A simulation study claims a GaN LED with one DBR pair and a TiO2 nanocylinder metasurface achieves 25.67 percent light extraction and a 5.7 degree beam, but the extraction metric and 2D approximations are unvalidated.
Trends in Food Science & Technology, p.105018
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Enhanced Light Extraction and Beam Focusing in GaN LEDs Using Hybrid Metasurface-Distributed Bragg Reflector Structures
A simulation study claims a GaN LED with one DBR pair and a TiO2 nanocylinder metasurface achieves 25.67 percent light extraction and a 5.7 degree beam, but the extraction metric and 2D approximations are unvalidated.