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Area of Science:

  • Optics and Photonics
  • Fluid Dynamics
  • Optical Engineering

Background:

  • Structured light applications in optical manipulation, processing, and imaging are limited by conventional Helmholtz equation solutions.
  • Existing methods restrict structured light to fixed propagation laws in free space.

Purpose of the Study:

  • To reframe structured light using a hydrodynamic description for flexible free-space structuring.
  • To demonstrate on-demand generation of diverse beam families with tailored propagation dynamics.
  • To explore applications in optofluidics and free-space optical communications.

Main Methods:

  • Reframing structured light as optical flows within a hydrodynamic framework.
  • Employing streamline engineering for flexible light structuring in free space.
  • Utilizing optical tweezers experiments analogous to fluid particle-tracking velocimetry for validation.

Main Results:

  • Demonstrated on-demand generation of Gaussian, Bessel, Airy, and vortex beams with controlled propagation.
  • Introduced specialized modes to overcome complex propagation challenges.
  • Validated designed energy streamlines through optofluidic manipulation experiments.

Conclusions:

  • The hydrodynamic framework offers precise control over free-space structured light.
  • This approach opens new possibilities in optomechanics, optofluidics, imaging, metrology, and communications.
  • Tailored vortex modes show potential for improved free-space optical communication capacity and resilience.