Work

Band-limited angular spectrum method for numerical simulation of free-space propagation in far and near fields

Year: 2009

Type: article

Abstract: A novel method is proposed for simulating free-space propagation. This method is an improvement of the angular spectrum method (AS). The AS does not include any approximation of the propagation distance, because the formula thereof is derived directly from the Rayleigh-Sommerfeld equation. However, the AS is not an all-round method, because it produces severe numerical errors due to a sampling problem of the transfer function even in Fresnel regions. The proposed method resolves this problem by limiting the bandwidth of the propagation field and also expands the region in which exact fields can be calculated by the AS. A discussion on the validity of limiting the bandwidth is also presented.

Source: Optics Express

DOI: 10.1364/oe.17.019662

Authors: Kyoji Matsushima, Tomoyoshi Shimobaba

Institutions: Kansai University, Chiba University

Language: English

Topic: Electromagnetic Simulation and Numerical Methods

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270

Funder: Japan Society for the Promotion of Science