Revealing the near-field properties of coupled plasmonic systems by photoemission electron microscopy
| Project/Area Number |
26870014
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Physical chemistry
Nanostructural physics
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| Research Institution | Hokkaido University |
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Principal Investigator |
SUN QUAN 北海道大学, 創成研究機構, 特任助教 (90727463)
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| Project Period (FY) |
2014-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Keywords | Surface plasmon / Plasmon coupling / Near field / Dephasing time / PEEM / Plasmaon coupling / Dephasing |
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| Outline of Final Research Achievements |
We investigated the near-field properties of several coupled plasmonic systems using photoemission electron microscropy (PEEM). The PEEM measurements allow to obtain near-field mapping and spectral response of plasmonic nanostructures. With this technique we revealed near-field plasmon coupling in one dimensional gold nanochains and observed the energy transport along the nanochians. We also explored plasmon hybridization in gold dolmen nanostructures. Especially, the hybridized bonding and anti-bonding plasmon modes were explored in near field, and the dramatic evolution of near field intensity distribution between bonding and anti-bonding modes was observed. Furthermore, we established a time-resolved PEEM setup to investigate the dynamics of plasmon resonances, and we experimentally demonstrated for the first time that the quadrupole mode in Au nanoblocks has longer dephasing time than that of the dipole mode.
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Report
(3 results)
Research Products
(17 results)
