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Related Experiment Video

Updated: Apr 29, 2026

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces
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Superdirective dielectric nanoantennas.

Alexander E Krasnok1, Constantin R Simovski, Pavel A Belov

  • 1National Research University of Information Technologies, Mechanics and Optics, St Petersburg 197101, Russia. krasnokfiz@mail.ru.

Nanoscale
|May 28, 2014
PubMed
Summary
This summary is machine-generated.

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We developed a novel superdirective nanoantenna using silicon nanospheres. This dielectric design offers efficient radiation steering and high efficiency (up to 70%) with low losses, outperforming plasmonic alternatives.

Area of Science:

  • Nanophotonics
  • Metamaterials
  • Dielectric Nanoparticles

Background:

  • Superdirectivity in antennas is crucial for advanced applications.
  • Plasmonic nanoantennas often suffer from high losses.
  • Controlling nanoscale radiation requires novel designs.

Purpose of the Study:

  • To introduce a novel superdirective nanoantenna concept.
  • To investigate higher-order magnetic multipole moments in dielectric nanoparticles.
  • To demonstrate efficient radiation steering and high efficiency.

Main Methods:

  • Utilizing a silicon nanosphere with a notch as the nanoantenna.
  • Exciting the nanoantenna with a dipole source within the notch.
  • Comparing dielectric and plasmonic nanoantenna performance.

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Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation
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Related Experiment Videos

Last Updated: Apr 29, 2026

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces
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Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

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5.5K
Colloidal Synthesis of Nanopatch Antennas for Applications in Plasmonics and Nanophotonics
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Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation
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Main Results:

  • Achieved extraordinary directivity and efficient nanoscale radiation steering.
  • Demonstrated subwavelength sensitivity of beam direction to source position.
  • Observed high radiation efficiency (up to 70%) with significantly lower losses compared to plasmonic counterparts.

Conclusions:

  • Dielectric nanoantennas based on magnetic multipoles offer superior performance.
  • The proposed design overcomes limitations of plasmonic nanoantennas.
  • This technology enables efficient nanoscale beam steering and low-loss radiation.