Summary of Research Project Results under JSPS FY2001 "Research for the Future Program"

The objective of research project is to explore materials and structures for highly functional photonic integrated circuits. We developed a new class of selective area growth in metal-organic vapor phase epitaxy as a break-through technology for realizing semiconductor monolithic photonic integrated circuits, and demonstrated photonic functional devices that have otherwise been difficult to make, such as wavelength converters, optical isolators, and all optical switches. In order to realize the nonreciprocal function, it is requested to implement magneto-optic materials. We developed a novel technology of low-temperature wafer bonding in order to integrate magneto-optic garnets on III-V semiconductor wafers, and demonstrated the performance of novel isolator that has high compatibility of integrating with semiconductor optical active devices. Electrooptic effect and nonlinear optical effect are essentially very useful in advanced optoelectronics. However, their practical applications are unfortunately limited by their poor electrooptic or nonlinear optical constants. We spotlight LiNbO₃ crystal families to obtain guiding principles enlarging these effects, and obtained 1.3 times higher electrooptic effect in a stoichiometric LiNbO₃ doped with Ce ions. As for scalability of integrated photonic circuits, it is limited by the size of devices and relatively large curvature of waveguides used for connecting photonic devices. The fourth group totally studied to investigate materials and structures for a large scale photonic integration composed of ultra-small elements. The fundamental structure is a semiconductor slab sandwiched by low refractive index media so-called microdisk. We developed various techniques to fabricate and design GaInAsP/InP-based microdisk lasers as well as Si-based photonic waveguides and successfully demonstrated the evidences of these devices with high performance and characteristic.

1.Research Institution		Tokyo Institute of Technology

2.Research Area		Physical and Engineering Sciences

3.Research Field		Exploratory Research on Novel Artificial Materials and Substances for Next-Generation Industries

4.Term of Project		FY 1997 ～ FY 2001

5.Project Number		97P00103

6.Title of Project		Functional Materials and Structures for Photonic Integrated Circuits

Name	Institution,Department	Title of Position
Tetsuya Mizumoto	Tokyo Institute of Technology, Graduate School of Science and Engineering	Associate Professor

Names	Institution,Department	Title of Position
Yoshiaki Nakano	The University of Tokyo, Graduate School of Engineering	Professor
Toshihiko Baba	Yokohama National University, Graduate School of Engineering	Associate Professor
Hirochika Nakajima	Waseda University, School of Science and Engineering	Professor

Summary of Research Project Results under JSPS FY2001"Research for the Future Program"

Summary of Research Project Results under JSPS FY2001
"Research for the Future Program"