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Related Experiment Video

Updated: Apr 12, 2026

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters
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[Strong and tunable field enhancement obtained by periodic rectangular pit structure].

Meng Wang, Bin Wang, Su-yang Fu

    Guang Pu Xue Yu Guang Pu Fen Xi = Guang Pu
    |May 16, 2015
    PubMed
    Summary

    Researchers developed a novel periodic rectangular pit nanostructure for enhanced optical near-fields. Tuning structural parameters allows control over surface plasmon resonance (SPR) wavelengths from 500 to 1000 nm.

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    External validation and prediction employing the predictive squared correlation coefficient test set activity mean vs training set activity mean.

    Journal of chemical information and modeling·2008

    Area of Science:

    • Plasmonics
    • Nanophotonics
    • Optical Engineering

    Context:

    • Surface plasmon resonance (SPR) is a key phenomenon in nanophotonics.
    • Controlling SPR is crucial for developing advanced optical devices.
    • Periodic nanostructures offer tunable optical properties.

    Purpose:

    • To design and simulate a novel periodic rectangular pit nanostructure substrate.
    • To investigate the optical near-field distribution and surface plasmon behavior.
    • To explore the tunability of plasmon resonant wavelengths by altering structural parameters.

    Summary:

    • A novel periodic rectangular pit nanostructure was designed and simulated using the finite element method.
    • Strongly enhanced optical near-fields (up to 20x) were observed at the pit edges.

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  • Plasmon resonant wavelengths were tunable from 500 to 1000 nm by adjusting period, pit dimensions, and environment refractive index.
  • Red shifts in SPR peaks correlated with increased period (Px) and pit length (l), while blue shifts occurred with increased pit width (w).
  • The observed shifts are attributed to wave vector matching conditions, excitation of propagating surface plasmon polaritons (SPP), and dipole-dipole coupling models.

    • Impact:

    • Provides a method for tuning plasmon resonant wavelengths in nanostructures.
    • Offers potential for applications in sensing, spectroscopy, and optical device development.
    • Contributes to the fundamental understanding of light-matter interactions in plasmonic nanostructures.