Fourier Optics for the Analysis of Distributed Absorbers Under THz Focusing Systems

Journal article (2015)

Authors

Nuria Llombart Tera-Hertz Sensing - EEMCS
B. Blazquez Valles Tera-Hertz Sensing - EEMCS
Angelo Freni Tera-Hertz Sensing - EEMCS
A. Neto Tera-Hertz Sensing - EEMCS
Research Group
Tera-Hertz Sensing (EEMCS) (TU Delft)
Copyright: © 2015 Nuria Llombart, B. Blazquez Valles, Angelo Freni, A. Neto
DOI: https://doi.org/10.1109/TTHZ.2015.2439511
More Info
expand_more

Published Date

2015

Language

English

Reuse Rights

Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.

Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Microelectronics

Research Group

Tera-Hertz Sensing

Abstract

An analytical spectral model able to accurately and efficiently characterize absorbers distributed in the focal plane of focusing THz systems is presented. The model is obtained by using a Fourier optics representation of the electromagnetic field in the focal plane in conjunction with a recently developed equivalent network representation for the interaction of plane waves with distributed absorbers. The model is validated by comparisons with numerical full-wave simulations. Finally, the model is used to design a few architectures based on lens-coupled Kinetic Inductance Detectors (KIDs), which show high absorption efficiency over a
large bandwidth.