| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Outline of Final Research Achievements |
Magneto-optical (MO) properties of non-magnetic metal nanoparticles were examined by magnetic circular dichroism (MCD) spectroscopy. (1) In Ag nanospheres, a derivative-like MCD signal was observed. The magnetoplasmonic oscillation with a lower frequency provided a stronger MO amplitude compared to that with a higher frequency giving asymmetric bisignated lineshapes. (2) MO activity was demonstrated in Au nanoparticles. We found an efficient method to separate the effects of intraband Drude and interband transitions in MCD spectra using an approximation that the optical response of the nanoparticle with a size for the disappearance of LSPR is dominated by interband transitions. (3) In Ag nanoprisms, a derivative-like MCD signal was observed at the energy of dipolar LSPR. In contrast, that for in-plane or out-of-plane quadrupolar LSPR showed a single peak that corresponds to the position of its extinction maximum, suggesting that MCD spectroscopy is effective for easy identification.
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