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Effective plasmonic mode-size converter.

Hae-Ryeong Park1, Jong-Moon Park, Min-su Kim

  • 1School of Information and Communication Engineering, Sungkyunkwan University, Suwon, Gyeonggi-do 440-746, Korea.

Optics Express
|November 24, 2011
PubMed
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Plasmonic mode-size converters (PMSCs) effectively reduce coupling losses for long-range surface plasmon polaritons (LR-SPPs). These devices squeeze mode intensity, enabling integration of micro- and nano-plasmonic circuits.

Area of Science:

  • Photonics and Plasmonics
  • Nanotechnology
  • Integrated Optics

Background:

  • Long-range surface plasmon polaritons (LR-SPPs) are crucial for integrated photonic circuits.
  • Efficient mode conversion is necessary to bridge micro- and nano-scale plasmonic devices.
  • Existing methods face challenges in minimizing losses during mode transformation.

Purpose of the Study:

  • To design and demonstrate plasmonic mode-size converters (PMSCs) for LR-SPPs at 1.55 μm.
  • To investigate the impact of laterally tapered insulator-metal-insulator-metal-insulator waveguides (LT-IMIMI-Ws) on device performance.
  • To reduce coupling losses between optical fibers and plasmonic waveguides.

Main Methods:

  • Fabrication of PMSCs comprising insulator-metal-insulator (IMI) and LT-IMIMI waveguides.

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Last Updated: May 27, 2026

Evaluating Plasmonic Transport in Current-carrying Silver Nanowires
09:00

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Published on: December 11, 2013

Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
07:39

Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons

Published on: July 21, 2018

Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle
15:06

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Published on: January 3, 2016

  • Finite element method (FEM) for calculating LR-SPP mode-intensity sizes.
  • Cut-back method for analyzing propagation and coupling losses.
  • Experimental measurement of mode-intensity sizes and losses.

    • Main Results:

    • A ~27° angled LT-IMIMI-W significantly reduced coupling loss by ~3.4 dB.
    • Mode-intensity in the output of the PMSC was compressed to ~35% of the input.
    • Propagation and coupling losses were analyzed, demonstrating the effectiveness of the LT-IMIMI-W design.

    Conclusions:

    • PMSCs offer a viable solution for efficient mode-size conversion in LR-SPP systems.
    • The developed PMSC design facilitates the integration of micro- and nano-plasmonic circuits.
    • This technology holds potential for advancing on-chip optical communication and sensing.