長距離伝搬ブロッホ表面波ナノレーザーによる高感度・高スループットバイオセンシング

2020 Fiscal Year Annual Research Report

• Project/Area Number: 20F40045
• Research Institution: The University of Tokyo
• Principal Investigator: J・J Delaunay 東京大学, 大学院工学系研究科(工学部), 准教授 (80376516)
• Co-Investigator(Kenkyū-buntansha): LEE YANG-CHUN 東京大学, 工学(系)研究科(研究院), 外国人特別研究員
• Project Period (FY): 2020-11-13 – 2022-03-31
• Keywords: surface wave / sensing / Bloch surface wave

Outline of Annual Research Achievements

The Bloch surface wave platform was optimized by simulation. The guiding slabs used to guide the surface wave were optimized, and a guided surface-wave optical circuit comprising a light source, sensor, and detection scheme was designed and analyzed by simulation.
The optical setup used in the analysis of the performance of the surface wave platform was prepared. The setup provides for light injection into the guided surface-wave circuit, light collection, and spectral analysis.
Fabrication of the device was realized by lithography followed by patterning steps for the perovskite materials, which is used as the gain materials of the integrated light source. The light emission of the designed light source was analyzed for the first time.

Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

The optimization of the structures, the analysis setup and the fabrication process have been established.

Strategy for Future Research Activity

The optimization of the lasing structure is the main objective of the next year. The perovskite materials, used as the gain material, is prepared using an all-solution synthesis method. The fabrication process of the perovskite structures relies on lithographic patterning steps such as such electron-beam lithography or laser lithography and optimization of the size and concentration of perovskite nanocrystals. Particularly the density of the perovskite gain material is optimized to achieve lasing. Regarding the sensing scheme, the stability of the perovskite structure and the effect of the surrounding environment are investigated with the help of a vacuum chamber installed under the microscope system which developed the first year.