Study of the injection molding of a polarizing beam splitter.
We describe the replication of a relief grating that behaves like a polarizing beam splitter by injection molding. Measurements of the grating master, nickel shim, and replica, performed by atomic force microscopy, allow establishing a limit for the injection molding technique (currently used in CD fabrication) to aspect ratios of approximately 0.15. Although this limit strongly reduces the diffraction efficiency of the elements as well as their polarizing properties, extinction ratios of approximately 10:1 were measured for the replicas in a large range of wavelengths.
Jose de Carvalho
Edson
E
Departamento de Eletrônica e Microeletrônica-Faculdade de Engenharia Elétrica e de Computação-Universidade Estadual de Campinas, C.P. 6101, 13083-970 Campinas, Brasil.
Braga
Edmundo da Silva
Eda S
Cescato
Lucila H
LH