Metal-mesh achromatic half-wave plate for use at submillimeter wavelengths

Pisano, Giampaolo ORCID: https://orcid.org/0000-0003-4302-5681, Savini, Giorgio, Ade, Peter A. R. ORCID: https://orcid.org/0000-0002-5127-0401 and Haynes, Vic 2008. Metal-mesh achromatic half-wave plate for use at submillimeter wavelengths. Applied Optics 47 (33) , p. 6251. 10.1364/AO.47.006251

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Abstract

A metal-mesh achromatic half-wave plate (HWP) has been designed, manufactured, and tested for potential use in millimeter and submillimeter astronomical instruments. The prototype device presented here is based on a 12-grid Shatrow [ IEEE Trans. Antennas Propag. 43, 109 (1995)] recipe to operate over the frequency range of 120–180 GHz . Transmission line modeling and finite-element analysis [Ansoft HFSS website: http://www.ansoft.com/hfss/ ] were used to optimize the design geometrical parameters in terms of the device transmission, reflection, absorption, phase-shift, and cross-polarization as a function of frequency. The resulting prototype device was constructed and characterized using incoherent radiation from a polarizing Fourier transform spectrometer to explore its frequency and polarization behavior. These measurements are shown to be in excellent agreement with the models. Lists of the achieved HWP performance characteristics are reported.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QC Physics
Publisher:	The Optical Society
ISSN:	0003-6935
Last Modified:	21 Oct 2022 08:47
URI:	https://orca.cardiff.ac.uk/id/eprint/34370

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