Achromatic half-wave plate for submillimeter instruments in cosmic microwave background astronomy: modeling and simulation

Savini, Giorgio, Pisano, Giampaolo ORCID: https://orcid.org/0000-0003-4302-5681 and Ade, Peter A. R. ORCID: https://orcid.org/0000-0002-5127-0401 2006. Achromatic half-wave plate for submillimeter instruments in cosmic microwave background astronomy: modeling and simulation. Applied Optics 45 (35) , pp. 8907-8915. 10.1364/AO.45.008907

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Abstract

We adopted an existing formalism and modified it to simulate, with high precision, the transmission, reflection, and absorption of multiple-plate birefringent devices as a function of frequency. To validate the model, we use it to compare the measured properties of an achromatic five-plate device with a broadband antireflection coating to expectations derived from the material optical constants and its geometric configuration. The half-wave plate presented here is observed to perform well with a phase shift variation of <2° from the ideal 180° over a bandwidth of Δν/ν∼1 at millimeter wavelengths. This formalism represents a powerful design tool for birefringent polarization modulators and enables its optical properties to be specified with high accuracy.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QB Astronomy
Publisher:	Optical Society of America
ISSN:	0003-6935
Last Modified:	25 Oct 2022 09:52
URI:	https://orca.cardiff.ac.uk/id/eprint/60364

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