• We develop technology of the cyclotron accelerator and its application as follows. 1)Ion source (particularly heavy ion source), 2)design of ion optics, 3)device control system for the cyclotron, 4)RF system, 5)detectors for charged particles, gamma ray, and neutron, 6) radiation test by ion and neutron beam.

We have beam lines dedicated to the neutron irradiation and the ion irradiation, respectively. We can provide fast neutron beam (20-70 MeV), and various ion beam such as p, alpha, and heavy ions up to Xe. We also develop a neutron imaging technique using fast neutron.

• Recently, with a spread of high definition video streaming services and ubiquitous network, development of high-quality, ultra-realistic and low-power display systems has been demanded. We have been studying physical properties of liquid crystal materials, precise control technique of polarization, high performance liquid crystal display (LCD) devices and its application to the advanced display systems for the realization of new media such as electric paper display and digital signage display, and low-energy society. We established a polarization control technology which realizes a precise control of polarization with liquid crystal materials. By using this world-leading technology, we have been studying the control of the surface alignment of liquid crystal molecules and developed a wide-viewing angle and fast switching liquid crystal display, ultra-high definition field-sequential-color display (Fig. 1), ultra-low power reflective full-color display (Fig. 2) and large-size high-quality display system.
• We are also studying the ultra-realistic display systems such as a spatial 3D display and a multiple directional viewing display based on the precise light control technique as a next generation interactive communication technologies (Fig.3). We hope to conduct collaborative research with a willing company for a practical application of this technology in industry.

• A new dry-contact technique for transduction of broadband, high-frequency ultrasound via a solid layer inserted between water and the sample, whereat the pressure of about 0.1 MPa is applied at the layer/sample interface by evacuating air between them, has been developed. Based on the technique, acoustic imaging of an electronic package is realized under the dry environment (Fig. 1). Typically, the polymer films are used as the intermediate layer for water protection of the sample, and by utilizing the acoustic resonance phenomenon among water, film and the sample, higher quality acoustic image of the testing sample than that for the water immersion case can be recorded without getting the sample wet (Fig. 2). Moreover, thin materials, e.g., polymer film (Fig. 3), etc. can be characterized by analyzing the acoustic resonance phenomenon among the three media. We hope to conduct collaborative research with a willing company for a practical application of this technology in industry.

• 1) We investigate interesting properties of nanostructures and develop materials and devices utilizing nanostructures.
• 2) We have techniques and skills on low-noise electric measurements, cryogenics, nanofabrication, and data informatics. We are open to new collaborations.

• The main research subjects in this group are the experimental investigations of the organic molecular conductors. The characteristic properties of the organic materials are multiple flexibilities owing to the assemble structure of nanometer-size molecules. This flexbility comes up recently for developing the organic electronic devices. We explore the fundamental electronic properties of the organic molecular materials which have wide range of the ground states from superconductivity to insulating states resulting from the strongly correlated electrons in the molecular pi-orbital. Such features are closely connected to flexible and multiple degrees of freedom in charge, spin, molecular latticeand molecules themselves. We are actively studying on the interesting and important issues in the condensed matter physics from the viewpoints of the characteristic flexbility of the organic molecular materials. We are prepared to provide academic consultations to companies interested in our research.

• The emergence of stress corrosion cracking is one of the most important issues from the viewpoint of aging management and maintenance of nuclear power plants. There is a large discrepancy between stress corrosion cracking and other cracks such as fatigue cracks from the viewpoint of nondestructive testing and evaluations, which requires suitable specimens containing stress corrosion cracking for the development of nondestructive testing and evaluation techniques and also for personnel training. However, artificially introducing stress corrosion cracking needs large cost and long time. Furthermore, several studies have pointed out that such articial stress corrosion cracking is not always similar to natural ones. On the basis of the background above, we develop a method to fabricate "imitative" stress corrosion cracking specimens using diffusion bonding.

The method enables one to introduce a region whose response is almost identical to actual stress corrosion cracking from the viewpoint of nondestructive testing. Whereas the dimension of the region is accurately controllable, the method requires much less cost and time comparing the conventional ones using corrosive environment. Patent is already applied for.

• One of our major research focuses is to design the novel drug nanoparticles, so called “Nano-prodrugs”, and to apply them as anticancer drugs or eye drops with excellent delivery efficiency. Nano-prodrugs are constructed by synthetic prodrugs molecules which contains poorly water-soluble substituent. They could be fabricated to nanoparticles with 100 nm or less in size by our reprecipitation technique, which has been used to create organic nanomaterials. We are aiming at practical application of our Nano-prodrugs in the near future.

Our reprecipitation technique for fabricating organic nanomaterials is a versatile technique that can be applied to various organic molecules as well as drug compounds. We hope to conduct collaborative research with a willing company on controlling and evaluating properties of the organic nanoparticles.