Resonant-Plasmon-Assisted Subwavelength Ablation by a Femtosecond Oscillator

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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.
Publisher
AMER PHYSICAL SOC
Issue Date
2018-02
Language
English
Article Type
Article
Keywords

SINGLE-MOLECULE FLUORESCENCE; HIGH-HARMONIC GENERATION; LASER-ABLATION; ELECTRON ACCELERATION; GOLD NANOPARTICLES; MASS-SPECTROMETRY; OPTICAL ANTENNAS; FIELD; TIP; METALS

Citation

PHYSICAL REVIEW APPLIED, v.9, no.2

ISSN
2331-7019
DOI
10.1103/PhysRevApplied.9.024001
URI
http://hdl.handle.net/10203/240374
Appears in Collection
ME-Journal Papers(저널논문)
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