Members
Lab. members
Research activity
Integration of dissimilar materials and their applications to highly sensitive sensors
●Background
Odors are a collection of volatile organic compounds (VOCs), and their detection technology can be applied to a wide range of fields, including food quality control, medicine and pharmaceuticals, and safety inspections. It has a large impact on society, and is expected to develop in the field of sensing technology. We are developing sensors, especially optical sensors, that identify odors with high sensitivity by fabricating sensor chips using dielectric materials (Si, SiO2) and metals (Au, Al, Co, Fe) and chemically modifying them. The final target of our research is to pursue the application and social implementation of fabricated sensors to the variety fields including agriculture, chemical engineering, and life science, through the collaborations. Would you like to work with us to develop high-sensitivity sensors using cutting-edge research facilities including clean rooms and electron beam lithography equipment? Recent research themes are as follows.
Main subjects
●Highly sensitive and selective chemical sensors and thier applications based on silicon photonics
Based on various substrates and materials such as silicon and glass, we aim to achieve highly sensitive and selective detection of volatile organic compounds with sensor chips with improved refractive index resolution and modifications of biomaterials (Olfactory receptors and DNA). Recent publications and presentations H. Shimizu, Elsevier Reference Collection in Biomedical Sciences 2022, "Physical Sensors: Optical Sensors", DOI: 10.1016/B978-0-12-822548-6.00099-6. Y. Tomono, and H. Shimizu, “CO2 Detection with Si Slot Waveguide Ring Resonators toward On-chip Specific Gas Sensing”, CLEO / QELS 2019, JTh2A.96. https://doi.org/10.1364/CLEO_AT.2019.JTh2A.96
●Highly sensitive and selective chemical sensors and thier applications based on surface plasmons
We aim to improve the refractive index resolution by utilizing surface plasmon waves at the interface between metal and dielectric, and to detect volatile organic compounds with high sensitivity and selectivity. We aim to increase the sensitivity of sensors by using visible, and ultraviolet light, and by introducing the magneto-optical effect of ferromagnetic metals. Recent publications and presentations H. Shimizu, R. Ogino, R. Minowa, and M. Hasumi, “Highly sensitive detection of biogenic volatile organic compounds by SPR sensor with Al thin film decorated with graphene oxide and violet light source”, ACS Fall 2024, 4102729) H. Shimizu, T. Ogura, M. Kawaguchi, S. Takamatsu, and K. Ikebukuro, “Enhanced ethanol gas detection signal by the surface plasmon resonance sensor with the ss-DNA decorated wedge-shaped Au thin film”, BIOSENSORS 2023, 0390. C. Rizal, H. Shimizu, and J. R. Mejia-Salazar, ”Magneto-Optics Effects: New Trends and Future Prospects for Technological Developments”, Magnetochemistry 8, 94 (2022). https://doi.org/10.3390/magnetochemistry8090094 H. Shimizu, T. Ogura, T. Maeda, and S. Suzuki, “A Wedge-Shaped Au Thin Film: Integrating Multiple Surface Plasmon Resonance Sensors in a Single Chip and Enhancing the Figure of Merit”, Frontiers in Nanotechnology. 3, 724528 (2021). https://doi.org/10.3389/fnano.2021.724528 T. Kaihara, T. Shimodaira, S. Suzuki, A. Cebollada, G. Armelles, and H. Shimizu, “Fe thicknesses dependence of attenuated total reflection response in magnetoplasmonic double dielectric structures: angular versus wavelength interrogation”, Japanese Journal of Applied Physics, 58, 122003 (2019). https://doi.org/10.7567/1347-4065/ab5205
●Plasmonic Si waveguide heater
We are aiming for local heating based on highly efficient photothermal conversion by fabiricated a metal film on a Si wire waveguide. We will realize ultra-compact and high-density optical switches, which are essential for optical interconnections with photonic integrated circuits, as well as optical buffering memory. It can also be applied to lab-on-a-chip and on-chip optical sensors in various fields such as biotechnology and chemistry. Recent publications H. Shimizu, K. Shinohara, and M. Hasumi” Improvement of photothermal heating efficiency of Si plasmonic waveguide heaters with ring resonators” Japanese Journal of Applied Physics, 63, 052004 (2024). https://doi.org/10.35848/1347-4065/ad40ec N. Ota, K. Shinohara, M. Hasumi and H. Shimizu, ”Quantification of 288 K local photothermal heating and miniaturization in Si plasmonic waveguides integrated with resonators” Japanese Journal of Applied Physics, 62, 042002 (2023). https://doi.org/10.35848/1347-4065/acc917 N. Ota, T. Miyauchi, and H. Shimizu, “221K Local Photothermal Heating in a Si Plasmonic Waveguide Loaded with a Co Thin Film”, Sensors, 21(19), 6634 (2021). https://doi.org/10.3390/s21196634
●Remote sensing of the concentration of the global warming gases by fiber loop ring down methods
We have set up remote sensing of carbon dioxide, methane, by combining the technique of the optical fiber telecommunication. We measured carbon dioxide concentration of 0.05% by fiber loop ring down methods 10). 10) H. Shimizu and H. Noriyasu, “Measurement of carbon dioxide concentration by fiber-loop ring-down spectroscopy for continuous remote measurement” Japanese Journal of Applied Physics 53(11):116601 (2014).
Publication list
Publication list
Presentations / Invited talks
Doctoral dissertation
Dr. Terunori KAIHARA "Study of performance improvement of magneto-optical surface plasmon polaritons with Fe", Mar. 2017, Doctor (Engineering)
Please contact to h-shmz atmark cc.tuat.ac.jp about the papers and questions about our research.
Seminar
Seminar with collaborators
