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Updated: Jun 20, 2026

Femtosecond Laser Filaments for Use in Sub-Diffraction-Limited Imaging and Remote Sensing
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Published on: April 25, 2019

Deep-ultraviolet spatial-period division using an excimer laser.

A M Hawryluk, H I Smith, R M Osgood

    Optics Letters
    |August 29, 2009
    PubMed
    Summary
    This summary is machine-generated.

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    Researchers fabricated a 99.5-nm grating pattern using deep-ultraviolet (DUV) lithography and spatial-period division. This advanced technique offers advantages over soft X-rays for sub-100 nm pattern fabrication.

    Area of Science:

    • Nanofabrication
    • Lithography
    • Optics

    Background:

    • Achieving sub-100 nm periodic and quasi-periodic patterns is crucial for advanced optical and electronic devices.
    • Traditional lithography methods face challenges in resolving such fine features.

    Purpose of the Study:

    • To demonstrate a novel deep-ultraviolet (DUV) lithography technique for fabricating sub-100 nm grating patterns.
    • To evaluate the advantages of DUV radiation over soft X-rays for spatial-period division lithography.

    Main Methods:

    • Utilized the deep-UV output from an ArF laser.
    • Employed a grating mask with a 199-nm spatial period.
    • Fabricated a 99.5-nm-period grating pattern in polymethyl methacrylate resist via spatial-period division.

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    Main Results:

    • Successfully fabricated a 99.5-nm-period grating pattern.
    • Demonstrated the feasibility of spatial-period division using DUV lithography for sub-100 nm features.

    Conclusions:

    • Deep-UV radiation is advantageous for sub-100 nm lithography of periodic and quasi-periodic patterns, including Fresnel zone plates, using spatial-period division.
    • This method provides a viable alternative to soft X-ray lithography for high-resolution pattern generation.