HOME > Profile > VILLORA, Garcia
- Address
- 305-0044 1-1 Namiki Tsukuba Ibaraki JAPAN [Access]
Research
- Keywords
bulk single crystals,epitaxy, optoelectronic devices
PublicationsNIMS affiliated publications since 2004.
Published patent applications
Society memberships
日本結晶成長学会, 応用物理学会
Research Center for Electronic and Optical Materials
Crystals for optical isolators & high-brightness white light sources
UV-VIS-IR Faraday rotators, Single-crystal phosphors
Overview
• 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.
Novelty and originality
• 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.
Details
• 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.
Summary
• 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.
