LEAP Laboratory for advanced electromagnetics and photonics Array of gold rods covered with chromiumArray of nano canelésFocused ion beam cut of triangular silicon ridgesTriangular silicon ridges with oblique deposition of goldRectangular silicon ridgesArray of gold rods covered with chromiumArray of nano canelésFocused ion beam cut of triangular silicon ridgesTriangular silicon ridges with oblique deposition of goldRectangular silicon ridges