Ultrathin gradient nonlinear metasurface with a giant nonlinear response

Nishant Nookala, Jongwon Lee, Mykhailo Tymchenko, J. Sebastian Gomez-Diaz, Andrea Alu, Gerhard Boehm, Kueifu Lai, Gennady Shvets, Markus Christian Amann

Research output: Contribution to journalArticlepeer-review

77 Scopus citations

Abstract

Gradient metasurfaces have recently been demonstrated to provide control of the phase of scattered fields over subwavelength scales, enabling a broad range of linear optical components in a flat, ultrathin, integrable platform. Additionally, the development of nonlinear metasurfaces has disrupted conventional nonlinear optical device design by relaxing phase matching constraints, reducing size and dimensionality, and providing record values of localized nonlinear responses. However, extending the “flat optics” paradigm to the nonlinear case faces important challenges, since we are required to simultaneously achieve efficient frequency conversion and sub-diffractive phase control. Here, we experimentally demonstrate continuous phase control of the giant nonlinear second harmonic optical response from metasurfaces tied to intersubband transitions in semiconductor multi-quantum wells, establishing an exciting path toward realizing the vision of flat, nonlinear optics.

Original languageEnglish (US)
Article number030283
Pages (from-to)283-288
Number of pages6
JournalOptica
Volume3
Issue number3
DOIs
StatePublished - Mar 8 2016
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

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