Finite-difference time-domain simulation of low-F# Fresnel zone plates coupled to IR antennas
Loading...
Official URL
Full text at PDC
Publication date
2004
Advisors (or tutors)
Editors
Journal Title
Journal ISSN
Volume Title
Publisher
SPIE
Citations
Exportar
Citation
Rico García,J. M., López Alonso, J. M., Lail, B. et al. «Finite-difference time-domain simulation of low-F# Fresnel zone plates coupled to IR antennas». Electro-Optical and Infrared Systems: Technology and Applications, vol. 5612, SPIE, 2004, pp. 216-26. www.spiedigitallibrary.org, https://doi.org/10.1117/12.579943.
Abstract
Fresnel Zone Plate Lenses (FZPLs) have been successfully coupled to infrared (IR) antennas producing a responsivity enhancement of about two orders of magnitude. However, their lateral extension may compromise their applicability in focal-plane-arrays (FPA) IR imagers, where the dimensions of the pixel are constrained by the FPA spacing. When designing optimum-gain FZPLs for FPAs, we are lead to the requirement of FZPLs operating at very low F/#s (marginal rays propagating at a large angle in image space). In this case, Finite-Difference Time-Domain techniques (FDTD) are used to refine the physical-optics modelling results, producing a result closer to the actual case encountered in a high-fill-factor FPA. In this contribution, we analyze the FZPL designs by using FDTD techniques. The main result of the FDTD computation is the gain factor defined as the ratio of the response of the IR antennas coupled with the FZPL, compared to the same antennas without the FZPL.
Description
From Conference Volume 5612, Electro-Optical and Infrared Systems: Technology and Applications (ISBN: 0-8194-5565-2)