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| ファイル | 記述 | サイズ | フォーマット | |
|---|---|---|---|---|
| 1.3194310.pdf | 1.06 MB | Adobe PDF | 見る/開く |
| タイトル: | Visible to near infrared conversion in Ce3+-Yb3+ Co-doped YAG ceramics |
| 著者: | Ueda, Jumpei   https://orcid.org/0000-0002-7013-9708 (unconfirmed)Tanabe, Setsuhisa  https://orcid.org/0000-0002-7620-0119 (unconfirmed) |
| 著者名の別形: | 上田, 純平 |
| 発行日: | 17-Aug-2009 |
| 出版者: | American Institute of Physics |
| 誌名: | Journal of Applied Physics |
| 巻: | 106 |
| 号: | 4 |
| 開始ページ: | 043101 |
| 抄録: | In Ce3+–Yb3+ co-doped Y3Al5O12 (YAG) ceramics, possibility of quantum cutting mechanism converting one visible photon into two NIR photons with optimum quantum efficiency approaching 200% have been investigated. In this material, Yb3+ emissions due to the 2F5/2-2F7/2 in the range of 1 μm were observed upon the excitation of 5d level of Ce3+. In addition, excitation spectra of Yb3+ emission corresponded to that of Ce3+ emission completely. Lifetime of the 5d level of Ce3+ decreased with increasing Yb3+ content. These results indicate the energy transfer (ET) from the 5d levels of Ce3+ to the 5F5/2 level of Yb3+. In (Y0.945Ce0.005Yb0.05) 3Al5O12 sample, the directly measured quantum yield (QY) of Yb3+ emission upon the excitation of 5d level of Ce3+ was about 12% and lower than QY (96%) that estimated from the ET efficiency which was calculated with the measured lifetime of Ce3+. |
| 著作権等: | Copyright c 2009, American Institute of Physics |
| URI: | http://hdl.handle.net/2433/150457 |
| DOI(出版社版): | 10.1063/1.3194310 |
| 関連リンク: | http://jap.aip.org/resource/1/japiau/v106/i4/p043101_s1 |
| 出現コレクション: | 学術雑誌掲載論文等 |
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