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Related Concept Videos

Super-resolution Fluorescence Microscopy01:37

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Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been...
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Updated: Jun 15, 2025

Simultaneous Multicolor Imaging of Biological Structures with Fluorescence Photoactivation Localization Microscopy
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Fifth-harmonic and five-photon excitation fluorescence multiphoton microscopy.

Joshua H Magnus, Lam T Nguyen, Elana G Alevy

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    |June 13, 2025
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    We introduce advanced multiphoton microscopy using fifth-harmonic and five-photon excitation. This label-free imaging offers higher resolution and deeper tissue penetration for biological and material science applications.

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    Area of Science:

    • Optics and Photonics
    • Biomedical Imaging
    • Materials Science

    Background:

    • Multiphoton microscopy is a powerful technique for biological imaging.
    • Existing methods face limitations in resolution and penetration depth.
    • Label-free imaging is desirable to avoid altering biological samples.

    Purpose of the Study:

    • To introduce and characterize a novel label-free imaging modality using fifth-harmonic and five-photon excitation.
    • To evaluate the performance of this new technique.
    • To explore its potential applications in various scientific fields.

    Main Methods:

    • Application of fifth-harmonic excitation fluorescence multiphoton microscopy.
    • Application of five-photon excitation fluorescence multiphoton microscopy.
    • Characterization through spectral and power dependence measurements.

    Main Results:

    • Demonstrated a novel label-free imaging modality.
    • Characterized spectral and power dependencies.
    • Achieved higher resolution imaging compared to conventional methods.

    Conclusions:

    • Fifth-harmonic and five-photon excitation fluorescence multiphoton microscopy is a viable label-free imaging technique.
    • This modality offers advantages in resolution and potential for deeper penetration.
    • Potential applications span biological research, materials characterization, geologic studies, and semiconductor manufacturing.