| Autor: |
Yamanishi, Junsuke, Yamane, Hidemasa, Naitoh, Yoshitaka, Li, Yan Jun, Yokoshi, Nobuhiko, Kameyama, Tatsuya, Koyama, Seiya, Torimoto, Tsukasa, Ishihara, Hajime, Sugawara, Yasuhiro |
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| Zdroj: |
Nature Communications; 6/23/2021, Vol. 12 Issue 1, p1-7, 7p |
| Abstrakt: |
Three-dimensional (3D) information of the optical response in the nanometre scale is important in the field of nanophotonics science. Using photoinduced force microscopy (PiFM), we can visualize the nano-scale optical field using the optical gradient force between the tip and sample. Here, we demonstrate 3D photoinduced force field visualization around a quantum dot in the single-nanometre spatial resolution with heterodyne frequency modulation technique, using which, the effect of the photothermal expansion of the tip and sample in the ultra-high vacuum condition can be avoided. The obtained 3D mapping shows the spatially localized photoinduced interaction potential and force field vectors in the single nano-scale for composite quantum dots with photocatalytic activity. Furthermore, the spatial resolution of PiFM imaging achieved is ~0.7 nm. The single-nanometer scale photoinduced field visualization is crucial for applications such as photo catalysts, optical functional devices, and optical manipulation. Direct visualisation of 3D vector distributions of photoinduced fields can shed light on the optical and mechanical behaviour of different materials. Here, the authors demonstrate such visualisation using photoinduced force microscopy by observing the optical gradient force at the nanometer scale. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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