Eiji OHMICHI

Eiji OHMICHI

D. Sci., Kyoto University, 2000
Associate Professor

Research group: Condensed Matter Experiments
Phone: +81-78-803-5656
E-mail: ohmichiharbor.kobe-u.ac.jp

Research Description

Microdevices such as microcantilevers and nanomembranes enable measurements with extremely high sensitivity compared to conventional methods.
Our group combines these devices with extreme environments and terahertz waves to enable unique measurements.
Specifically, we are developing force-detected terahertz electron spin resonance and coherent terahertz spectroscopy using a photomixer.
Our aim is to develop novel experimetnal techniques using such microdevices and to measure physical properties in a wide range of material systems from antiferromagnets to metalloproteins.

Main Publications

1. "Rapid-scan broadband frequency-domain terahertz spectroscopy via dynamic optical phase lock", Yuto Shoji, Eiji Ohmichi, Hideyuki Takahashi, and Hitoshi Ohta, Applied Physics Letters 125 (2024) 031102/1-6.
2. "Modified diabolo antennas for broadband enhancement of sub-terahertz oscillating magnetic fields", Eiji Ohmichi, Ryoto Takigawa, Yuma Igo, and Hitoshi Ohta, Optics Express 32 (2024) 22331-22339.
3. "Frequency-domain antiferromagnetic resonance spectroscopy of NiO", Eiji Ohmichi, Yuto Shoji, Hideyuki Takahashi, and Hitoshi Ohta, Journal of the Physical Society of Japan 91 (2022) 095001/1-2.
4. "Frequency-domain electron spin resonance spectroscopy using continuously frequency-tunable terahertz photomixers", Eiji Ohmichi, Yuto Shoji, Hideyuki Takahashi, and Hitoshi Ohta, Applied Physics Letters 119 (2021) 162404/1-5.
5. "Force detection of high-frequency electron spin resonance near room temperature using high-power millimeter-wave source gyrotron", Hideyuki Takahashi, Yuya Ishikawa, Tsubasa Okamoto, Daiki Hachiya, Kazuki Dono, Kanata Hayashi, Takayuki Asano, Seitaro Mitsudo, Eiji Ohmichi, and Hitoshi Ohta, Applied Physics Letters 118 (2021) 022407/1-5.
6. "Terahertz electron paramagnetic resonance spectroscopy using continuous-wave frequency-tunable photomixers based on photoconductive antennae", Eiji Ohmichi, Tatsuya Fujimoto, Keisuke Minato, and Hitoshi Ohta, Applied Physics Letters 116 (2020) 051101/1-5
7. "Force-detection of high-frequency electron paramagnetic resonance spectroscopy of microliter solution sample", Tsubasa Okamoto, Hideyuki Takahashi, Eiji Ohmichi, Haruto Ishikawa, Yasuhisa Mizutani, and Hitoshi Ohta, Applied Physics Letters 113 (2018) 223702/1-4.
8. "Pressure effect on zero-field splitting parameter of hemin: model case of hemoproteins under pressure", Tsubasa Okamoto, Eiji Ohmichi, Yu Saito, Takahiro Sakurai, and Hitoshi Ohta, Journal of Physical Chemistry B 122 (2018) 6880-6887