Semiconductor Defect Design Group

STAFF

TERAJI, Tokuyuki; WATANABE, Kenji; CHEN, Jun; INOUE, Junichi（Staff Tabs）

AIM and GOAL

• Defect control of semiconductors not only leads to the creation of high-quality materials, but also to the discovery of new functions using defects. For example, the designed defects in diamond will enable new devices for applications such as quantum bits and quantum sensing.
• The Semiconductor Defect Design Group is focusing on wide bandgap semiconductor materials. We aim to realize technologies with high social value, such as applying room-temperature quantum technology, improving energy efficiency, and reducing environmental impact.

APPROACH

• Growth Process: Defect control involves many factors, including the growth process and material composition. We are working to create higher quality semiconductor materials by optimizing the growth process and controlling impurities densely.
• Defect characteristics: We gain knowledge for controlling defect formation by characterizing optical and electrical properties of defects. Aiming at quantum properties good to use, we incorporate methods of condensed matter theory and quantum optics, and construct an effective framework focusing on essentials of phenomena.

FIG １ Chemical vapor deposition system for growing high-purity diamond single crystals

FIG 2 Optically detected magnetic resonance (ODMR) system for characterizing quantum properties (red fluorescence light reflecting is emitted from diamond)

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