Supported by the National Natural Science Foundation of China and Beijing National Research Center for Information Science and Technology,the research group led by Prof. Li Yue (李越) at the Electronic Engineering Department of Tsinghua University proposes the method of substrate-integrated photonic doping,and paves the pathway to the versatile near-zero-index (NZI) devices. The research result was published in Nature Communications (2019,10:4132).Epsilon-near-zero (ENZ) medium has drawn a great deal of attention,due to its novel wave phenomenon