AUTHOR=Fan Yuancheng , Zhao Qian , Zhang Fuli , Shen Nian-Hai TITLE=Editorial: Tunable and Reconfigurable Optical Metamaterials JOURNAL=Frontiers in Physics VOLUME=9 YEAR=2021 URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2021.713966 DOI=10.3389/fphy.2021.713966 ISSN=2296-424X