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Updated: Sep 23, 2025

Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials
Published on: September 26, 2014
Vivid colours in hyperuniform complex-index photonic structures by resonant interference of photonic band gaps and
Chunhee Seo1, Jinho Hyon1,2, Soyeon Suk1
1Department of Chemistry, Hanyang University 222 Wangsimni-Ro, Seongdong-Gu Seoul 04763 Korea youngjkang@hanyang.ac.kr.
Abstract:
Hyperuniform photonic structures (HPSs) have been doped with complex index materials to increase their reflectivity and colour expression range. HPSs synthesized using dielectric SiO2 nanoparticles have been mixed with a small amount of dopant nanoparticles (c d ≤ 1%) having a complex refractive index. Various dyes including Sudan I, Sudan Blue II, Alizarin yellow GG, Bromocresol purple and polydopamine (PDA) are used as dopants. Large reflectivity enhancements of HPSs (∼100%) are observed by resonant interference of photonic band gaps (PBGs) and optical band gaps (OBGs). Reflectivity enhancements are observed only when PBGs of HPSs match with OBGs of dopants. The colour expression range of HPS increases by 600% by doping with melanine-like PDA nanoparticles, which have the imaginary part of the refractive index in whole visible range.
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