RT Journal Article
T1 Monochromatic aberrations in resonant optical elements applied to a focusing multilevel reflectarray
A1 Ginn, James
A1 Alda, Javier
A1 Gómez Pedrero, José Antonio
A1 Boreman, Glenn
AB The monochromatic aberrations produced by the phase distribution reflected by resonant sub-wavelength metallic structures are studied both analytically and numerically. Even for normal incidence, the angular dependence of the re-radiated wavefront disturbs the overall performance of the reflectarray. This effect is modelled as combination of a linear and a cubic dependence. A complete numerical simulation of a multilevel focusing reflectarray is performed using computational-electromagnetic and physical-optics-propagation methods. A modified Strehl ratio is defined to show the dependence of the focused spot behavior on aperture. The irradiance distribution is dependent on the polarization state. A small-aperture focusing reflectarray has been designed, fabricated, and tested. The irradiance distribution at the focusing plane is compared with the simulated one, showing a good agreement when residual wavefront aberrations are included.
PB OSA
SN 1094-4087
YR 2010
FD 2010-05
LK https://hdl.handle.net/20.500.14352/44988
UL https://hdl.handle.net/20.500.14352/44988
LA eng
NO © 2010 Optical Society of America. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modifications of the content of this paper are prohibited.
NO Ministerio de Ciencia e Innovacion
DS Docta Complutense
RD 17 jul 2025