  When the feature size of photonic structures becomes comparable or even
smaller than the wavelength of light, the fabrication imperfections inevitably
introduce disorder that may eliminate many functionalities of subwavelength
photonic devices. Here we suggest a novel concept to achieve a robust bandgap
which can endure disorder beyond 30 as a result of the transition from photonic
crystals to Mie-resonant metamaterials. By utilizing Mie-resonant metamaterials
with high refractive index, we demonstrate photonic waveguides and cavities
with strong robustness to position disorder, thus providing a novel approach to
the bandgap-based nanophotonic devices with new properties and functionalities.
