TY - RPRT TI - Numerical calculation of a converging vector electromagnetic wave diffracted by an aperture using Borgnis potentials. II. Application to the study of focal shift. AU - Xueen Wang AU - Zhaozhong Fan AU - Tiantong Tang PY - 2006 DO - 10.1364/josaa.23.001326 UR - https://pubmed.ncbi.nlm.nih.gov/16715150/ ID - 16715150 ER -