The 82nd JSAP Autumn Meeting 2021

Presentation information

Oral presentation

3 Optics and Photonics » 3.7 Laser processing

[11a-N321-1~11] 3.7 Laser processing

Sat. Sep 11, 2021 9:00 AM - 12:00 PM N321 (Oral)

Mizue Mizoshiri(Nagaoka Univ. of Tech.)

9:00 AM - 9:15 AM

[11a-N321-1] Controlling plasmonic nanoablation on Si induced with double-pulse femtosecond laser

Yuto Iida1, Mika Tateda1, Godai Miyaji1 (1.Tokyo Univ. of Agriculture and Technology)

Keywords:femtosecond laser material processing, surface plasmon polariton, silicon

We have observed that a delayed femtosecond (fs) laser pulse can excite plasmonic near-fields on a Si grating transiently metallized with an intense fs laser pulse, and the plasmonic near-fields induce nm-size ablation. The experimental results obtained clearly show that an ablation depth can be controlled with a time delay, and that an weak-fluence fs pulse below the ablation threshold can induce the strong ablation of surfaces through ablation with the plasmonic near-fields.