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Area of Science:

  • Photonics and Wave Phenomena
  • Optical Data Storage
  • Nonlinear Optics

Background:

  • The
  • trapped rainbow
  • concept aims to permanently store different optical frequencies at distinct locations, crucial for advanced data processing.
  • Previous attempts faced challenges with intermodal coupling reflections and simultaneous frequency differentiation, preventing true rainbow trapping.

Purpose of the Study:

  • To discover a physical mechanism for achieving a genuine
  • trapped rainbow
  • effect for electromagnetic waves.
  • To demonstrate a stable and robust method for optical frequency storage and processing.

Main Methods:

  • Utilizing nonreciprocal waveguides configured with a tapered magnetic field.
  • Employing frequency and time domain simulations to analyze wave behavior.
  • Investigating the stability of the trapping mechanism against fabrication imperfections.

Main Results:

  • Successfully demonstrated a true
  • trapped rainbow
  • effect, trapping distinct frequency components at different positions.
  • Observed stable trapping even with fabrication disorders.
  • Identified hot spots and extended wave duration near critical positions.

Conclusions:

  • The proposed nonreciprocal waveguide system provides a viable physical mechanism for true
  • trapped rainbow
  • storage.
  • This breakthrough offers potential applications in wave energy harvesting, storage, and nonlinearity enhancement.