Picosecond optical vortex induced chiral structures of azo-polymers via two photon absorption

Ami Shiraishi; Keigo Masuda; Katsuhiko Miyamoto; Takashige Omatsu

doi:10.1117/12.2573511

15 June 2020 Picosecond optical vortex induced chiral structures of azo-polymers via two photon absorption

Ami Shiraishi, Keigo Masuda, Katsuhiko Miyamoto, Takashige Omatsu

Proceedings Volume 11522, Optical Manipulation and Structured Materials Conference 2020; 1152213 (2020) https://doi.org/10.1117/12.2573511
Event: SPIE Technologies and Applications of Structured Light, 2020, Yokohama, Japan

Abstract

We demonstrate the formation of chiral surface relief of azo-polymers by irradiation of picosecond 1-μm optical vortex with a pulse width of 8ps via two-photon absorption. Optical vortex induced TPA enables us to create the chiral surface structures only within an extremely narrow defocusing tolerance with high three-dimensional (longitudinal and transverse) spatial resolution beyond the diffraction limit and without undesired outer rings of Airy pattern.

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Ami Shiraishi, Keigo Masuda, Katsuhiko Miyamoto, and Takashige Omatsu "Picosecond optical vortex induced chiral structures of azo-polymers via two photon absorption", Proc. SPIE 11522, Optical Manipulation and Structured Materials Conference 2020, 1152213 (15 June 2020); https://doi.org/10.1117/12.2573511

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KEYWORDS

Optical vortices

Picosecond phenomena

Absorption

Diffraction

Spatial resolution

Optical storage

Spiral phase plates

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