title: Three-dimensional finite difference split-step nonparaxial beam propagation method: new method for splitting of operators.
abstract: We present a new method for splitting of operators in the three-dimensional finite difference split-step nonparaxial beam propagation method. The method increases the accuracy and the efficiency in terms of speed and memory requirements for three-dimensional wide-angle beam propagation. It also makes the application of the perfectly matched layer (PML) boundary condition very simple.
authors.affiliation: Department of Physics, Indian Institution of Technology Delhi, New Delhi-110016, India.
authors.forename: Debjani
authors.initials: D
authors.lastname: Bhattacharya
authors.forename: Anurag
authors.initials: A
authors.lastname: Sharma