[1] Liu Jian, Azzam R M A. Infrared quarter-wave reflection retarders designed with high-spatial-frequency dielectric surface-relief gratings on a gold substrate at oblique incidence. Appl. Opt., 1996, 35(28):5557~5562
[2] Howlader M M K, Azzam R M A. Periodic and quasiperiodic nonquarterwave multiplayer coatings for 90-deg reflection phase retardance at 45-deg angle of incidence. Opt. Engng., 1995, 34(3): 869~875
[3] Azzam R M A, Howlader M M K. Bilayer coatings that produce a 90° different reflection phase shift at oblique incidence: all possible solutions. The Solid Films, 1995, 272: 143~147
[4] Southwell W H. Multilayer coating design achieving a broadband 90° phase shift. Appl. Opt., 1980, 19(16): 2688~2692
[7] Apfel J H. Graphical method to design multiplayer phase retarders. Appl. Opt., 1981, 20(6): 1024~1029