Hongo Campus
Graduate SchoolGraduate School of Engineering - Electrical Engineering and Information Systems
DepartmentDepartment of Electrical and Electronic Engineering
Complex Systems & Bioelectronics Course
Life
Medical system
Nanobioscience
Thin film/Surface and interfacial physical properties
General applied physics
Electronic materials/Electric materials
Semiconductor
Healthcare Technology
Biosensing/imaging
Brain-mimicking Beyond AI devices using spin waves and fluctuations and quantum technology for information processing and medical engineering applications
Research on brain-mimetic devices utilizing spin fluctuation, focusing on the spinciple that signal processing in neurons is equivalent to the Hamiltonian of a physical property called spin glass. Also, research is being conducted on applying spin wave quantum interference, resonance tunneling phenomena, and stochastic resonance principles, which can be operated at room temperature, to information processing devices to achieve low power consumption, and on ultra-sensitive measurement of bio-related information such as magnetoencephalography, magnetocardiography, and body gases.
Research field 1
"Fluctuation" electronics learned by life
Focusing on the fact that the spin glass Hamiltonian, a spin property, has the same formula as the model formula that mathematically describes information processing in the brain, we are studying new neuromorphic devices using spin fluctuation properties. We are studying neuromorphic devices that electrically detect spin angular momentum (spin wave / magnon) in a heterojunction of iron-based garnet thin film, a magneto-optical material, and Pt with large spin-orbit interaction by inducing spin fluctuation.
Research field 2
Dirack electronic system THZ Wave Plas Monix's medical and engineering applicable
The frequency of the terahertz wave band matches the resonance frequency of intermolecular bonds and hydrogen bonds. Plasmon resonance measurement using electromagnetic waves of this wavelength is expected to produce. Therefore, plasmon resonance measurements using electromagnetic waves of this wavelength can be expected to produce a synergistic effect of the two resonance phenomena of intermolecular vibration resonance and surface plasmon resonance. In addition, plasmon resonance measurements of topological insulators, transition metal chalcogenides, and other materials are expected to have a synergistic effect.
High electron mobility due to relativistic Fermi particles with zero mass (low energy loss)
High electron mobility (low energy loss) due to relativistic Fermi particles with zero mass
High sensitivity and low power consumption spin sensing by magnon (spin) x phonon (dipole) resonance with Dirac electron-based plasmon is expected.
Research field 3
ELECTRIC NOSE -Electronic nose watching our health-
In the past, the relationship between body gas and health status was known as olfactory diagnosis, which depended on the physician's intuition and experience, and was difficult to quantify objectively. We are developing an ultra-sensitive electronic nose (E-Nose) technology to elucidate the correlation between health conditions and body gases. It is also expected to detect viruses.
(1) Selective concentration of body gas using functional porous material (zeolite).
(2) The concentrated gas is measured using an oxide semiconductor with a controlled nanostructure. This combined function achieves an ultra-sensitivity of 1 ppb (parts per billion) to 1 ppt (parts per trillion). Oxide semiconductor core-shell nanorods with a two-layer structure (adsorption layer/detection layer) in the gas detection area, and self-assembled nanowire gas sensors by biomineralization of genetically modified mosaic virus templates are being studied.