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Enabling Manufacturable Optical Broadband Angular-Range Selective Films.

Kezhen Yin1, Yurui Qu2, Steven E Kooi3

  • 1Lux Labs, Inc., Boston, Massachusetts 02210, United States.

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|December 3, 2021
PubMed
Summary
This summary is machine-generated.

Researchers developed a large-scale, low-cost method for creating broadband angular-range selective films. These films control light direction across the visible spectrum, offering transparency at normal incidence and reflectivity at wider angles.

Keywords:
angular selectivebroadbandmultilayeroptical filmpolymer

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Area of Science:

  • Optics and Photonics
  • Materials Science

Background:

  • Controlling light propagation direction is a key scientific objective.
  • Large-scale fabrication of optical angular-range selective films remains a significant challenge.

Purpose of the Study:

  • To present a polymer-enabled, large-scale fabrication method for broadband angular-range selective films.
  • To achieve spectral performance across the entire visible spectrum.

Main Methods:

  • Stacking multiple one-dimensional photonic crystals with engineered periodicities.
  • Enlarging the photonic bandgap across a wide spectral range based on theoretical predictions.

Main Results:

  • Demonstrated broadband transparency for incident angles centered around normal incidence.
  • Achieved reflectivity at larger viewing angles.
  • Successfully fabricated films at large scale and low cost.

Conclusions:

  • The developed method enables cost-effective, large-scale production of angular-range selective films.
  • These films offer tunable optical properties for various applications.
  • The approach overcomes previous limitations in fabricating such specialized optical materials.