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Related Experiment Videos

Tunable orbital angular momentum in high-harmonic generation.

D Gauthier1, P Rebernik Ribič1, G Adhikary2

  • 1Elettra-Sincrotrone Trieste, Area Science Park, 34149 Trieste, Italy.

Nature Communications
|April 6, 2017
PubMed
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This summary is machine-generated.

Researchers generated extreme-ultraviolet optical vortices with orbital angular momentum (OAM). This breakthrough enables new research in optical physics and material characterization at shorter wavelengths.

Area of Science:

  • Optics and Photonics
  • Quantum Optics
  • Nonlinear Optics

Background:

  • Optical vortices, light beams carrying orbital angular momentum (OAM), are widely used in visible and infrared applications.
  • Extending OAM applications to shorter wavelengths promises novel research avenues in optical physics and material characterization.

Purpose of the Study:

  • To report the generation of extreme-ultraviolet (XUV) optical vortices with femtosecond duration.
  • To demonstrate controllable orbital angular momentum (OAM) in XUV light.
  • To explore fundamental physics questions regarding angular momentum conservation and control in nonlinear light-matter interactions at short wavelengths.

Main Methods:

  • Generation of femtosecond extreme-ultraviolet (XUV) pulses.
  • Implementation of techniques to impart orbital angular momentum (OAM) onto XUV light.

Related Experiment Videos

  • Characterization of the generated XUV optical vortices and their OAM properties.

    • Main Results:

    • Successful generation of extreme-ultraviolet optical vortices with femtosecond pulse durations.
    • Demonstration of controllable orbital angular momentum (OAM) carried by these XUV vortex beams.
    • Experimental insights into angular momentum conservation in nonlinear light-matter interactions at short wavelengths.

    Conclusions:

    • The generation of XUV optical vortices opens new frontiers in optical physics and material science.
    • The developed methods allow for independent control of intrinsic and extrinsic angular momentum components at short wavelengths.
    • These findings facilitate testing of advanced concepts like OAM-induced dichroism and the violation of selection rules in atomic and molecular systems.