【The 1st Science Salon】 ～Latest Nano Technology & Advanced Material Technology Research～

Speech Title:

Development of sodium-ion battery

Speaker:    

Prof. Shinichi Komaba, Tokyo University of Science, Japan

Abstract:

Sodium-ion batteries made from earth-abundant metals are attracting much attention as next-generation rechargeable battery, as some companies are planning their commercialization. Recent trend and perspective of the battery materials and technology will be introduced in scientific and practical points of view.

Speech Title:  

Laser-assisted thermal nanoimprinting of functional surface

Speaker:     

Assoc. Prof. Keisuke Nagato, Tokyo University, Japan

Abstract:

Micro/nanostructured surface on material express a variety of functions interacting with light, thermal fluid, force, electron, chemicals, and biological materials. This paper introduces the high-throughput large-area manufacturing methods; laser-assisted thermal nanoimprinting (LATI). In LATI, a laser heats the mold surface and the thermoplastic polymer film is melted by heat conduction, and the mold nanostructures are replicated onto the polymer surface. Some applications such as optical films are also introduced.

Speech Title:

Mist deposition technology as a cost-effective method and its application to Oxide semiconductor growth

Speaker:   

Honorary Prof. Shizuo Fujita, Kyoto University, Japan

Abstract:

I will introduce mist deposition technology as an environmental-friendly, safe, and cost-effective non-vacuum-based film deposition method. Here, a solution containing constituent elements of the target thin film is ultrasonically atomized, and the mist particles hence formed are transferred to the reaction area to form films. As examples of applications, I will show the characteristic features, up-to-date results, and future prospects of Ga2O3 and MgZnO, which are promising materials for power devices and deep ultraviolet emissions, respectively.

Speech Title:

Research and development on gallium oxide device technologies

Speaker:   

Prof. Masataka Higashiwaki, Osaka Metropolitan University, Japan

Abstract:

Gallium oxide (Ga2O3) possesses superior physical properties based on its extremely large bandgap. Furthermore, it has an attractive feature from industrial perspective that large-size, high-quality single-crystal wafers can be produced from melt-grown bulk crystals at low cost. In this talk, after an introduction to basic physical properties of Ga2O3, I will provide an overview of the state-of-the-art Ga2O3 epitaxial growth and electronic device technologies.

Speech Title:

Electronics-Photonics Integration with Compound Semiconductor Technologies

Speaker:  

Chair Prof. Kei May Lau, Hong Kong University of Science & Technology, Hong Kong

Abstract:

In recent decades, increased demand for RF (5G), light-emitting, optical communication, and power devices has fostered the development of compound semiconductors (mainly from column III and V of the periodic table) to maturity. These semiconductors are now widely used in display, lighting, telecommunication optical fiber networks, and power switching.  In addition to the speed and bandwidth advantages, sending data via photons instead of electrons can potentially be much more energy efficient.

Photonic integrated circuits made with compound semiconductors are costly and limited. The eventual goal is to integrate photonics with electronics on the same silicon platform, so that data communication and processing can be performed on a single tiny silicon chip with energy-efficiency, high speed, and minimal delay.