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Ultraviolet–visible (UV–visible or UV–Vis) spectroscopy is an analytical technique that investigates the interaction between matter and UV–Vis light within the electromagnetic spectrum. This method is widely used for its versatility, simplicity, and relatively quick data acquisition, making it valuable for both qualitative and quantitative analysis. When UV–Vis radiation passes through a material,  molecules absorb light depending on the energy required for electronic transitions. As a result...
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Related Experiment Video

Updated: Jun 16, 2026

Fabrication of Ultra-thin Color Films with Highly Absorbing Media Using Oblique Angle Deposition
06:30

Fabrication of Ultra-thin Color Films with Highly Absorbing Media Using Oblique Angle Deposition

Published on: August 29, 2017

Reflective multilayer coatings for the far uv region.

E Spiller

    Applied Optics
    |February 19, 2010
    PubMed
    Summary

    This review covers reflective multilayer coatings for extreme ultraviolet and soft X-ray wavelengths. Optimizing material placement minimizes absorption losses, enabling high reflectivity near 100% above 1200 Å.

    Area of Science:

    • Optics and Photonics
    • Materials Science
    • Thin Film Technology

    Background:

    • Reflective multilayer coatings are crucial for manipulating light in specific wavelength regions.
    • Absorption losses in coating materials limit achievable reflectivity.
    • Understanding optical constants is key to designing high-performance coatings.

    Purpose of the Study:

    • To review progress in reflective multilayer coatings for the 50 Å to 2000 Å wavelength range.
    • To discuss strategies for minimizing absorption losses in these coatings.
    • To identify limitations and future research directions for improving coating performance.

    Main Methods:

    • Theoretical analysis of multilayer coating design, focusing on standing wave field optimization.
    • Experimental fabrication and characterization of multilayer coatings.

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    Published on: April 26, 2017

    Related Experiment Videos

    Last Updated: Jun 16, 2026

    Fabrication of Ultra-thin Color Films with Highly Absorbing Media Using Oblique Angle Deposition
    06:30

    Fabrication of Ultra-thin Color Films with Highly Absorbing Media Using Oblique Angle Deposition

    Published on: August 29, 2017

    TiO2-coated Hollow Glass Microspheres with Superhydrophobic and High IR-reflective Properties Synthesized by a Soft-chemistry Method
    07:37

    TiO2-coated Hollow Glass Microspheres with Superhydrophobic and High IR-reflective Properties Synthesized by a Soft-chemistry Method

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  • Review of existing literature on coating performance and material properties.

    • Main Results:

    • High reflectivity approaching 100% is theoretically possible above 1200 Å, with experimental confirmation up to six layers.
    • Below 1000 Å, material limitations restrict theoretical reflectivity, though 30% is achievable.
    • Experimental results up to nine layers between 100 Å and 200 Å show discrepancies with theory, attributed to unknown optical constants.

    Conclusions:

    • Optimizing material placement within the standing wave field is effective for minimizing absorption losses.
    • Theoretical reflectivity is limited below 1000 Å due to the lack of suitable absorption-free spacer materials.
    • Further research on optical constants and their dependence on deposition conditions is essential for advancing multilayer coating technology.