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Generation and Coherent Control of Pulsed Quantum Frequency Combs
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Deterministic quasi-random nanostructures for photon control.

Emiliano R Martins1, Juntao Li, YiKun Liu

  • 1SUPA, School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, KY16 9SS, UK.

Nature Communications
|October 25, 2013
PubMed
Summary

Researchers developed novel binary gratings to precisely control light flux. These structures enable efficient broad-band light trapping in thin films, crucial for advancing photovoltaic technology.

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Area of Science:

  • Optics and Photonics
  • Materials Science
  • Nanotechnology

Background:

  • Controlling photon flux is vital across science and technology.
  • Photonic crystals offer light manipulation through refractive index modulation.
  • Quasi-crystals present an alternative to periodic structures with unique Fourier spectra advantages.

Purpose of the Study:

  • To introduce a novel approach for designing materials with tunable Fourier spectra.
  • To utilize binary gratings for precise control over Fourier components.
  • To demonstrate a practical application in enhancing light trapping for photovoltaics.

Main Methods:

  • Design of periodic structures based on binary gratings.
  • Engineering nano-scale modulation of refractive index.
  • Application of designed structures for broad-band light trapping in thin films.

Main Results:

  • Achieved near-complete control over Fourier components of periodic structures.
  • Demonstrated highly efficient broad-band light trapping in thin films.
  • Approached the theoretical Lambertian limit for light trapping.

Conclusions:

  • Binary gratings offer a versatile and tailorable platform for advanced light control.
  • The developed approach significantly enhances light trapping efficiency in thin films.
  • This method holds substantial promise for improving photovoltaic device performance.