2020 Fiscal Year Research-status Report
Fabrication and characterization of a single-VO2-nanoparticle electronic nano-switch device
| Project/Area Number |
20K15145
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| Research Institution | Hokkaido University |
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Principal Investigator |
Pin Christophe 北海道大学, 電子科学研究所, 助教 (50793767)
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| Project Period (FY) |
2020-04-01 – 2023-03-31
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| Keywords | electronic nano-switch / Mott transition / vanadium dioxide / nanoparticle deposition |
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| Outline of Annual Research Achievements |
Gold nanostructures have been designed using COMSOL Multiphysics to enable nanoparticle optical trapping and thermal control of the trapped nanoparticle. Plasmonic nanoantennas with tailored scattering properties have been designed to enable the detection of optically trapped nanoparticles that do not emit light. The fabrication process based on electron-beam lithography has been optimized after the installation of a new gold sputtering equipment. As a first step, successful nanoparticle deposition experiments have been conducted using fluorescent nanodiamonds. Experiments are ongoing to validate this deposition process in the case of VO2 nanoparticles. Research related to a new fabrication method of VO2 nanomaterials has been started.
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| Current Status of Research Progress |
Current Status of Research Progress
3: Progress in research has been slightly delayed.
Reason
Due to the global pandemic of covid19 and the lab management duties, the experimental work has been slightly delayed, but it is ongoing now and results should be obtained during this new fiscal year. Numerical simulations have been conducted according to the initial plan and some related results have already been published and presented in an international conference.
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| Strategy for Future Research Activity |
The design and the fabrication of gold nanostructures will be continued. Experiments for the trapping and deposition of VO2 nanoparticles will be continued. Another fabrication method of VO2 nanomaterials will be also investigated for comparison. The temperature of the VO2 nanoparticle will be controlled by laser-induced heating of the plasmonic nanoantenna. Resistivity measurements will be done using an electrical characterization system. A femtosecond pulsed laser source will be used for ultrafast optical control experiments. Electrically triggered phase transition will be controlled by applying a voltage bias to the gold nanoelectrodes. The properties of the nano-switch will be evaluated by recording and analyzing the spike signal generation at constant current.
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| Causes of Carryover |
During this new financial year, electrical characterization tools and other miscellaneous expendables will be purchased. Some amount of the budget will cover fees for the usage of the clean room and scanning electron microscope facilities. Software license fees, article publication fees and conference registration fees will be also covered.
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