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Analytical study of free-space coupling of THz radiation for a new radioastronomy receiver concept

Botello, Gabriel Santamaría and Abdalmalak, Kerlos Atia and Schlecht, Maria-Theresa and González-Ovejero, David and Sedlmeir, Florian and Schwefel, Harald G. L. and Malzer, Stefan and Weber, Heiko and Segovia-Vargas, Daniel and McCarthy, Darragh and Murphy, John Anthony and Döhler, Gottfried H. and García Muñoz, Luis-Enrique (2017) Analytical study of free-space coupling of THz radiation for a new radioastronomy receiver concept. In: 11th European Conference on Antennas and Propagation (EUCAP). IEEE , Piscataway, NJ, pp. 836-840. ISBN 978-8-8907-0187-0. https://resolver.caltech.edu/CaltechAUTHORS:20170524-163351689

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Abstract

In this paper, a scheme for coupling free-space THz radiation into a nonlinear whispering-gallery mode (WGM) resonator is presented. The purpose is to detect the weak THz radiation from the cosmic microwave background (CMB) by up-converting the signal into the optical domain via the nonlinearity of the medium. Such high-sensitivity receiver has theoretically shown capabilities towards photon counting at room temperature, however, it is critical to efficiently couple the THz radiation into the resonator. Therefore, by using the Schelkunoff-Waterman method (the so called T-matrix method) we perform an analytical evaluation of two different free-space coupling techniques: a freespace Gaussian beam, and a Gaussian beam incident in a silicon lens under total internal reflection. By comparing the excited modes in the resonator, the optimal parameters for each case are given.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.23919/EuCAP.2017.7928481DOIArticle
http://ieeexplore.ieee.org/document/7928481/PublisherArticle
Additional Information:© 2017 IEEE. This work has been financially supported by “DiDaCTIC: Desarrollo de un sistema de comunicaciones inalambrico en rango THz integrado de alta tasa de datos”, TEC2013-47753-C3, CAM S2013/ICE-3004 “DIFRAGEOS” projects, “Proyecto realizado con la Ayuda Fundacíon BBVA a Investigadores y Creadores Culturales 2016.” and “Estancias de movilidad de profesores PRX16/00021”.
Record Number:CaltechAUTHORS:20170524-163351689
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20170524-163351689
Official Citation:G. S. Botello et al., "Analytical study of free-space coupling of THz radiation for a new radioastronomy receiver concept," 2017 11th European Conference on Antennas and Propagation (EUCAP), Paris, France, 2017, pp. 836-840. doi: 10.23919/EuCAP.2017.7928481
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:77740
Collection:CaltechAUTHORS
Deposited By: Kristin Buxton
Deposited On:25 May 2017 16:29
Last Modified:03 Oct 2019 18:01

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