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Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials
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Disordered Photonic Time Crystals.

Yonatan Sharabi1, Eran Lustig1, Mordechai Segev1

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This summary is machine-generated.

Electromagnetic waves stop and intensify in disordered photonic time crystals due to random refractive index changes. This phenomenon, similar to Anderson localization, depends on the crystal's Floquet band structure.

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Area of Science:

  • Photonics and Wave Propagation
  • Condensed Matter Physics
  • Nonlinear Optics

Background:

  • Disordered photonic time crystals exhibit dynamic refractive index modulation.
  • Understanding wave propagation in such complex media is crucial for novel optical devices.
  • Previous studies have explored static disorder, but dynamic disorder effects remain less understood.

Purpose of the Study:

  • To investigate the propagation dynamics of electromagnetic waves in disordered photonic time crystals.
  • To analyze the impact of temporal disorder on wave group velocity and intensity.
  • To explore the relationship between these effects and the Floquet band structure.

Main Methods:

  • Theoretical modeling of electromagnetic wave propagation.
  • Analysis of group velocity and intensity changes.
  • Investigation of Floquet band structure and its influence on disorder sensitivity.
  • Ensemble statistics analysis to compare with known localization phenomena.

Main Results:

  • Exponential decrease in group velocity, leading to wave localization (complete stop).
  • Exponential increase in wave intensity.
  • Strong dependence of these effects on the Floquet band structure, particularly in superluminal modes.
  • Ensemble statistics align with Anderson localization, demonstrating single-parameter scaling.

Conclusions:

  • Disordered photonic time crystals can halt and amplify electromagnetic waves.
  • The observed localization and amplification are governed by the dynamic disorder and Floquet band structure.
  • The findings establish a connection between dynamic disorder in photonic time crystals and Anderson localization in disordered solids.