Abstract:A mechanically tunable macroscale replica of the gyroid photonic crystal found in the Parides sesostris butterfly's wing scales is systematically characterized. By monitoring both photonic frequency changes and the distribution of stress fields within the compressed structure, electromagnetic transmission features are found and can be frequency-tuned and the structure only contains localized high stress fields when highly compressed.
The authors thank Nick Cole for construction of the custom-made compression device used in the microwave spectroscopy experiments and Dr. Maik Scherer for providing a customized MATLAB code for the rendering of virtual gyroid models. C.P. acknowledges financial support from The University of Exeter EPSRC DTA. M.K. acknowledges financial support from the Alexander von Humboldt Foundation in the form of a Feodor-Lynen Postdoctoral Research Fellowship. P.V. and J.A. acknowledge financial support from AFOSR Multidisciplinary University Research Initiative under FA9550-10-1-0020 and FA9550-09-1-0669- DOD35CAP. This work was performed in part at Harvard University’s Center for Nanoscale Systems (CNS), a member of the National Nanotechnology Infrastructure Network (NNIN), which is supported by the National Science Foundation under NSF award no. ECS-0335765.