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Related Concept Videos

Photoluminescence: Applications01:14

Photoluminescence: Applications

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Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
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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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Related Experiment Video

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Author Spotlight: Advancing Bioimaging and Therapy with Functional Nanomaterials
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3D luminescent concentrators.

Pierre Pichon, François Balembois, Frédéric Druon

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    |March 17, 2021
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    Summary
    This summary is machine-generated.

    High-brightness incoherent sources are developed using luminescent concentrators. Light confinement in 3 dimensions boosts brightness by an additional order of magnitude, surpassing current LED technology.

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    Area of Science:

    • Optics and Photonics
    • Materials Science

    Background:

    • High-brightness incoherent sources are crucial for various applications.
    • Luminescent concentrators (LCs) offer a pathway to enhance source brightness.
    • Current LCs utilize 1D or 2D light confinement, exceeding LED brightness by one order of magnitude.

    Purpose of the Study:

    • To investigate the potential of 3D light confinement in LCs for further brightness enhancement.
    • To explore novel designs for advanced luminescent concentrators.

    Main Methods:

    • Analytical modeling of light propagation and confinement in high-index media.
    • Experimental validation using Cerium-doped luminescent concentrators pumped by Indium Gallium Nitride (InGaN) LEDs.

    Main Results:

    • Demonstrated that 3D light confinement in LCs can increase brightness by an additional order of magnitude.
    • Analytical predictions were validated by experimental outcomes.
    • Achieved brightness levels significantly exceeding conventional LED sources.

    Conclusions:

    • 3D light confinement offers new design possibilities for luminescent concentrators.
    • This approach enables the development of exceptionally bright incoherent light sources.
    • Paves the way for next-generation high-brightness optical devices.