- 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。
論文
- Théodore Remark, Patricia Segonds, Jérôme Debray, David Jegouso, Encarnación G. Víllora, Kiyoshi Shimamura, Benoît Boulanger. Linear and nonlinear optical properties of the langasite crystal Ca3TaAl3Si2O14. Optical Materials Express. 13 [7] (2023) 2053 10.1364/ome.496056 Open Access
- Michail Xygkis, Encarnación G. Víllora, George E. Katsoprinakis, Kiyoshi Shimamura, T. Peter Rakitzis. Bulk and surface-scattering loss measurements of CeF3 crystals at 532 nm via cavity ring down spectroscopy. Optical Materials. 169 (2026) 117620 10.1016/j.optmat.2025.117620 Open Access
- Peng Liu, Dongsheng Yuan, Chao Dong, Gaoting Lin, Encarnación G. Víllora, Ji Qi, Xinguo Zhao, Kiyoshi Shimamura, Jie Ma, Junfeng Wang, Zhidong Zhang, Bing Li. Ultralow-field magnetocaloric materials for compact magnetic refrigeration. NPG Asia Materials. 15 [1] (2023) 41 10.1038/s41427-023-00488-7 Open Access
書籍
- Richard Dronskowski, Shinichi Kikkawa, Andreas Stein. Handbook of Solid State Chemistry. Handbook of Solid State Chemistry (Wiley). Wiley-VCH Verlag GmbH & Co. KGaA, 2017, 429-466. 10.1002/9783527691036
- 島村 清史, ビジョラ ガルシア, 猪股 大介, 飯塚 和幸. 高輝度白色照明用の単結晶蛍光体. 次世代蛍光体材料の開発. , 2016, 133-141.
- 島村 清史, ビジョラ ガルシア. 光学結晶とバンドギャップ. バンドギャップエンジニアリング－次世代高効率デバイスへの挑戦－. , 2011, 168-177.
会議録
- VILLORA, Garcia. Single-crystal phosphors for high-brightness lighting. SPIE News Room ホームページでのビデオ掲載. (2016) 99999
- Encarnación G. Víllora, Stelian Arjoca, Daisuke Inomata, Kiyoshi Shimamura. Single Crystal phosphors for high-brightness white LEDs/LDs. Proc. of SPIE . (2016) 10.1117/12.2212233
- Encarnación G. Víllora, Stelian Arjoca, Kiyoshi Shimamura, Daisuke Inomata, Kazuo Aoki. β-Ga2O3 and single-crystal phosphors for high-brightness white LEDs & LDs,and β-Ga2O3 potential for next generation of power devices. Proc. of SPIE, Oxide-based Materials and Devices V. (2014) 10.1117/12.2039305
口頭発表
- VILLORA, Garcia. Single Crystal phosphors for high-brightness white LEDs/LDs. SPIE Photonics West2016. 2016 招待講演
- VILLORA, Garcia. β-Ga2O3 and single-crystal phosphors for high-brightness white LEDs & LDs,and β-Ga2O3 potential for next generation of power devices. SPIE Photonics West. 2014 招待講演
- ZHOU, Yueshen, YUAN, Dongsheng, VILLORA, Garcia, Nakauchi Daisuke, Kato Takumi, Kawaguchi Noriaki, Yanagida Takayuki, SHIMAMURA, Kiyoshi. High-density Y1-xTbxTaO4 Single Crystal for X-ray Scintillation. 2025年度日本材料科学会学術講演大会. 2025
その他の文献
- 島村 清史, ビジョラ ガルシア, 船木 秋晴. レーザー加工機用の優れたファラデー回転子の開発と実用化. SAT Science Academy of Tsukuba. (2020) 5
- 島村 清史, ビジョラ ガルシア, 猪股 大介, 伊藤 彰, 船木 秋晴. レーザー加工機用ファラデー回転子と高輝度白色光源用単結晶蛍光体の開発. RARE EARTHS. (2018) 25-30
- 島村 清史, ビジョラ ガルシア. 新しい光学単結晶材料の開発を目指して. 光技術コンタクト. (2021) 38-43
公開特許出願
- 酸化物結晶、その製造方法、および、その用途 (2026)
- 酸化物結晶、その製造方法、それを用いたシンチレータ材料、および、その用途 (2026)
- 酸化物結晶、その製造方法、および、その用途 (2026)
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.
