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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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Complete Photonic Band Gaps with Nonfrustrated ABC Bottlebrush Block Polymers.

Joshua Lequieu1, Timothy Quah, Kris T Delaney

  • 1Department of Chemical and Biological Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United States.

ACS Macro Letters
|June 1, 2022
PubMed
Summary
This summary is machine-generated.

Nonfrustrated ABC bottlebrush block polymers can self-assemble into 3D photonic crystals with complete photonic band gaps. This computational approach links polymer design to photonic properties, enabling new material development.

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Photonics

Background:

  • Bottlebrush block polymers offer potential for self-assembled photonic materials.
  • Current research primarily focuses on 1D photonic crystals from lamellar phases.

Purpose of the Study:

  • To demonstrate the self-assembly of 3D photonic crystals with complete photonic band gaps using nonfrustrated ABC bottlebrush block polymers.
  • To establish a computational method linking molecular design, self-assembly, and photonic band structures.

Main Methods:

  • Coupling self-consistent field theory (SCFT) simulations with Maxwell's equations.
  • Calculating phase diagrams for nonfrustrated ABC bottlebrush block polymers.
  • Computing photonic band structures for stable phases (alternating gyroid and diamond).

Main Results:

  • Identified stable regions for alternating gyroid and diamond phases.
  • Demonstrated complete photonic band gaps in thermodynamically stable phases.
  • Showed that band gap size is tunable by volume fraction, segregation strength, and polymer architecture.
  • Developed a symmetry-breaking strategy to achieve band gaps with lower refractive index contrast.

Conclusions:

  • Nonfrustrated ABC bottlebrush block polymers can form 3D photonic crystals with complete photonic band gaps.
  • The developed computational approach is a flexible tool for predicting self-assembly and photonic properties.
  • This work suggests a pathway for experimental realization of advanced polymeric photonic materials.