- Address
- 305-0044 茨城県つくば市並木1-1 [アクセス]
研究内容
- Keywords
bulk single crystals,epitaxy, optoelectronic devices
出版物2004年以降のNIMS所属における研究成果や出版物を表示しています。
所属学会
日本結晶成長学会, 応用物理学会
電子・光機能材料研究センター
Crystals for optical isolators & high-brightness white light sources
UV-VIS-IR Faraday rotators, Single-crystal phosphors
概要
• Optical isolators are needed for laser machinery, marking, and high-power LDs. New novel Faraday rotators are demanded for higher laser powers and shorter wavelengths.
• Ceramic powder phosphors are used for white lighting by excitation with blue LEDs/LDs. All-inorganic efficient phosphors are needed for high-brightness applications.
新規性・独創性
• Improvement of Tb-garnets for IR Faraday rotators and development of new UV-visible Faraday rotators.
• Development of new binder-free yellow-green single-crystal phosphors with high conversion efficiency and high thermal stability to realize high-brightness white LEDs/LDs.
内容
• High optical quality fluoride and oxide single-crystals are grown by the Czochralski and Bridgman techniques.
• Grown crystals and oriented, cut, and polished for characterization in terms of crystalline quality and optical properties.
• Prototypes are fabricated to analyze the performance of actual devices and to get feedback for further development.
まとめ
• Tb-Sc-garnets are already incorporated into Yb-amplified fiber-lasers by Fujikura Ltd.
• CeF3 is implemented in commercial UV-VIS optical isolators.
• SCPs are already utilized in high-brightness light sources, and further expansion is foreseen in the next generations of projectors and headlights.