Demonstration of the broadband half-wave plate using the nine-layer sapphire for the CMB polarization experiment

Kunimoto Komatsu; Tomotake Matsumura; Hiroaki Imada; Hirokazu Ishino; Nobuhiko Katayama; Yuki Sakurai

Demonstration of the broadband half-wave plate using the nine-layer sapphire for the CMB polarization experiment

Kunimoto Komatsu, Tomotake Matsumura, Hiroaki Imada, Hirokazu Ishino, Nobuhiko Katayama, Yuki Sakurai

Research output: Contribution to journal › Article › peer-review

Abstract

We report the development of the achromatic half-wave plate (AHWP) at millimeter wave for cosmic microwave background polarization experiments. We fabricate an AHWP consisting of nine A-cut sapphire plates based on the Pancharatnam recipe to cover a wide frequency range. The modulation efficiency and the phase are measured in a frequency range of 33 to 260 GHz with incident angles up to 10 degrees. We find the measurements at room temperature are in good agreement with the predictions. This is the most broadband demonstration of an AHWP at millimeter wave.

Original language	English
Journal	Journal of Astronomical Telescopes, Instruments, and Systems
Volume	5
Issue number	4
Publication status	Published - 2020

Keywords

Achromatic half-wave plate
B-mode
CMB polarization
Millimeter wave
Polarimetry
Space mission

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Control and Systems Engineering
Instrumentation
Astronomy and Astrophysics
Mechanical Engineering
Space and Planetary Science

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Demonstration of the broadband half-wave plate using the nine-layer sapphire for the CMB polarization experiment. / Komatsu, Kunimoto; Matsumura, Tomotake; Imada, Hiroaki; Ishino, Hirokazu; Katayama, Nobuhiko; Sakurai, Yuki.

In: Journal of Astronomical Telescopes, Instruments, and Systems, Vol. 5, No. 4, 2020.

Research output: Contribution to journal › Article › peer-review

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AU - Ishino, Hirokazu

AU - Katayama, Nobuhiko

AU - Sakurai, Yuki

PY - 2020

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KW - Millimeter wave

KW - Polarimetry

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