Key Laboratory of In‑Fiber Integrated Optics;
College of Physics and Optoelectronic Engineering;
Harbin Engineering University;
Harbin 150001;
People’s Republic of China;
College of Materials Science and Chemical Engineering;
Harbin Engineering University;
Harbin 150001;
People’s Republic of China;
School of Materials Science and Engineering;
Zhengzhou University;
Zhengzhou 450001;
People’s Republic of China;
Metal single atoms; Dielectric loss behavior; NaCl-templating method; Lightweight absorbers; Honeycomb-like N-doped nanocarbons;