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Photoinduced force microscopy imaging using heterodyne-FM technique
Author(s): Junsuke Yamanishi; Masaaki Tsujii; Yoshitaka Naitoh; Yanjun Li; Yasuhiro Sugawara
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Paper Abstract

In photoinduced force microscopy (PiFM), amplitude modulation techniques, such as direct mode, and heterodyne amplitude modulation techniques have been used to detect the photoinduced force. These amplitude modulation techniques are affected by other forces because the resonance frequency of a cantilever shifts and non-conservative force damp the cantilever motion. Here, we investigate and propose the heterodyne frequency modulation technique (heterodyne-FM) for reduction of the influence of the other forces and photothermal force. Heterodyne-FM PiFM enabled the acquisition of PiFM images and force spectra without those artifacts. Using the heterodyne-FM technique, we succeed to visualize and evaluate photoinduced force between a tip and a quantum dot on gold surface.

Paper Details

Date Published: 24 April 2018
PDF: 2 pages
Proc. SPIE 10712, Optical Manipulation Conference, 1071218 (24 April 2018); doi: 10.1117/12.2319314
Show Author Affiliations
Junsuke Yamanishi, Osaka Univ. (Japan)
Masaaki Tsujii, Osaka Univ. (Japan)
Yoshitaka Naitoh, Osaka Univ. (Japan)
Yanjun Li, Osaka Univ. (Japan)
Yasuhiro Sugawara, Osaka Univ. (Japan)

Published in SPIE Proceedings Vol. 10712:
Optical Manipulation Conference
Takashige Omatsu; Hajime Ishihara; Keiji Sasaki, Editor(s)

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