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Related Concept Videos

Metallic Solids02:37

Metallic Solids

Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability. Many...

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Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
11:08

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Published on: November 30, 2012

Layer-by-layer three-dimensional chiral photonic crystals.

M Thiel1, G von Freymann, M Wegener

  • 1Institut für Angewandte Physik and DFG-Center for Functional Nanostructures (CFN), Universität Karlsruhe (TH), Wolfgang-Gaede-Strasse 1, D-76131 Karlsruhe, Germany. michael.thiel@physik.uni-karlsruhe.de

Optics Letters
|September 4, 2007
PubMed
Summary
This summary is machine-generated.

Researchers developed 3D layer-by-layer chiral photonic crystals with circular dichroism comparable to spiral designs. This fabrication method easily accesses telecommunication and visible wavelengths.

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Area of Science:

  • Materials Science
  • Optics
  • Nanotechnology

Background:

  • Chiral photonic crystals are crucial for manipulating light polarization.
  • Existing fabrication methods for 3D chiral photonic crystals can be complex and limited in wavelength accessibility.

Purpose of the Study:

  • To fabricate and characterize novel 3D layer-by-layer chiral photonic crystals.
  • To evaluate the circular dichroism properties of these crystals.
  • To demonstrate the accessibility of telecommunication and visible wavelengths using this fabrication approach.

Main Methods:

  • Fabrication of 3D polymeric photonic crystals using a layer-by-layer assembly technique.
  • Characterization of optical properties, specifically circular dichroism (CD).
  • Comparison of CD performance with existing chiral photonic crystal structures.

Main Results:

  • Successfully fabricated 3D layer-by-layer chiral photonic crystals.
  • Achieved circular dichroism from polarization stop bands comparable to circular-spiral photonic crystals.
  • Demonstrated facile access to telecommunication wavelengths and potential for visible wavelengths.

Conclusions:

  • The layer-by-layer approach is a viable method for fabricating 3D chiral photonic crystals.
  • These photonic crystals exhibit promising circular dichroism properties.
  • The method offers flexibility in tuning the accessible wavelength range, including telecommunication and visible spectra.