors, graphene, carbon nanotubes, and similar materials, at cryogenic temperatures and under strong magnetic fields.
*Illustrative imageCarrier and Spin Dynamics
To clarify how carriers and spins move in confined electron systems, the lab performs ultrafast time-resolved spectroscopy using femtosecond pulsed lasers and precision spectroscopy using wavelength-tunable semiconductor lasers developed in the lab.
*Illustrative imageOptical Properties of Unique Nanomaterials
The lab focuses on two-dimensional interfaces of transition metal oxides, monolayer nanomaterials, and composite nanomaterials. It develops methods that combine precision laser spectroscopy with conduction measurements to explore new properties and functions and their physical origins.
MembersFaculty
The members of the Optical Properties and Quantum Transport Physics Lab are faculty members, and master's and undergraduate students.As of 2024
- ProfessorKenichi Oto
- ProfessorYasuhiro Yamada
- ProfessorHirofumi Mino
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: “Cold atoms experiment 01” Tomasz Kawalec / CC BY-SA 4.0 (cropped)
- Optical Measurements and Quantum Transport in Semiconductor Nanostructures: “Semiconductor Wafer of Microelectronics” DrHughManning / CC BY-SA 4.0 (cropped)
- Carrier and Spin Dynamics: “The inner optical setup of a femtosecond Titanium-Sapphire Pulsed laser” Aksy88 / CC BY-SA 4.0 (cropped)
- Optical Properties of Unique Nanomaterials: “Rastersondenmikroskop, Christine Möller SNI” Christine Möller, SNI / CC BY-SA 4.0 (cropped)
- Related lab (Condensed Matter Theory Lab (Hoshino)): “Stickstoff gekühlter Supraleiter schwebt über Dauermagneten” Henry Mühlpfordt / CC BY-SA 3.0 (cropped)
- Related lab (Experimental Particle Physics Lab): “FASER” Brice, Maximilien / CC BY 4.0 (cropped)
- Related lab (Astrophysics Lab): “Artist’s impression of merging neutron stars (ann17040a)” ESO/L. Calçada/M. Kornmesser / CC BY 4.0 (cropped)
- Related lab (Condensed Matter Theory Lab (Sato)): “HELEN target area” Colin N. Danson et al. / CC BY 4.0 (cropped)
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