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Progressive Self-Boosting Anapole-Enhanced Deep-Ultraviolet Third Harmonic during Few-Cycle Laser Radiation

  • Liping Shi*
  • , Andrey B. Evlyukhin*
  • , Carsten Reinhardt
  • , Ihar Babushkin
  • , Vladimir A. Zenin
  • , Sven Burger
  • , Radu Malureanu
  • , Boris N. Chichkov
  • , Uwe Morgner
  • , Milutin Kovacev
  • *Corresponding author for this work
  • Leibniz University Hannover
  • University of Southern Denmark
  • Zuse Institute Berlin
  • City University of Applied Sciences

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

Nanoantennas made of high-index semiconductors with a strong nonlinearity and supported optical Mie-type resonances offer a promising alternative platform for nonlinear nanophotonics. In this Letter, we employ an array of amorphous silicon nanodisks with varying diameters to produce a broadband deep-ultraviolet third harmonic of a few-cycle Ti:sapphire oscillator. Ultrashort light pulses efficiently deposit their energy at the center of the disks where the electric field is strongly amplified by the anapole states. This leads to a progressive material modification in an extreme multishot (>1010 pulses) and a rather low fluence (
Original languageEnglish
JournalACS Photonics
Volume7
Issue number7
Pages (from-to)1655-1661
ISSN2330-4022
DOIs
Publication statusPublished - 2020

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