2019 Fiscal Year Research-status Report
Acute nose-on-a-chip based on mid-infrared graphene-on-silicon hybrid photonic-plasmonic waveguides
| Project/Area Number |
18K13798
|
|---|
| Research Institution | The University of Tokyo |
|---|
Principal Investigator |
CHENG Zhenzhou 東京大学, 大学院理学系研究科(理学部), 客員共同研究員 (50772092)
|
|---|
| Project Period (FY) |
2018-04-01 – 2021-03-31
|
| Keywords | optical gas sensors / silicon photonics / graphene |
|---|
| Outline of Annual Research Achievements |
Based on our previous demonstrated chip-integrated mid-infrared high-Q resonator, in this fiscal year, I further studied a method to characterize gas mid-infrared microring resonator with a monochromatic laser for sensing applications. The method is expected to overcome the limitation of bulk and complex instruments for measuring mid-infrared microring resonators, furthermore paves the way for studying monochromatically chip-integrated cavities and their applications. The work is published in Journal of the Optical Society of America B. Also I designed an on-chip waveguide-edge integrated polarizer and a spatial mode filter based on graphene-on-silicon waveguides. These studies could help improve on-chip gas sensing systems and bring us more degrees of freedom to design on-chip gas sensors by optimizing polarization states and spatial mode distribution in waveguides. These studies have been published in Applied Physics Express and Optics Express, respectively. Moreover, under the support of the project, I carried out biomolecular sensing by using Raman spectroscopy. My labmates and I together developed a novel material for enhancing Raman signal and demonstrated some applications in chemical and protein sensing. This work is currently reviewed by Nature Photonics. Based on the above results, I have given three invited talks and presented one oral speech at international conferences.
|
| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
In Phase II of the project, I have developed a new method to characterize mid-infrared photonic devices and designed some on-chip passive photonic devices for sensing applications. Now I am working on the development of the gas sensing setup which could be used for testing on-chip photonic devices under various gas environments. The design of the whole setup has been finished and some instruments are under fabrication. The budget is enough for my experiments.
|
| Strategy for Future Research Activity |
In Phase III of the project, I am planning to carry out my study in two aspects:
1.Work on the graphene-on-silicon photonic-plasmonic hybrid integrated circuits. I plan to fabricate the designed graphene-on-silicon photonic-plasmonic hybrid integrated circuits. Localized surface plasmonic resonance in graphene nanoribbons integrated on the silicon waveguides can be excited and measured via the in-plane configuration.
2.Work on gas sensing study. After finishing the experimental setup and graphene-on-silicon devices, I plan to carry out an on-chip optical gas sensing study and explore possible new mechanisms in graphene-silicon photonic-plasmonic hybrid sensors.
|
