Broadband circular polarizer based on high-contrast gratings
Akosman, A. E.
Optical Society of America
2094 - 2096
Item Usage Stats
A circular polarizer, which is composed of periodic and two-dimensional dielectric high-contrast gratings, is designed theoretically such that a unity conversion efficiency is achieved at λ0 = 1.55 μm. The operation is obtained by the achievement of the simultaneous unity transmission of transverse magnetic and transverse electric waves with a phase difference of π/2, meaning that an optimized geometrical anisotropy is accomplished. By the utilization of the rigorous coupled-wave analysis and finite-difference time-domain methods, it is shown that a percent bandwidth of ∼50% can be achieved when the operation bandwidth is defined as the wavelengths for which the conversion efficiency exceeds 0.9.
Finite-difference time-domain (FDTD) methods
Rigorous coupled wave analysis
Transverse electric waves
Finite difference time domain method