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Related Concept Videos

Super-resolution Fluorescence Microscopy01:37

Super-resolution Fluorescence Microscopy

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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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Total internal reflection fluorescence microscopy or TIRF is an advanced microscopic technique used to visualize fluorophores in samples close to a solid surface with a higher refractive index, such as a glass coverslip. TIRF only allows fluorophores in proximity to the solid surface to be excited. When light from a medium with a lower refractive index (such as air) hits the glass coverslip at a critical angle, the light undergoes total internal reflection stead of passing through the glass.
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Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...
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Updated: Sep 11, 2025

A Guide to Structured Illumination TIRF Microscopy at High Speed with Multiple Colors
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Virtually structured illumination for terahertz super-resolution imaging.

James P Fleming, Lucy A Downes, John M Girkin

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    |August 13, 2025
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    Summary
    This summary is machine-generated.

    Researchers achieved super-resolution imaging in the terahertz (THz) range using structured illumination. This technique enhanced image resolution by over 70% without complex deconvolution, enabling high-speed, high-resolution THz imaging.

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    Area of Science:

    • Optics and Photonics
    • Terahertz Science and Technology

    Background:

    • Terahertz (THz) imaging offers unique capabilities but is often limited by spatial resolution.
    • Achieving high spatial resolution in THz imaging typically requires complex post-processing or specialized setups.

    Purpose of the Study:

    • To demonstrate far-field super-resolution imaging in the terahertz frequency band.
    • To enhance the spatial resolution of THz imaging without relying on deconvolution algorithms.

    Main Methods:

    • Utilized structured illumination combined with the virtually structured detection (VSD) method.
    • Employed a previously developed high-speed, high-sensitivity atomic-based THz imager.

    Main Results:

    • Achieved a significant resolution enhancement of (74 ± 3)% at 0.55 THz.
    • Demonstrated super-resolution imaging without the need for deconvolution techniques.
    • Confirmed compatibility of high-speed THz imaging systems with advanced optical methods.

    Conclusions:

    • Far-field super-resolution THz imaging is feasible using structured illumination and VSD.
    • This advancement offers a pathway to disruptive applications demanding both high speed and high spatial resolution in the THz range.