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Resonant-Plasmon-Assisted Subwavelength Ablation by a Femtosecond Oscillator

Abstract : We experimentally demonstrate the use of subwavelength optical nanoantennas to assist a direct nanoscale ablation using the ultralow fluence of a Ti:sapphire oscillator through the excitation of surface plasmon waves. The mechanism is attributed to nonthermal transient unbonding and electrostatic ablation, which is triggered by the surface plasmon-enhanced field electron emission and acceleration in vacuum. We show that the electron-driven ablation appears for both nanoscale metallic as well as dielectric materials. While the observed surface plasmon-enhanced local ablation may limit the applications of nanostructured surfaces in extreme nonlinear nanophotonics, it, nevertheless, also provides a method for nanomachining, manipulation, and modification of nanoscale materials. Collateral thermal damage to the antenna structure can be suitably avoided, and nonlinear conversion processes can be stabilized by a dielectric overcoating of the antenna.
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Contributor : Caroline Lebe Connect in order to contact the contributor
Submitted on : Tuesday, February 20, 2018 - 2:15:11 PM
Last modification on : Tuesday, January 4, 2022 - 4:45:46 AM

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Liping Shi, Bianca Iwan, Quentin Ripault, José R. c. Andrade, Seunghwoi Han, et al.. Resonant-Plasmon-Assisted Subwavelength Ablation by a Femtosecond Oscillator. Physical Review Applied, American Physical Society, 2018, 9 (2), ⟨10.1103/PhysRevApplied.9.024001⟩. ⟨cea-01713307⟩



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