Abstract
The bandgap characteristics of one-dimensional (1D) photonic crystal (PC) heterostructures containing defects are studied using the transfer matrix method. The key is to search for the best combination style for different 1D PCs to form heterostructures containing Si/MgF2 multilayer films. The non-transmission range over the entire visible range can be enlarged substantially, and the phenomenon of three-color PC filters in blue–green–red light can be realized by adjusting the repeat cycle counts of various PCs. With perfect omnidirectional and high peak transmission three-color filters for the electric magnetic (TE) mode, this optimization design opens a promising way to fabricate three-color PC filters with a wide non-transmission range in the visible range, which can be applied to white LEDs.
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