RT Journal Article
T1 Finite-difference time-domain simulation of low-F# Fresnel zone plates coupled to IR antennas
A1 Rico-García, José María
A1 López-Alonso, José Manuel
A1 Lail, Brian
A1 Boreman, Glenn
A1 Alda, Javier
AB 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.
PB SPIE
SN 0277-786X (ISBN: 0-8194-5565-2)
YR 2004
FD 2004-12-06
LK https://hdl.handle.net/20.500.14352/51660
UL https://hdl.handle.net/20.500.14352/51660
LA eng
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NO From Conference Volume 5612, Electro-Optical and Infrared Systems: Technology and Applications (ISBN: 0-8194-5565-2)Copyright 2004. Society of Photo Optical Instrumentation Engineers. 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 modification of the content of the paper are prohibited.
NO Ministerio de Ciencia y Tecnología de España
DS Docta Complutense
RD 27 abr 2024