Nanoscopic visualization of chiro-optical field in photoinduced force microscopy

Junsuke Yamanishi; Hyo-yong Ahn; Hiromi Okamoto

doi:10.1117/12.3008343

20 September 2023 Nanoscopic visualization of chiro-optical field in photoinduced force microscopy

Junsuke Yamanishi, Hyo-yong Ahn, Hiromi Okamoto

Proceedings Volume 12606, Optical Manipulation and Structured Materials Conference; 126060P (2023) https://doi.org/10.1117/12.3008343
Event: Optics and Photonics International Congress, 2023, Yokohama, Japan

Abstract

Nanoscopic observation of chiro-optical phenomena is an intriguing scientific topic but have large difficulties in the measurements, and hence the physics is still largely unexplored. So far, the chiro-optical physics have not been well unveiled; conventionally, those phenomena have been investigated only through indirect information from the macroscopic far-field optical measurements and/or predictions by theoretical simulations. To fully understand and to utilize the full potential of chiro-optical systems, the local in-situ observation of the effects from individual components is essential, as the macroscopic chiro-optical effect is not straightforward for the analysis of the microscopic phenomena. In the present study, we attempted the imaging of the chiro-optical forces confined in the nanospaces based on a photoinduced force microscopy. On the right-handed gammadion structure, the strong optical gradient force appeared at the edges of the structure under illumination of LCP light at 785 nm. The left-handed gammadion gave the similar result under RCP illumination. This research paves the way for clarifying the physics of nanoscale chiro-optics and application of that.

Citation Download Citation

Junsuke Yamanishi, Hyo-yong Ahn, and Hiromi Okamoto "Nanoscopic visualization of chiro-optical field in photoinduced force microscopy", Proc. SPIE 12606, Optical Manipulation and Structured Materials Conference, 126060P (20 September 2023); https://doi.org/10.1117/12.3008343

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KEYWORDS

Microscopy

Light sources and illumination

Physics

Visualization

Nanostructures

Biological imaging

Circular dichroism spectroscopy

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