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Multi-Chroic Dual-Polarization Bolometric Detectors for Studies of the Cosmic Microwave Background

Suzuki, A. and Arnold, K. and Edwards, J. and Engargiola, G. and Holzapfel, W. and Keating, B. and Lee, A. T. and Meng, X. F.. and Myers, M. J. and O'Brient, R. and Quealy, E. and Rebeiz, G. and Richards, P. L. and Rosen, D. and Siritanasak, P. (2014) Multi-Chroic Dual-Polarization Bolometric Detectors for Studies of the Cosmic Microwave Background. Journal of Low Temperature Physics, 176 (5-6). pp. 650-656. ISSN 0022-2291.

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We are developing multi-chroic antenna-coupled Transition Edge Sensor (TES) bolometer detectors for Cosmic Microwave Background (CMB) polarimetry. Multi-chroic detectors increase focal plane area efficiency, and thus the mapping speed per focal plane area, and provide greater discrimination against polarized galactic foregrounds with no increase in weight or cryogenic cost. In each pixel, a silicon lens-coupled dual-polarized sinuous antenna collects photons 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 multiple frequency bands. Separate TES bolometers detect the power in each frequency band and linear polarization state. We will describe the design and performance of these devices and present optical data taken. Our measurements of dual-polarization pixels in multiple frequency bands show beams with percent-level ellipticity, and percent-level cross-polarization leakage. We will also describe the development of large arrays of these multi-chroic pixels. Finally, we will describe kilo-pixel arrays of these detectors planned for the future CMB experiments that will achieve unprecedented mapping speed.

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Additional Information:© 2014 Springer Science+Business Media New York. Received: 16 July 2013. Accepted: 20 December 2013. Published online: 23 January 2014. We acknowledge support from the NASA, NASA grant NNG06GJ08G. Detectors were fabricated at Berkeley nanofabrication laboratory. Praween Siritanasak is supported by the Royal Thai Government fellowship.
Funding AgencyGrant Number
Royal Thai GovernmentUNSPECIFIED
Subject Keywords:Cosmic Microwave Background, B-mode, Broadband, Multichroic, Polarization, Anti-Reflectoin Coating
Issue or Number:5-6
Record Number:CaltechAUTHORS:20140905-090651302
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Official Citation:Suzuki, A., Arnold, K., Edwards, J. et al. J Low Temp Phys (2014) 176: 650. doi:10.1007/s10909-013-1049-5
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:49271
Deposited By: Ruth Sustaita
Deposited On:05 Sep 2014 17:05
Last Modified:03 Oct 2019 07:12

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