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Related Concept Videos

Interference and Diffraction02:18

Interference and Diffraction

Interference is a characteristic phenomenon exhibited by waves. When two electromagnetic waves interact with their peaks and troughs coinciding, a resulting wave with enhanced amplitude is produced. This is known as constructive interference. In this case, the two waves interacting are in phase with each other.
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Accurately determining beam deflection and slope under various loading conditions in structural engineering is crucial for ensuring safety and structural integrity. Singularity functions offer a streamlined approach to analyzing beams, especially when multiple loading functions complicate the bending moment equation.
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Atomic Absorption Spectroscopy: Interference01:25

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Interference leads to systematic error in atomic absorption (AA) measurements by enhancing or diminishing the analytical signal or the background. These interferences can be grouped into three main categories: spectral interference, chemical interference, and physical interference.
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Related Experiment Video

Updated: Jun 22, 2026

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
13:44

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

Published on: December 27, 2012

Diffraction-Attenuation resistant beams in absorbing media.

Michel Zamboni-Rached

    Optics Express
    |June 9, 2009
    PubMed
    Summary

    Researchers developed a theoretical method to create stationary wave fields in absorbing media. These novel Bessel beams resist loss over long distances, enabling applications in optical tweezers and medical devices.

    Area of Science:

    • Physics
    • Optics
    • Wave Phenomena

    Background:

    • Bessel beams are known for their nondiffractive properties.
    • Controlling the longitudinal intensity of wave fields in absorbing media remains a challenge.
    • Existing methods often struggle with signal loss over propagation distances.

    Purpose of the Study:

    • To develop a theoretical method for generating localized stationary wave fields in absorbing media.
    • To create new nondiffractive beams that exhibit enhanced resistance to loss.
    • To enable precise control over the longitudinal intensity pattern of these beams.

    Main Methods:

    • Utilizing superpositions of equal-frequency Bessel beams.
    • Developing a theoretical framework for wave field manipulation in absorbing media.

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  • Analyzing the properties of the resulting stationary wave fields.

    • Main Results:

    • Successfully obtained localized stationary wave fields in absorbing media.
    • Demonstrated the ability to approximate arbitrary longitudinal intensity patterns within a defined interval (0 <= z <= L).
    • Generated novel nondiffractive beams capable of maintaining integrity over extended distances despite loss effects.

    Conclusions:

    • The proposed theoretical method offers a new way to engineer wave fields with tailored longitudinal intensity profiles.
    • The developed Bessel beams show significant potential for applications requiring robust propagation in lossy environments.
    • These findings open avenues for advanced optical and acoustic technologies, including medical instrumentation.