抄録
Near-field optical microscopy visualizes spatial characteristics of elementary excitations induced in metal nanostructures. However, the microscopy is not able to reveal the absorption and scattering characteristics of the object simultaneously. In this study, we demonstrate a method for revealing the absorption and scattering characteristics of silver nanoplate by using near-field transmission and reflection spectroscopy. Near-field transmission and reflection images show characteristic spatial features attributable to the excited plasmon modes. The near-field refection image near the resonance shows a reversed contrast depending on the observed wavelength. Near-field reflection spectra show unique positive and negative resonant features. We reveal that the optical characteristics and the wavelength dependency of the optical contrast originate from the scattering and absorption properties of the plasmons, with the aid of the electromagnetic simulations.
本文言語 | English |
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論文番号 | 144703 |
ジャーナル | Journal of Chemical Physics |
巻 | 153 |
号 | 14 |
DOI | |
出版ステータス | Published - 2020 10月 14 |
ASJC Scopus subject areas
- 物理学および天文学(全般)
- 物理化学および理論化学