Incorporation of Point Defects into Self-Assembled Three-Dimensional Colloidal Crystals


  • This work was supported by the Agency for Science, Technology and Research (A STAR) of Singapore under grant number 0221090060 and the Nippon Sheet Glass Foundation.


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Point-defect arrays embedded in self-assembled silica colloidal photonic crystals (see Figure) have been fabricated using a combination of conventional “top–down” nanoimprinting lithography with “bottom–up” self assembly. The relative locations of the point defects in the structure can be precisely controlled. These structures may find use in technological applications such as low-threshold lasers and light-emitting diodes.