Subwavelength resolution of the annular photonic crystal with negative refractionF. Xia, M. Yun, M. Liu, J. Liang, W. Kong and Y. WanJ. Eur. Opt. Soc.-Rapid Publ., 7 (2012) 12045DOI: https://doi.org/10.2971/jeos.2012.12045
