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Applied Physics B

, Volume 103, Issue 1, pp 51–55 | Cite as

Near-field local enhancement by ordered arrays of sub-wavelength scattering centers fabricated by femtosecond ablation

  • J. Barrio
  • J. Lamela
  • A. Ródenas
  • G. Zhou
  • G. Lifante
  • F. Jaque
  • D. Jaque
  • M. Gu
Article

Abstract

We show how the ultrafast laser inscription of nanodimple arrays enables near-field local enhancement in high refractive-index crystals. We first demonstrate both experimentally and numerically how, when two nanodimples are separated by intermediate distances (700–1000 nm), near-field interference can take place resulting in a near-field enhancement between nanodimples. Based on this effect, near-field enhancements close to 60% are then demonstrated at the center of nanodimple arrays, and strong optical contrasts in excess of 100% are produced. The integration of these arrays into crystal substrates provides a versatile tool for new optical trapping and evanescent-field nanosensing devices.

Keywords

Femtosecond Laser Separation Distance Lithium Niobate Local Enhancement Dope Lithium Niobate 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  • J. Barrio
    • 1
  • J. Lamela
    • 1
  • A. Ródenas
    • 1
  • G. Zhou
    • 2
  • G. Lifante
    • 1
  • F. Jaque
    • 1
  • D. Jaque
    • 1
  • M. Gu
    • 3
  1. 1.Dept. de Física de MaterialesUniversidad Autónoma de MadridMadridSpain
  2. 2.School of PhysicsShandong UniversityJinanPeople’s Republic of China
  3. 3.Centre for Micro-Photonics and Centre for Ultrahigh-Bandwidth Devices for Optical SystemsFaculty of Engineering and Industrial SciencesHawthornAustralia

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