Antenna-coupled transition-edge hot-electron microbolometers

Ali, Shehzad; Timbie, Peter; Malu, Siddharth; McCammon, D.; Nelms, K. L.; Pathak, Rashmi; Weide, Daniel W. van der; Allen, Christine A.; Abrahams, J.; Chervenak, James A.; Hsieh, Wen‐Ting; Miller, Timothy M.; Moseley, S. H.; Stevenson, Thomas; Wollack, Edward J.

doi:10.1117/12.552836

Cited by 5 publications

(2 citation statements)

References 14 publications

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“…14 Another significant advantage of microstrip-coupled bolometer geometry is that the thermalization time constant is much shorter than the external (bolometer) time constant, providing excellent thermal efficiency. 3,15 While in theory small-volume bolometers might someday provide lower noise equivalent power (NEP) at a higher physical temperature, 16,17 a micro-machined mechanically-isolated bolometer allows the characteristics of the termination, the thermistor, and the thermal conductance to be optimized independently. State-of-the-art photolithography can now reliably produce silicon nitride legs with extremely high aspect ratio.…”

Section: The Tes Bolometermentioning

confidence: 99%

Antenna-coupled TES bolometers for CMB polarimetry

et al. 2006

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We have developed a completely lithographic antenna-coupled bolometer for CMB polarimetry. The necessary components of a millimeter wave radiometer -a beam forming element, a band defining filter, and the TES detectors -are fabricated on a silicon chip with photolithography. The densely populated antennas allow a very efficient use of the focal plane area. We have fabricated and characterized a series of prototype devices. We find that their properties, including the frequency and angular responses, are in good agreement with the theoretical expectations. The devices are undergoing optimization for upcoming CMB experiments.

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Section: The Tes Bolometermentioning

confidence: 99%

Antenna-coupled TES bolometers for CMB polarimetry

et al. 2006

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“…The absorber has a resistance of 17 . Fabrication details and previous measurements of this test device can be found in the literature [8,9].…”

Section: The Test Devicementioning

confidence: 99%

Sensitivity Measurements of a Transition-Edge Hot-Electron Microbolometer for Millimeter-Wave Astrophysical Observations

et al. 2008

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Future experiments to probe the Cosmic Microwave Background (CMB) polarization will need arrays of 1000s of sensitive bolometers. We are developing a Transition-edge Hot-electron Microbolometer (THM) to fill this need. This small-volume bolometer consists of a superconducting bilayer Transition-Edge Sensor (TES) with a thin-film absorber. Unlike traditional monolithic bolometers which make use of micromachined structures, the THM employs the decoupling between electrons and phonons at milliKelvin temperatures to provide thermal isolation. The devices are fabricated photolithographically and are easily integrated with antennas via microstrip transmission lines, and with SQUID readouts. We present the results of noise, responsivity, and thermal conductance measurements in which electrical power is dissipated in the absorber, and confirm a thermal model for a test THM with a Mo/Au TES and Bi/Au absorber.

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