Plasmonics

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Possible Plasmonic Acceleration of LED Modulation for Li-Fi Applications

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Abstract

Emerging LED-based wireless visible light communication (Li-Fi) needs faster LED response to secure desirable modulation rates. Decay rate of an emitter can be enhanced by plasmonics, typically by an expense of efficiency loss because of non-radiative energy transfer. In this paper, metal-enhanced radiative and non-radiative decay rates are shown to be reasonably balanced to get with Ag nanoparticles nearly 100-fold enhancement of the decay rate for a blue LED without loss in overall efficacy. Additionally, gain in intensity occurs for intrinsic quantum yield Q0 < 1. With silver, rate enhancement can be performed through the whole visible. For color-converting phosphors, local field enhancement along with decay rate effects enable 30-fold rate enhancement with gain in efficacy. Since plasmonics always enhances decay rate, it can diminish Auger processes thus extending LED operation currents without efficiency droop. For quantum dot phosphors, plasmonic diminishing of Auger processes will improve photostability.

Keywords

Wireless visible light communication Li-Fi LED Plasmonics Metal-enhanced electroluminescence Metal-enhanced fluorescence 

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018
corrected publication March/2018

Authors and Affiliations

  • D. V. Guzatov
    • 1
  • S. V. Gaponenko
    • 2
  • H. V. Demir
    • 3
    • 4
  1. 1.Yanka Kupala State University of GrodnoGrodnoBelarus
  2. 2.B. I. Stepanov Institute of PhysicsNational Academy of SciencesMinskBelarus
  3. 3.Department of Electrical and Electronics Engineering, Department of Physics, and UNAM–Institute of Materials Science and NanotechnologyBilkent UniversityAnkaraTurkey
  4. 4.LUMINOUS! Center of Excellence for Semiconductor Lighting and Displays, School of Electrical and Electronic Engineering, School of Physical and Mathematical SciencesNanyang Technological UniversitySingaporeSingapore

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