Li, J.J.LiJIA-HAN LI2020-01-172020-01-172008https://scholars.lib.ntu.edu.tw/handle/123456789/451483Influence of granularity on the optical properties of a negative-refractive-index lensjournal article10.1103/PhysRevA.78.0158032-s2.0-48349144958https://www.scopus.com/inward/record.uri?eid=2-s2.0-48349144958&doi=10.1103%2fPhysRevA.78.015803&partnerID=40&md5=9b4d93e6df120cb6b70bbfcdaf85fc46