Low power femtosecond tip-based nanofabrication with advanced control

Jiangbo Liu, Zhixiong Guo, Qingze Zou

Research output: Contribution to journalArticle

Abstract

In this paper, we propose an approach to enable the use of low power femtosecond laser in tip-based nanofabrication (TBN) without thermal damage. One major challenge in laser-assisted TBN is in maintaining precision control of the tip–surface positioning throughout the fabrication process. An advanced iterative learning control technique is exploited to overcome this challenge in achieving high-quality patterning of arbitrary shape on a metal surface. The experimental results are analyzed to understand the ablation mechanism involved. Specifically, the near-field radiation enhancement is examined via the surface-enhanced Raman scattering effect, and it was revealed the near-field enhanced plasma-mediated ablation. Moreover, silicon nitride tip is utilized to alleviate the adverse thermal damage. Experiment results including line patterns fabricated under different writing speeds and an “R” pattern are presented. The fabrication quality with regard to the line width, depth, and uniformity is characterized to demonstrate the efficacy of the proposed approach.

Original languageEnglish (US)
Article number23
JournalApplied Physics B: Lasers and Optics
Volume124
Issue number2
DOIs
StatePublished - Feb 1 2018

Fingerprint

nanofabrication
ablation
near fields
damage
fabrication
silicon nitrides
learning
positioning
metal surfaces
lasers
Raman spectra
augmentation
radiation

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)

Cite this

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abstract = "In this paper, we propose an approach to enable the use of low power femtosecond laser in tip-based nanofabrication (TBN) without thermal damage. One major challenge in laser-assisted TBN is in maintaining precision control of the tip–surface positioning throughout the fabrication process. An advanced iterative learning control technique is exploited to overcome this challenge in achieving high-quality patterning of arbitrary shape on a metal surface. The experimental results are analyzed to understand the ablation mechanism involved. Specifically, the near-field radiation enhancement is examined via the surface-enhanced Raman scattering effect, and it was revealed the near-field enhanced plasma-mediated ablation. Moreover, silicon nitride tip is utilized to alleviate the adverse thermal damage. Experiment results including line patterns fabricated under different writing speeds and an “R” pattern are presented. The fabrication quality with regard to the line width, depth, and uniformity is characterized to demonstrate the efficacy of the proposed approach.",
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Low power femtosecond tip-based nanofabrication with advanced control. / Liu, Jiangbo; Guo, Zhixiong; Zou, Qingze.

In: Applied Physics B: Lasers and Optics, Vol. 124, No. 2, 23, 01.02.2018.

Research output: Contribution to journalArticle

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