Size and shape dependent few-cycle near-field dynamics of bowtie nanoantennas

Research output: Contribution to journalArticle

Abstract

Metal nanostructures can transfer electromagnetic energy from femtosecond laser pulses to the near-field down to spatial scales well below the optical diffraction limit. By combining few-femtosecond laser pulses with photoemission electron microscopy, we study the dynamics of the induced few-cycle near-field in individual bowtie nanoantennas. We investigate how the dynamics depend on antenna size and exact bowtie shape resulting from fabrication. Different dynamics are, as expected, measured for antennas of different sizes. However, we also detect comparable dynamics differences between individual antennas of similar size. With Finite-difference time-domain simulations we show that these dynamics differences between similarly sized antennas can be due to small lateral shape variations generally induced during the fabrication.

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Subject classification (UKÄ) – MANDATORY

  • Atom and Molecular Physics and Optics
Original languageEnglish
Pages (from-to)31460-31471
JournalOptics Express
Volume23
Issue number24
Publication statusPublished - 2015
Publication categoryResearch
Peer-reviewedYes

Related research output

Lorek, E., 2016, 97 p.

Research output: ThesisDoctoral Thesis (compilation)

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