Three-dimensional light manipulation by plasmonic nanostructure

摘要

Nanobump structures are fabricated on the gold thin film by femtosecond laser direct writing (fs-LDW) technique. Theheight and diameter of the gold nanobump are about 30nm, and 400 nm, respectively. The scattering light of surfaceplasmon wave radiated from a nanobump is observed using a total internal reflection microscopy. A quarter-circlestructure composed of nanobumps is designed and produced to manipulate scattering light into specific pattern: Thefocusing and diverging of the quarter circular structure in three dimensional space are demonstrated. The polarizationproperties of focusing spot are also examined.© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.