ACS Photonics
ACS Photonics
5 years ago

Third Harmonic Generation Enhanced by Multipolar Interference in Complementary Silicon Metasurfaces

Third Harmonic Generation Enhanced by Multipolar Interference in Complementary Silicon Metasurfaces
Shumei Chen, Shuang Zhang, Guixin Li, King Fai Li, Thomas Zentgraf, Andrey Miroshnichenko, Dragomir Neshev, Mohsen Rahmani
Nonlinear harmonic generation in metasurfaces has shown great promise for applications such as novel light sources, nonlinear holography, and nonlinear imaging. In particular, dielectric metasurfaces have shown multifold enhancement of the harmonic efficiency in comparison to their plasmonic counterparts due to lower optical loss and much higher damage threshold. In this work, we propose to enhance the efficiency of the third harmonic generation in a complementary silicon nonlinear metasurface, consisting of nanoapertures of cross-like shape in the silicon film. The efficiency enhancement is based on a multipolar interference between the magnetic dipole and electric quadrupole, resulting in significant near-field enhancement and a large mode volume of the nonlinear interaction. The measured efficiency of third harmonic generation from the silicon metasurface is 100× higher than that from a planar silicon film of the same thickness. Numerical analysis of the near-field resonant modes confirms the multipolar mechanism of nonlinear enhancement. Enhanced third harmonic generation by multipolar interference in complementary dielectric nanostructure opens a new route for developing high-efficiency nonlinear metasurfaces.

Publisher URL: http://dx.doi.org/10.1021/acsphotonics.7b01423

DOI: 10.1021/acsphotonics.7b01423

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.