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Polarization properties of plasmonic color filters comprised of arrays of subwavelength size holes on Au films

Wang Pei-Pei Yang Chao-Jie Li Jie Tang Peng Lin Feng Zhu Xing

Polarization properties of plasmonic color filters comprised of arrays of subwavelength size holes on Au films

Wang Pei-Pei, Yang Chao-Jie, Li Jie, Tang Peng, Lin Feng, Zhu Xing
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  • Received Date:  16 March 2013
  • Accepted Date:  20 May 2013
  • Published Online:  05 August 2013

Polarization properties of plasmonic color filters comprised of arrays of subwavelength size holes on Au films

  • 1. State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China;
  • 2. National Center for Nanoscience and Nanotechnology, Beijing 100190, China
Fund Project:  Project supported by the National Basic Research Program of China (Grant No. 2012CB933004) and the National Natural Science Foundation of China (Grant Nos. 61176120, 60977015).

Abstract: Plasmonic color filters comprised of metal films can be adjusted easily. Periodic arrays of subwavelength size holes with circle, square and rectangular shape are fabricated on 200 nm thick Au films by using focused ion beam. The structures are utilized as plasmonic color filters for exhibiting color variation under the illumination of white light in different polarization directions. We find that for rectangular hole arrays, the color of the transmitted light changes greatly with polarization direction. However, for arrays of circle and square holes, color of the transmitted light is not sensitive to the polarization direction of incident light. We conclude that localized surface plasmon around a single hole is a key factor in influencing the color of transmission light, rather than surface plasmon polaritons induced by periodic arrays. If incident light does not excite the localized surface plasmon around the holes, the effect of surface plasmon polariton will disappear, Based on different display colors of transmitted light of the subwavelength holes with polarization, a composite color display sample is prepared, which will exhibit different color patterns as the polarization direction of incident light changes.

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