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.
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 language | English |
|---|---|
| Article number | 044002 |
| Number of pages | 8 |
| Journal | Physical Review Applied |
| Volume | 2 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 7 Oct 2014 |