Flower shaped surface relief of azo-polymers created by illumination of ultrafast optical vortex laser

Ami Shiraishi; Keigo Masuda; Katsuhiko Miyamoto; Takashige Omatsu

doi:10.1117/12.2568317

20 August 2020 Flower shaped surface relief of azo-polymers created by illumination of ultrafast optical vortex laser

Ami Shiraishi, Keigo Masuda, Katsuhiko Miyamoto, Takashige Omatsu

Proceedings Volume 11477, Molecular and Nano Machines III; 1147705 (2020) https://doi.org/10.1117/12.2568317
Event: SPIE Organic Photonics + Electronics, 2020, Online Only

Abstract

We study two photon absorption (TPA) induced surface relief formation in an azo-polymer thin film by illumination of picosecond near-infrared optical vortex pulses with the corresponding intensity of >5 GW/cm2 at the focal plane. We discover, for the first time, that the optical vortex creates an unexpected flower-shaped surface relief with 3-8 petals along an azimuthal direction, corresponding to the topological charge of the incident optical vortex. This surface relief manifests the modulational instability associated with nonlinear light-matter interaction in the azo-polymer film.

Conference Presentation

Citation Download Citation

Ami Shiraishi, Keigo Masuda, Katsuhiko Miyamoto, and Takashige Omatsu "Flower shaped surface relief of azo-polymers created by illumination of ultrafast optical vortex laser", Proc. SPIE 11477, Molecular and Nano Machines III, 1147705 (20 August 2020); https://doi.org/10.1117/12.2568317

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