Multi-chroic dual-polarization bolometric detectors for studies of the Cosmic Microwave Background
Creators
-
1.
University of California, Berkeley
-
2.
University of California, San Diego
-
3.
Lawrence Berkeley National Laboratory
-
4.
California Institute of Technology
Contributors
Others:
Abstract
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.
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.Attached Files
Published - Suzuki_2012p84523H.pdf
Files
Suzuki_2012p84523H.pdf
Additional details
Additional titles
- Alternative title
- Multichroic dual-polarization bolometric detectors for studies of the cosmic microwave background
Identifiers
- Eprint ID
- 49336
- Resolver ID
- CaltechAUTHORS:20140908-102931245
Funding
- NASA
- NNX10AC67G
Dates
- Created
-
2014-09-08Created from EPrint's datestamp field
- Updated
-
2021-11-10Created from EPrint's last_modified field
Caltech Custom Metadata
- Series Name
- Proceedings of SPIE
- Series Volume or Issue Number
- 8452