Three-Dimensional Light Manipulation by Gold Nanobumps
Journal
Frontiers in Optics
Date Issued
2013-10
Author(s)
Wei-Lun Hsu
Chia Min Chang
Cheng Hung Chu
I-Da Chiang
Min Lun Tseng
Yao-Wei Huang
Hsin Wei Huang
Bo Han Chen
Din Ping Tsai
Abstract
Gold nanobumps on the surface of a gold thin film would scatter surface plasmon wave to forward and backward scattering light. Both dot array and chains of gold nanobumps are built to demonstrate the light-manipulating properties. While fan-shaped forward scattering light from individual nanobump is observed, three-dimensional (3-D) light focusing and diverging properties is found from quarter circle structure composed of nanobumps. Nanobumps with their heights of 16nm can deflect the surface plasmon waves to produce 3-D focusing at 3.6 micron above the surface of gold film. Experiment results clearly demonstrate that 3-D forward and backward focusing from gold nanobumps are with different amplitudes and directions of the vertical propagation vectors. © OSA 2013.
Other Subjects
Focusing; Forward scattering; Gold; Light scattering; Surface plasmons; Thin films; Dot array; Forward-and-backward; Gold film; Gold thin films; Propagation vector; Quarter circles; Surface plasmon waves; Threedimensional (3-d); Light
Type
conference paper