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Transport through Amorphous Photonic Materials with Localization and Bandgap Regimes.

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We developed a unified framework to describe light transmission in amorphous dielectric materials, explaining transparency, diffusion, and bandgap phenomena. This model accounts for photon localization and bandgap effects, improving our understanding of light transport.

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Area of Science:

  • Physics
  • Materials Science
  • Optics

Background:

  • Light transmission through disordered materials is complex, involving phenomena like diffusion and localization.
  • Photonic bandgaps in dielectric materials can control light propagation.
  • Unifying these descriptions has been a challenge.

Purpose of the Study:

  • To propose a unified theoretical framework for light transmission in 3D amorphous dielectric materials.
  • To explain the interplay between localization and photonic bandgap effects.
  • To quantitatively describe light transport across all regimes.

Main Methods:

  • Utilizing the self-consistent theory of localization.
  • Incorporating the density of states of photons.
  • Developing a framework to unify different light transport regimes.

Main Results:

  • Direct, coherent reflection near the bandgap suppresses diffuse or localized photons.
  • The framework quantitatively describes total light transmission for transparency, diffusion, localization, and bandgap regimes.
  • The theory aligns with numerical simulations of light transport in hyperuniform networks.

Conclusions:

  • The proposed framework successfully unifies the description of light transmission in amorphous dielectric materials.
  • Coherent reflection plays a crucial role in attenuating localized photon generation within bandgaps.
  • This work provides a quantitative model for understanding light transport across diverse regimes.