Institute of Semiconductors; Chinese Academy of Science; Beijing 100083 China
Electrical Engineering Department; University at Buffalo; The State University of New York; Buffalo NY 14260 USA
Department of Mechanical and Aerospace Engineering; University at Buffalo; The State University of New York; Buffalo NY 14260 USA
Division of Physical Science and Engineering; King Abdullah University of Science and Technology; Thuwal 23955 Saudi Arabia
State Key Laboratory on Tunable laser Technology; Ministry of Industry and Information Technology Key Lab of Micro-Nano Optoelectronic Information System; Shenzhen Graduate School; Harbin Institute of Technology; Shenzhen 518057 China
Recent advances in nanofabrication enable the realization of various extremely deep‐sub‐wavelength structures. Building upon the fundamental progress of light trapping and confinement strategies, new applications of boosted light–matter interaction within extremely small dimensions received extensive research efforts, as reviewed by Yun Xu, Dengxin Ji, Qiaoqiang Gan and co‐workers in article number 1800444. The cover image conceptually highlights representative designs of plasmonic metamaterial structures with extremely small features that are used to boost the light–matter interaction.
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