Abstract
We present recent optical and thermal characterizations of polarization sensitive mm-wave bolometers fabricated at Argonne National Lab. The devices are designed to measure the polarization of the Cosmic Microwave Background and consist of a Mo/Au TES suspended on SiN with a Pd-Au dipole absorber. The detector performance is excellent with >85% co-polar coupling, <1% cross-polar leakage, 36 GHz optical bandwidth, electrothermal loop gains of approximately 10, and NEP ≃50 aW Hz−1/2.
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Acknowledgements
Work at the University of Chicago is supported by grants from the NSF (awards ANT-0638937 and PHY-0114422), the Kavli Foundation, and the Gordon and Betty Moore Foundation. The work at Argonne National Laboratory, including the use of facility at the Center for Nanoscale Materials (CNM), was supported by the Office of Science (Basic Energy Sciences and High Energy Physics) of the US Department of Energy. Technical support from Nanofabrication Group at the CNM, Argonne National Laboratory, is gratefully acknowledged.
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Chang, C.L., Ade, P., Aird, K. et al. Optical and Thermal Properties of ANL/KICP Polarization Sensitive Bolometers for SPTpol. J Low Temp Phys 167, 865–871 (2012). https://doi.org/10.1007/s10909-012-0491-0
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DOI: https://doi.org/10.1007/s10909-012-0491-0