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Concept for three-dimensional optical addressing by ultralow one-photon absorption method.

Qinggele Li, Mai Trang Do, Isabelle Ledoux-Rak

    Optics Letters
    |December 11, 2013
    PubMed
    Summary

    Low one-photon absorption (LOPA) microscopy enables deep 3D imaging and fabrication up to 300 μm. This technique simplifies setups and reduces photodamage compared to two-photon methods.

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    Area of Science:

    • Microscopy and imaging techniques
    • Optical physics
    • Materials science

    Background:

    • High numerical aperture objective lenses are crucial for subwavelength focusing.
    • Material absorption affects light penetration depth in optical microscopy.
    • Two-photon absorption microscopy is a common technique but has limitations.

    Purpose of the Study:

    • To investigate the point spread function of a high numerical aperture objective lens considering material absorption.
    • To demonstrate the capability of ultralow one-photon absorption (LOPA) microscopy for deep 3D imaging and fabrication.
    • To compare LOPA-based microscopy with traditional two-photon absorption microscopy.

    Main Methods:

    • Utilizing a material with an ultralow one-photon absorption coefficient at the excitation wavelength.
    • Achieving tight focusing to a subwavelength spot.
    • Investigating deep material penetration up to 300 μm.

    Main Results:

    • LOPA-based microscopy allows deep light penetration, maintaining tight focusing.
    • Three-dimensional imaging and fabrication were achieved with a penetration depth of 300 μm.
    • LOPA microscopy simplifies experimental setups and minimizes photodamage/bleaching.

    Conclusions:

    • Ultralow one-photon absorption microscopy offers significant advantages for deep 3D imaging and fabrication.
    • LOPA microscopy provides a simplified and less damaging alternative to two-photon absorption microscopy.
    • This technique expands the possibilities for high-resolution optical applications in scattering or absorbing media.