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Plasmonics

, Volume 13, Issue 6, pp 2249–2254 | Cite as

Light Funneling Profile During Enhanced Transmission Through a Subwavelength Metallic Slit

  • Jing-Wei Li
  • Jian-Shiung Hong
  • Wei-Ting Chou
  • Ding-Jie Huang
  • Kuan-Ren Chen
Article
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Abstract

The funneling profile of enhanced light transmission through a subwavelength slit in a perfect electric conductor is studied with finite-difference time-domain simulation. From the wave-charge interaction dynamics, it is found that the EM wave energy is funneled while charges are accumulated at the edges of the slit. The Poynting vector indicates a boundary within which the wave energy flows toward the slit. Therefore, a funneling profile is defined by this boundary; as the slit width and thickness determine the transmitted energy density, the size of the funneling area is a relevant quantity of major concern.

Keywords

Subwavelength slit Light funneling Fabry-Pérot resonance 
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Notes

Acknowledgments

The authors are grateful for support from Ministry of Science and Technology, Taiwan (MOST 104-2112-M-006-004-MY3) and computational resources at National Center for High-performance Computing (NCHC) of National Applied Research Laboratories (NARLabs) of Taiwan.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Jing-Wei Li
    • 1
  • Jian-Shiung Hong
    • 1
  • Wei-Ting Chou
    • 1
  • Ding-Jie Huang
    • 1
  • Kuan-Ren Chen
    • 1
  1. 1.Department of PhysicsNational Cheng Kung UniversityTainanTaiwan, Republic of China

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