2022 Fiscal Year Final Research Report
Fabrication of optical device based on Pockels effect by amorphous material as precursor
| Project/Area Number |
21K18809
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| Research Category |
Grant-in-Aid for Challenging Research (Exploratory)
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| Allocation Type | Multi-year Fund |
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| Review Section |
Medium-sized Section 26:Materials engineering and related fields
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Project Period (FY) |
2021-07-09 – 2023-03-31
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| Keywords | アモルファス物質 / ポッケルス効果 / 光波制御素子 / 結晶化ガラス |
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| Outline of Final Research Achievements |
This project has aimed to develop a transparent polycrystalline material with optical function based on Pockels effect by the structural ordering in an amorphous oxide as precursor, i.e., crystallization. By use of the SrO-TiO2-SiO2 precursor, the fiber-type samples, in which nonlinear optical crystal Sr2TiSi2O8 radially crystallized, has successfully fabricated, and have been demonstrated to show the optical intensity modulation based on the phase shift by means of voltage application. Furthermore, a fiber-type sample has realized a low propagation loss comparable to current single-crystal optical waveguide in the optical communication wavelength region.
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| Free Research Field |
無機材料化学
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| Academic Significance and Societal Importance of the Research Achievements |
光波制御デバイスの作製には機能性の観点から単結晶材料がほぼ独壇場であるが，非晶質物質，特に酸化物ガラスは低コストで量産性に優れ，さらにはファイバー／薄膜など高い形態制御性を有することから，多くの実用上のメリットを有していると考えられる．本研究課題をさらに発展させることによって，特異な分極配向や組織構造を有する新しい光学材料の創出，ならびに光学デバイス応用へ大きな進展があるものと期待される．
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