2021 Fiscal Year Final Research Report

Development of rare-earth oxide based optical amplifiers and lasers integrated on Si by using magnetic light-matter interactions

Research Project

PDF

Project/Area Number	19H02207
Research Category	Grant-in-Aid for Scientific Research (B)
Allocation Type	Single-year Grants
Section	一般
Review Section	Basic Section 21060:Electron device and electronic equipment-related
Research Institution	NTT Basic Research Laboratories
Principal Investigator	Xu Xuejun 日本電信電話株式会社NTT物性科学基礎研究所, フロンティア機能物性研究部, 主任研究員 (80593334)
Co-Investigator(Kenkyū-buntansha)	後藤秀樹日本電信電話株式会社NTT物性科学基礎研究所, 企画, 所長 (10393795) 俵毅彦日本大学, 工学部, 教授 (40393798) 尾身博雄大和大学, 理工学部, 教授 (50257218) 澤野憲太郎東京都市大学, 理工学部, 教授 (90409376) 稲葉智宏日本電信電話株式会社NTT物性科学基礎研究所, フロンティア機能物性研究部, 研究員 (90839119)
Project Period (FY)	2019-04-01 – 2022-03-31
Keywords	希土類イオン / 光増幅器 / レーザー / シリコンフォトニクス / 光導波路 / ナノ共振器
Outline of Final Research Achievements	High quality single-crystal rare-earth oxide thin films (Gd2O3 and (ErGd)2O3) have been successfully grown on silicon-on-insulator substrate by using molecular beam epitaxy method. For realization optical amplifiers, a waveguide platform with low loss (2.3 dB/cm) and large optical confinement factor (~42%) has been demonstrated. Through pump-probe measurement, optical signal enhancement up to 24 dB/cm has been obtained in the waveguide and material transparency has been achieved. Microring resonators with high Q-factors have also been demonstrated for realizing lasers. High Q-factor metasurface structures have also been designed for investigation and manipulation of light emission of electric dipole and magnetic dipole transitions of Er3+ ions. Finally, the demonstrated waveguides and resonators have also found to be a promising platform for integrated quantum optical devices.
Free Research Field	応用物理工学
Academic Significance and Societal Importance of the Research Achievements	シリコン上にモノリシック集積可能な光増幅器とレーザーはシリコンフォトニクスにおいて最も重要かつ実現されてない要素デバイスである。本研究で実証された酸化希土類薄膜材料及びデバイス構造では、これらのデバイスの実現に非常に有望なプラットフォームと言え、モノリシック光集積回路技術に活用できると期待される。