Time-varying electromagnetic media: opinion

In this opinion article, we briefly summarize some of the background materials and recent developments in the field of temporal and spatiotemporal media and provide our opinion on some of potential challenges, opportunities, and open research questions for manipulation of fields and waves in four dimensions. (c) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

Automated summary

This opinion article provides a brief summary of the background materials and recent developments in the field of temporal and spatiotemporal media, and offers opinions on potential challenges, opportunities, and open research questions for manipulating fields and waves in four dimensions.