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Load along a Single Axis01:29

Load along a Single Axis

In structural engineering, the analysis of beams subjected to varying loads is a critical aspect of understanding the behavior and performance of these structural elements. A common scenario involves a beam subjected to a combination of different load distributions.
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Trapezoidal prism-coupled SPR.

Fenglin Zhang, Xinpu Zhang, Ming Lin

    Applied Optics
    |August 12, 2025
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    Summary
    This summary is machine-generated.

    A novel trapezoidal prism enhances surface plasmon resonance (SPR) systems for commercial viability. This design simplifies assembly and improves miniaturization for sensitive biochemical sensing applications.

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    Area of Science:

    • Optoelectronics
    • Biomedical Engineering
    • Nanotechnology

    Background:

    • Traditional triangular prism-based surface plasmon resonance (SPR) systems offer stability and high sensitivity.
    • However, limitations in optical properties of triangular prisms hinder SPR miniaturization and precise light path regulation.
    • This necessitates exploring alternative prism designs for improved SPR system performance.

    Purpose of the Study:

    • To develop a prism-coupled SPR system utilizing a trapezoidal prism as a coupling element.
    • To enhance SPR system design for simplified adjustment, assembly, and optical configuration.
    • To evaluate the performance and potential of the new SPR system for biochemical sensing.

    Main Methods:

    • A novel SPR system was designed and constructed using a specialized trapezoidal prism.
    • Experimental characterization of the SPR system's performance, including resonance depth and refractive index sensitivity.
    • Verification of the system's applicability for biochemical sensing through immunoglobulin G binding kinetics analysis.

    Main Results:

    • The trapezoidal prism SPR system demonstrated a refractive index sensitivity of 3465 nm/RIU.
    • The system exhibited high stability, with a relative standard deviation of 0.1020%.
    • Successful verification of biochemical sensing capabilities via immunoglobulin G binding kinetics.

    Conclusions:

    • The developed trapezoidal prism SPR system offers a structurally simple, compact, and easily adjustable configuration.
    • The system achieves high sensitivity and stability, making it suitable for practical SPR applications.
    • This design provides valuable insights for the development of next-generation miniaturized and practical SPR biosensing platforms.