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Plasmonics

, 6:767 | Cite as

Plasmonic Enhancement During Femtosecond Laser Drilling of Sub-wavelength Holes in Metals

  • Ergun SimsekEmail author
  • Selcuk Akturk
Article

Abstract

Precise ablation of metals using tightly focused femtosecond laser pulses with intensities close to the damage threshold can yield sub-wavelength, nanometer-sized holes or craters. These structures in metals can exhibit plasmonic effects, thereby affecting the interactions involved. We numerically simulate light propagation inside such holes and model the ablation process. We show that surface plasmon resonances can be excited at near-infrared and visible wavelengths. At resonance wavelengths, significant enhancement of aspect ratio is possible. Our results show that plasmonic effects are essential for the understanding of precision laser processing of metals, and they can be exploited to significantly enhance the performance of laser micro- and nano-machining.

Keywords

Laser ablation Micro- and nano-cavities Surface plasmons Plasmonic enhancement 

Notes

Acknowledgement

This work was supported by the Scientific and Technological Research Council of Turkey (TUBITAK, grant numbers 110T330 and 110E002).

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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  1. 1.Department of Electrical and Electronics EngineeringBahcesehir UniversityIstanbulTurkey
  2. 2.Department of PhysicsIstanbul Technical UniversityIstanbulTurkey

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