TY - JOUR
T1 - Ultrafast nonlinear response of gold gyroid three-dimensional metamaterials
AU - Farah, Petros
AU - Demetriadou, Angela
AU - Salvatore, Stefano
AU - Vignolini, Silvia
AU - Stefik, Morgan
AU - Wiesner, Ulrich
AU - Hess, Ortwin
AU - Steiner, Ullrich
AU - Valev, Ventsislav K.
AU - Baumberg, Jeremy J.
PY - 2014/10/7
Y1 - 2014/10/7
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84922478057&partnerID=8YFLogxK
U2 - 10.1103/PhysRevApplied.2.044002
DO - 10.1103/PhysRevApplied.2.044002
M3 - Article
AN - SCOPUS:84922478057
SN - 2331-7019
VL - 2
JO - Physical Review Applied
JF - Physical Review Applied
IS - 4
M1 - 044002
ER -