Affiliation:
1. Nagaoka University of Technology
2. Hayashi Telempu Corporation
3. University of Hyogo
Abstract
A theoretical framework for determining biaxial anisotropy suitable for
reducing the incident angle dependence of a polarization grating is
proposed. The principal refractive indices are uniquely given by
quantifying the biaxial anisotropy through the
N
z
coefficient. The numerical analysis
based on the finite-difference time-domain method reveals that the
incident angle dependences of the diffraction efficiency and the
polarization ellipticity of the diffracted light are significantly
reduced when
N
z
=
0.5
. This result is expected to
contribute to the design of polarization diffractive optical elements
and the development of anisotropic materials and structures.
Funder
Japan Science and Technology
Agency
Japan Society for the Promotion of
Science
Subject
Atomic and Molecular Physics, and Optics,Statistical and Nonlinear Physics