Presentation Information

1:30 PM - 1:45 PM JST(4:30 AM - 4:45 AM UTC)English Presentation

[23p-A310-2]Femtosecond optical vortex-induced flower-shaped surface relief in azo-polymer

〇Kana Ishihara¹, Katsuhiko Miyamoto^2,1, Takashige Omatsu^2,1 (1.Chiba Univ, 2.MCRC, Chiba Univ)

Keywords:

azopolymer,flower-shaped surface relief,optical vortex

We study two photon absorption (TPA) induced surface relief formation in azopolymers by illumination of femtosecond near-infrared optical vortex. We discover, for the first time, the optical vortex creates an unexpected flower-shaped surface relief with 4~8 petals along the azimuthal direction. This surface relief clears the modulation instability associated with the third-order nonlinear optical effect in azopolymers.

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