Santamaría Botello, Gabriel 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 Murphy, J.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:
2017 11th European Conference on Antennas and Propagation (EUCAP).
IEEE, pp. 836-840.
ISBN 978-8-8907-0187-0
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 frees-pace 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
|
| Additional Information: |
This paper was presented at The 11th European Conference on Antennas and Propagation, Paris, France, on 19-24 March 2017. |
| Keywords: |
Optical resonators;
Manganese;
Couplings;
Optical receivers;
Nonlinear optics;
Optical pumping;
Optical surface waves;
matrix algebra;
radioastronomy;
radiofrequency cosmic radiation;
terahertz waves;
whispering gallery modes;
free-space coupling techniques;
THz radiation;
radioastronomy receiver concept;
nonlinear whispering-gallery mode resonator;
WGM resonator;
cosmic microwave background;
CMB;
optical domain;
high-sensitivity receiver;
photon counting;
Schelkunoff-Waterman method;
T-matrix method;
analytical evaluation;
frees-pace Gaussian beam;
Gaussian beam incident;
silicon lens;
total internal reflection;
temperature 293 K to 298 K;
Cosmic microwave background;
THz;
photon-counting;
whispering-galley mode;
T-matrix; |
| Academic Unit: |
Faculty of Science and Engineering > Experimental Physics |
| Item ID: |
12016 |
| Identification Number: |
https://doi.org/10.23919/EuCAP.2017.7928481 |
| Depositing User: |
Dr. Anthony Murphy
|
| Date Deposited: |
12 Dec 2019 15:11 |
| Publisher: |
IEEE |
| Refereed: |
Yes |
| URI: |
|
| Use Licence: |
This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available
here |
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