Optical force mapping at the single-nanometre scale

Junsuke Yamanishi, Hidemasa Yamane, Yoshitaka Naitoh, Yan Jun Li, Nobuhiko Yokoshi, Tatsuya Kameyama, Seiya Koyama, Tsukasa Torimoto, Hajime Ishihara () and Yasuhiro Sugawara ()
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Junsuke Yamanishi: Osaka University
Hidemasa Yamane: Osaka Prefecture University
Yoshitaka Naitoh: Osaka University
Yan Jun Li: Osaka University
Nobuhiko Yokoshi: Osaka Prefecture University
Tatsuya Kameyama: Graduate School of Engineering, Nagoya University
Seiya Koyama: Graduate School of Engineering, Nagoya University
Tsukasa Torimoto: Graduate School of Engineering, Nagoya University
Hajime Ishihara: Osaka Prefecture University
Yasuhiro Sugawara: Osaka University

Nature Communications, 2021, vol. 12, issue 1, 1-7

Abstract: Abstract 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.

Date: 2021
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Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-24136-2

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DOI: 10.1038/s41467-021-24136-2

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