Light Manipulation by Gold Nanobumps

C.M. Chang, C.H. Chu, M.L. Tseng, Y.-W. Huang, H.W. Huang, B.H. Chen, D.-W. Huang, Din-ping Tsai

Research output: Journal article publicationJournal articleAcademic researchpeer-review

15 Citations (Scopus)


Backward and forward scattering of surface plasmonic wave interactions from gold nanobumps on the surface of a 30-nm gold thin film demonstrate three-dimensional (3-D) focusing and diverging properties. Fan-shaped forward scattering of an individual nanobump is observed. A quarter-circle structure composed of nanobumps is exploited to manipulate scattering from each nanobump. Experimental results show that 3-D propagation vectors generated by the gold nanobumps with their heights of 16 nm can deflect the surface plasmonic waves to produce 3-D focusing at 3. 6 ?m above the surface of the gold film. We clearly demonstrate that 3-D forward and backward focusing from gold nanobumps are with different amplitudes and directions of the vertical propagation vectors. © 2012 Springer Science+Business Media, LLC.
Original languageEnglish
Pages (from-to)563-569
Number of pages7
Issue number3
Publication statusPublished - 1 Sep 2012
Externally publishedYes


  • Focusing
  • Nanostructures
  • Optics at surfaces
  • Scattering light
  • Surface plasmons

ASJC Scopus subject areas

  • Biotechnology
  • Biophysics
  • Biochemistry

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