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25 May 2005 3D luminescent photonic crystal structures
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Abstract
We report the fabrication of photonic crystal phosphors by atomic layer deposition and the subsequent removal of self-assembled opal templates. ZnS:Mn and TiO2 inverse opals as well as ZnS:Mn/TiO2 composite inverse opals were formed. Shifts in the G-L photonic band gap positions were confirmed by reflectivity and transmission measurements and were consistent with photonic band structure calculations. The peak positions confirm that filling terminates at ~86% of the pore volume in agreement the maximum possible filling fraction for the “shell” infiltration of an opal structure. For TiO2 depositions, SEM and AFM analysis reveals ultra-smooth highly conformal films. In addition, infiltration control to < 1 nm was achieved, making fine-tuning of PC properties possible. Significant changes were observed in the emission characteristics for composite ZnS:Mn/TiO2 photonic crystals. This work demonstrates that precisely controlling the placement of materials is possible by ALD, enabling the fabrication of “optimized” structures, including those which modify emission properties.
© (2005) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
C. J. Summers, E. Graugnard, and J. S. King "3D luminescent photonic crystal structures", Proc. SPIE 5801, Cockpit and Future Displays for Defense and Security, (25 May 2005); https://doi.org/10.1117/12.603801
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