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.
Fourier Optics for the Analysis of Distributed Absorbers Under THz Focusing Systems / Llombart, N. ; Blazquez, B. ; Freni, A. ; Neto, A.. - In: IEEE TRANSACTIONS ON TERAHERTZ SCIENCE AND TECHNOLOGY. - ISSN 2156-342X. - STAMPA. - 5:(2015), pp. 573-583. [10.1109/TTHZ.2015.2439511]
Fourier Optics for the Analysis of Distributed Absorbers Under THz Focusing Systems
FRENI, ANGELO;
2015
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.
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