Dual-Stacked Photonic Crystal for Transmissive Filtering Fabricated by Two- Photon Polymerization

The combination of two periodic dielectric stacks is presented as an alternative to introducing defect layers for inducing a narrow transmissive region within the reflective photonic bandgap. This method increases the overall bandgap width when compared with a single periodic stack with a defect. While the transmissive band is not as narrow as in the defect design, the transmission region does demonstrate less sensitivity to layer thickness non-uniformity. The dual-stacked photonic crystal may be more compatible with fabrication by two-photon polymerization for inducing a transmission band within the photonic bandgap.