Content may be subject to copyright.This is the peer reviewed version of the following article: [Active Photoswitching of Sharp Fano Resonances in THz Metad... ...This is the peer reviewed version of the following article: [Active Photoswitching of Sharp Fano Resonances in THz Metadevices. Advanced Materials 29, 3 p1603355 (2017)], which has been published in final form at https://doi.org/10.1002/adma.201603355. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions: https://authorservices.wiley.com/author-resources/Journal-Authors/licensing/self-archiving.html#3.