2019 Fiscal Year Research-status Report
Development of ultra-efficient terahertz devices by exploiting multiple exciton generation in single-walled carbon nanotubes
Project/Area Number |
19K15047
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Research Institution | Osaka University |
Principal Investigator |
BAGSICAN Filchit 大阪大学, レーザー科学研究所, 特任研究員 (20791982)
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Project Period (FY) |
2019-04-01 – 2021-03-31
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Keywords | carbon nanotubes / photoconductive antenna / terahertz emission / exciton dynamics / Boltzmann equation |
Outline of Annual Research Achievements |
We successfully incorporated carbon nanotubes in photoconductive antenna devices for terahertz (THz) emission measurements. We were able to obtain promising The THz emission efficiencies with our prototype devices. More importantly, we were able to combine THz emission measurements with other techniques and theoretical modelling to gain more understanding of the ultrafast response in carbon nanotubes.
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Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
We were able to achieve significant portion of our initial objectives for the project. However, more work is needed towards device optimization, mainly due to some difficulties in fabricating better carbon nanotube films using existing methods.
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Strategy for Future Research Activity |
Device optimization to develop efficient carbon nanotube-based THz devices will be tackled in the next fiscal year. Further work will be also done to understand the ultrafast dynamics in carbon nanotubes using THz emission techniques, which should give information useful for other optoelectronic applications as well.
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Causes of Carryover |
We had to reschedule some of the experiments due to equipment breakdown (femtosecond laser), as well as the COVID-19 pandemic in the later part of the previous fiscal year. Device optimization and other experiments related to carbon nanotubes (spectroscopy and THz detection), among others, will be done in the next fiscal year.
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[Presentation] Probing photocarrier dyamics in semiconducting carbon nanotubes by terahertz emission spectroscopy2019
Author(s)
Filchito Renee G. Bagsican, Iwao Kawayama, Michael Wais, Natsumi Komatsu, Kazunori Serita, Weilu Gao, Lincoln Weber, Marco Battiato, Hironaru Murakami, Frank A. Hegmann, Junichiro Kono and Masayoshi Tonouchi
Organizer
21st SPVM National Physics Conference, and 2019 Int’l. Conference on Advanced Functional Materials and Nanotechnology
Int'l Joint Research / Invited
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[Presentation] Terahertz Emission from a Photoconductive Antenna Switch Based on Aligned Single-Chirality Semiconducting Carbon Nanotubes2019
Author(s)
F.R. Bagsican, I. Kawayama, M. Wais, N. Komatsu, K. Serita, W. Gao, L. Weber, M. Battiato, H. Murakami, F.A. Hegmann, J. Kono, and M. Tonouchi
Organizer
The 21st International Conference on Electron Dynamics in Semiconductors, Optoelectronics and Nanostructures (EDISON21)
Int'l Joint Research
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[Presentation] Terahertz emission from photoconductive antenna switches based on highly-aligned and chirality-enriched semiconducting carbon nanotubes2019
Author(s)
F.R. Bagsican, I. Kawayama, M. Wais, N. Komatsu, K. Serita, W. Gao, L. Weber, M. Battiato, H. Murakami, F.A. Hegmann, J. Kono, and M. Tonouchi
Organizer
Optical Terahertz Science & Technology Conference (OTST)
Int'l Joint Research