Applied Physics LettersMechanical properties of photopolymerized photonic crystal PhC structures having woodpile and
spiral three-dimensional architectures were examined using flat-punch indentation. The structures
were found to exhibit a foamlike response with a bend-dominated elastic deformation regime
observed at strain levels up to 10%. Numerical simulations of optical properties of these PhC
structures demonstrate the possibility of achieving a substantial and reversible spectral tuning of the
photonic stop gap wavelength by applying a mechanical load to the PhC