| Project/Area Number |
17K14670
|
|---|
| Research Category |
Grant-in-Aid for Young Scientists (B)
|
| Allocation Type | Multi-year Fund |
|---|
| Research Field |
Electron device/Electronic equipment
|
|---|
| Research Institution | NTT Basic Research Laboratories (2018)
Tokyo City University (2017) |
|---|
Principal Investigator |
Xu Xuejun 日本電信電話株式会社NTT物性科学基礎研究所, 量子光物性研究部, 主任研究員 (80593334)
|
|---|
| Research Collaborator |
Osako Rikito
|
|---|
| Project Period (FY) |
2017-04-01 – 2019-03-31
|
| Project Status |
Completed (Fiscal Year 2018)
|
| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2017: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
|
|---|
| Keywords | Mid-infrared photonics / Silicon photonics / Gas sensing / Germanium / Microresonator / Optical resonators / Mid-infrared / Waveguide / Grating coupler / 光デバイス / ゲルマニウム / 中赤外 / ガスセンシング |
|---|
| Outline of Final Research Achievements |
In this research, silicon-based mid-infrared (MIR) photonic platform has been developed for ultra-sensitive on-chip gas sensing. Ge-on-Si films with ultralow MIR absorption of less than 10 cm-1 have been grown by molecular beam epitaxy and post annealing. Fundamental building blocks, including optical waveguides, fiber-to-waveguide grating couplers, and microdisk resonators, have been realized on Ge-on-Si and silicon-on-insulator substrates. A MIR waveguide transmission measurement system has been established and high coupling efficiency over 10% between fiber and waveguide has been realized. Based on these device components, sensitivity analysis indicates that ultra-long effective optical absorption length on the order of meter can be readily achieved on-chip within device footprint of less than 0.04 mm2.
|
| Academic Significance and Societal Importance of the Research Achievements |
The research indicates that the proposed MIR photonic platform is very promising for high sensitivity on-chip trace gas sensing, and represents a new direction for group-IV photonics. It thus pave the way to low-cost, practical, portable, and smart gas monitoring tools in industry and daily life.
|
