10:00 〜 10:15
▲ [13a-C302-4] Plasmonic Growth of Patterned Silver Nanostructures with Fractal Geometry
キーワード：plasmonic growth, fractal geometry
Bulky metallic materials known as metamaterials, that are composed of subwavelength units of plasmonic metallic nanostructures, have been one of the hottest topics in photonics due to their exotic optical properties. However, the fabrication of complex metallic nanostructures in large scale in 3D is still under the development. Most of exciting demonstrations of exotic optical properties by metamaterials have been shown with thin or 2D structures, rather than thick bulky metamaterials, except a few examples such as 3D array of sprit ring resonators in microwave region.
To fabricate metamaterials in optical frequency region, the available nanotechnology is mostly based on silicon fabrication technology. For extending the dimensions into 3D as metamaterials, 2D-layer stacking method has been such as a multi-layered resonator array and a layered fishnet. Two-photon laser drawing is another method for realizing real 3D nano-fabrication. We have fabricated 3D spring array by electroless metal plating on two-photon polymerized microsprings. An array of square-pyramid frames without polymer has been also drawn with two-photon photo-reduction. Two-photon drawing is useful for fabricating arbitrary 3D plasmonic structures in three dimensions, while it takes an extremely long time for fabricating a large object in 3D.
We show a bottom-up approach for producing 3D silver nanostructures in a large scale. Bottom-up approach is more advantageous for building up or self-growing a large-scale complex nanostructures in 3D. Self-assembling of metallic nanoparticles has been studied by other groups where the nanoparticles are used as building-blocks. The silver nanostructures we grow can be as large as possible but with fine details.
To fabricate metamaterials in optical frequency region, the available nanotechnology is mostly based on silicon fabrication technology. For extending the dimensions into 3D as metamaterials, 2D-layer stacking method has been such as a multi-layered resonator array and a layered fishnet. Two-photon laser drawing is another method for realizing real 3D nano-fabrication. We have fabricated 3D spring array by electroless metal plating on two-photon polymerized microsprings. An array of square-pyramid frames without polymer has been also drawn with two-photon photo-reduction. Two-photon drawing is useful for fabricating arbitrary 3D plasmonic structures in three dimensions, while it takes an extremely long time for fabricating a large object in 3D.
We show a bottom-up approach for producing 3D silver nanostructures in a large scale. Bottom-up approach is more advantageous for building up or self-growing a large-scale complex nanostructures in 3D. Self-assembling of metallic nanoparticles has been studied by other groups where the nanoparticles are used as building-blocks. The silver nanostructures we grow can be as large as possible but with fine details.