A bolometer array for the SPEctral Energy Distribution (SPEED)Camera

Silverberg, R. F.; Campano, B.; Chen, Tina C.; Cheng, E. S.; Cottingham, D. A.; Crawford, T. M.; Downes, T. P.; Finkbeiner, F. M.; Fixsen, D. J.; Logan, Daniel W.; Meyer, S. S.; Perera, Thushara; Sharp, Elmer H.; Wilson, Grant

doi:10.1117/12.552477

Cited by 3 publications

(1 citation statement)

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“…The SPEctral Energy Distribution (SPEED) camera, 2,3 scheduled for commissioning in spring 2007, will be the first instrument to make use of FSB technology. SPEED will have four focal plane pixels, each sensitive to four separate frequency bands centered around 148, 219, 271, and 361 GHz.…”

Section: Introductionmentioning

confidence: 99%

Optical performance of frequency-selective bolometers

et al. 2006

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Frequency-selective bolometers (FSBs) are a new type of detector for millimeter and submillimeter wavelengths that are transparent to all but a narrow range of frequencies as set by characteristics of the absorber itself. Therefore stacks of FSBs tuned to different frequencies provide a low-loss compact method for utilizing a large fraction of the light collected by a telescope. Tests of prototype FSBs indicate that the absorption spectra are well predicted by models, that peak absolute absorption efficiencies of the order of 50% are attainable, and that their out-of-band transmission is high.

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Section: Introductionmentioning

confidence: 99%

Optical performance of frequency-selective bolometers

et al. 2006

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Millimeter-Wave Lumped Element Superconducting Bandpass Filters for Multi-Color Imaging

Kumar

Vayonakis

Leduc

et al. 2009

IEEE Trans. Appl. Supercond.

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Abstract-The opacity due to water vapor in the Earth's atmosphere obscures portions of the sub-THz spectrum (mm/sub-mm wavelengths) to ground based astronomical observation. For maximum sensitivity, instruments operating at these wavelengths must be designed to have spectral responses that match the available windows in the atmospheric transmission that occur in between the strong water absorption lines. Traditionally, the spectral response of mm/sub-mm instruments has been set using optical, metal-mesh bandpass filters [1]. An alternative method for defining the passbands, available when using superconducting detectors coupled with planar antennas, is to use on-chip, superconducting filters [2]. This paper presents the design and testing of superconducting, lumped element, on-chip bandpass filters (BPFs), placed inline with the microstrip connecting the antenna and the detector, covering the frequency range from 209-416 GHz. Four filters were designed with pass bands 209-274 GHz, 265-315 GHz, 335-361 GHz and 397-416 GHz corresponding to the atmospheric transmission windows. Fourier transform spectroscopy was used to verify that the spectral response of the BPFs is well predicted by the computer simulations. Two-color operation of the pixels was demonstrated by connecting two detectors to a single broadband antenna through two BPFs. Scalability of the design to multiple (four) colors is discussed.

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Coupled-mode theory for infrared and submillimeter wave detectors

2007

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We present a comprehensive, spatiotemporal, modal theory of submillimeter-wave and far-infrared power detectors. The theory is based on the contraction of the coherence tensor of the light with another coherence tensor that incorporates all of the physics of the detector. The theory is extremely general and applies to detectors of any bandwidth, with light in any state of polarization and spatiotemporal coherence. The theory applies equally to quasi-monochromatic and pulsed systems. We show that the tensor associated with the detector is a measureable quantity and outline a procedure for its experimental determination. We derive expressions for the statistical properties of a detector's output, including the correlations between the outputs of different detectors, say, in an array or interferometer. The theory provides a clear conceptual understanding of how any general detector couples to the modes of an optical system and thereby provides a powerful and flexible way of modeling the behavior of detectors and instruments.

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A bolometer array for the SPEctral Energy Distribution (SPEED)Camera

Cited by 3 publications

References 0 publications

Optical performance of frequency-selective bolometers

Optical performance of frequency-selective bolometers

Millimeter-Wave Lumped Element Superconducting Bandpass Filters for Multi-Color Imaging

Coupled-mode theory for infrared and submillimeter wave detectors

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