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Multi-chroic dual-polarization bolometric detectors for studies of the Cosmic Microwave Background

Suzuki, Aritoki and Arnold, Kam and Edwards, Jennifer and Engargiola, Greg and Ghribi, Adnan and Holzapfel, William and Lee, Adrian T. and Meng, Xiao Fan and Myers, Michael J. and O'Brient, Roger and Quealy, Erin and Rebeiz, Gabriel and Richards, Paul and Rosen, Darin and Siritanasak, Praween (2012) Multi-chroic dual-polarization bolometric detectors for studies of the Cosmic Microwave Background. In: Millimeter, Submillimiter, and Far-Infrared Detectors and Instrumentation for Astronomy VI. Proceedings of SPIE. No.8452. SPIE , Bellingham, WA, Art. No. 84523H. ISBN 978-0-8194-9153-4.

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We are developing multi-chroic antenna-coupled TES detectors for CMB polarimetry. Multi-chroic detectors in- crease the mapping speed per focal plane area and provide greater discrimination of polarized galactic foregrounds with no increase in weight or cryogenic cost. In each pixel, a silicon lens-coupled dual polarized sinuous antenna collects light over a two-octave frequency band. The antenna couples the broadband millimeter wave signal into microstrip transmission lines, and on-chip filter banks split the broadband signal into several frequency bands. Separate TES bolometers detect the power in each frequency band and linear polarization. We will describe the design and performance of these devices and present optical data taken with prototype pixels. Our measurements show beams with percent level ellipticity, percent level cross-polarization leakage, and partitioned bands using banks of 2, 3, and 7 filters. We will also describe the development of broadband anti-reflection coatings for the high dielectric constant lens. The broadband anti-reflection coating has approximately 100% bandwidth and no detectable loss at cryogenic temperature. Finally, we will describe an upgrade for the Polarbear CMB experiment and installation for the LiteBIRD CMB satellite experiment both of which have focal planes with kilo-pixel of these detectors to achieve unprecedented mapping speed.

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Alternate Title:Multichroic dual-polarization bolometric detectors for studies of the cosmic microwave background
Additional Information:© 2012 SPIE. Date Published: 5 October 2012. We acknowledge support from NASA through grant NNX10AC67G. Devices were fabricated at the Marvell Nanofabrication Laboratory at the University of California, Berkeley.
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Subject Keywords:CMB, Polarization, B-Mode, Broadband, TES Bolometer, Sinuous Antenna, Microstrip Filter, Anti-Reflection Coating
Series Name:Proceedings of SPIE
Issue or Number:8452
Record Number:CaltechAUTHORS:20140908-102931245
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:49336
Deposited By: Ruth Sustaita
Deposited On:08 Sep 2014 18:38
Last Modified:03 Oct 2019 07:12

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