2012 Fiscal Year Final Research Report
Evaluation of energy migration between Er ions in the fluorescence process of ErYSiO silicate crystals.
| Project/Area Number |
22560003
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Applied materials science/Crystal engineering
|
|---|
| Research Institution | The University of Electro-Communications |
|---|
Principal Investigator |
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
ISSHIKI Hideo 電気通信大学, 大学院・情報理工学研究科, 教授 (60260212)
|
|---|
| Project Period (FY) |
2010 – 2012
|
| Keywords | シリコンフォトニクス / Erシリケート / 4f内殻遷移 / エネルギーマイグレーション / 協同アップコンバーション / 光学利得 / シリコン光増幅器 / シリコン発光素子 |
|---|
| Research Abstract |
Erbium silicate (Er2SiO5) having 1.6×1022/cm3 Er density is expected as a material for optical sources and optical amplifiers operated at 1.53цm in silicon photonics. Due to short Er-Er distances, however, the energy migration limits the luminescence efficiency. We changed the Er-Er distance by using ErxY2-xSiO5 crystals and evaluated the mechanisms and magnitudes of nonradiative transitions caused by energy migration. We found that nonradiative transitions due to energy migration were almost reduced at x～0.1 (Er～1×1021/cm3). We formed an optical waveguide of 500 цm length and obtained an optical gain of 30dB/cm.
|
