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Related Concept Videos

Photoluminescence: Applications01:14

Photoluminescence: Applications

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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Related Experiment Video

Updated: Jul 7, 2026

Low-energy Cathodoluminescence for (Oxy)Nitride Phosphors
07:03

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Published on: November 15, 2016

Optimized light emission from layered porous silicon structures.

E K Squire, P S Russell, P A Snow

    Applied Optics
    |February 28, 2008
    PubMed
    Summary

    Researchers explored light emission from porous silicon microcavities. They developed a model showing porosity changes affect light emission, refractive index, and absorption, achieving results comparable to conventional systems.

    Area of Science:

    • Materials Science
    • Optoelectronics
    • Photonics

    Background:

    • Porous silicon microcavities offer tunable optical properties.
    • Multilayered structures with modulated porosity are key for advanced photonic devices.
    • Understanding the interplay between porosity, refractive index, absorption, and luminescence is crucial.

    Purpose of the Study:

    • To investigate the physics of light emission in multilayered porous silicon microcavities.
    • To develop a comprehensive model accounting for key physical parameters.
    • To compare the performance of porous silicon microcavities with conventional systems.

    Main Methods:

    • Fabrication of multilayered porous silicon microcavities by modulating porosity.
    • Development of a transfer matrix model.

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    Last Updated: Jul 7, 2026

    Low-energy Cathodoluminescence for (Oxy)Nitride Phosphors
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    Polycrystalline Silicon Thin-film Solar cells with Plasmonic-enhanced Light-trapping
    09:32

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  • Analysis of refractive index dispersion, absorption, and photoluminescence.

    • Main Results:

    • Modulating porosity significantly impacts refractive index, absorption, and luminescence.
    • A complex interplay of these effects governs light emission.
    • The developed model accurately describes these phenomena.
    • Porous silicon mirrors demonstrate light emission performance rivaling conventional distributed feedback microcavities.

    Conclusions:

    • Porous silicon microcavities exhibit tunable light emission properties.
    • The developed transfer matrix model provides a robust framework for analysis.
    • These structures show promise for applications in photonic devices and light-emitting systems.