Ultrafast nonlinear response of gold gyroid three-dimensional metamaterials

Petros Farah, Angela Demetriadou, Stefano Salvatore, Silvia Vignolini, Morgan Stefik, Ulrich Wiesner, Ortwin Hess, Ullrich Steiner, Ventsislav K. Valev, Jeremy J. Baumberg

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

We explore the nonlinear optical response of three-dimensional gyroidal metamaterials, which show greater than tenfold enhancements compared to all other metallic nanomaterials as well as bulk gold. A simple analytical model for this metamaterial response shows how the reflectivity spectrum scales with the metal fill fraction and the refractive index of the material that the metallic nanostructure is embedded in. The ultrafast response arising from the interconnected three-dimensional nanostructure can be separated into electronic and lattice contributions with strong spectral dependences on the dielectric filling of the gyroids, which invert the sign of the nonlinear transient reflectivity changes. These metamaterials thus provide a wide variety of tunable nonlinear optical properties, which can be utilized for frequency mixing, optical switching, phase modulators, novel emitters, and enhanced sensing.

Original languageEnglish
Article number044002
JournalPhysical Review Applied
Volume2
Issue number4
DOIs
Publication statusPublished - 7 Oct 2014

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Farah, P., Demetriadou, A., Salvatore, S., Vignolini, S., Stefik, M., Wiesner, U., Hess, O., Steiner, U., Valev, V. K., & Baumberg, J. J. (2014). Ultrafast nonlinear response of gold gyroid three-dimensional metamaterials. Physical Review Applied, 2(4), [044002]. https://doi.org/10.1103/PhysRevApplied.2.044002