Multispectral Electro-Optical Surfaces: from Visible to Microwave
Abstract
Optical materials with colour-changing abilities have been explored for display devices, smart windows, or modulation of visual appearance. The efficiency of these materials, however, has strong wavelength dependence, which limits their functionality to a narrow spectral range. Here, we report graphene-based electro-optical devices with unprecedented optical tunability covering the entire electromagnetic spectrum from the visible to microwave. We achieve this non-volatile and reversible tunability by electro-intercalation of lithium into graphene layers in an optically accessible device structure. This unique colour-changing capability, together with area-selective intercalation, inspires fabrication of new multispectral devices, including display devices and electro-optical camouflage coating. We anticipate that these results provide realistic approaches for programmable smart optical surfaces with a potential utility in many scientific and engineering fields.
Cite
@article{arxiv.2007.08385,
title = {Multispectral Electro-Optical Surfaces: from Visible to Microwave},
author = {M. Said Ergoktas and Gokhan Bakan and Evgeniya Kovalska and Lewis W. Le Fevre and Richard P. Fields and Pietro Steiner and Xiaoxiao Yu and Omer Salihoglu and Sinan Balci and Kostya Novoselov and Robert A. W. Dryfe and Coskun Kocabas},
journal= {arXiv preprint arXiv:2007.08385},
year = {2021}
}