A bolometer array for the spectral energy distribution (SPEED) camera

Silverberg, R. F.; Ali, Shehzad; Bier, A.; Campano, B.; Chen, T.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.; O’Dell, Chris; Perera, Thushara; Sharp, Elmer H.; Timbie, Peter; Wilson, Grant

doi:10.1016/j.nima.2003.11.350

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…The main disadvantage of the described methods was in long time procedure of sequential sample scanning at different frequencies. A multispectral imaging system for millimeter wavelengths based on cascade of matrix absorbers was proposed in [21] for space researches. But this system operated at cryogenic temperatures.…”

Section: Introductionmentioning

confidence: 99%

Matrix Structure of Metamaterial Absorbers for Multispectral Terahertz Imaging

Kuznetsov¹,

Паулиш²,

Gelfand³

et al. 2012

PIER

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Abstract-A multispectral 24 × 24 bolometric matrix structure of terahertz (THz) absorbers operating at 0.3-0.4 THz was proposed and experimentally investigated. Each pixel of the structure was implemented as a fragment of an ultra-thin metamaterial absorber. The matrix structure consisted of four types of pixels with nearly perfect absorptivity. Three pixels were at 0.30, 0.33, 0.36 THz respectively with identically oriented polarization sensitivity, and the fourth pixel was at 0.33 THz oriented with polarization sensitivity orthogonal to foregoing ones. The backside of the structure included a high-performance infrared emissive layer. Resonant absorption of THz radiation induced the structure heating and increasing IR emission from the emissive layer, which was henceforth detected by the IR camera. The terahertz imaging system, capable to operate in real time, with spectral and polarization discrimination was demonstrated. The experimental results showed good spectral and polarization resolution together with acceptable spatial resolution.

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Section: Introductionmentioning

confidence: 99%

Matrix Structure of Metamaterial Absorbers for Multispectral Terahertz Imaging

Kuznetsov¹,

Паулиш²,

Gelfand³

et al. 2012

PIER

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“…This approach, however, has the disadvantage of preventing multi-color pixel operation, since the entire pixel array is irradiated by the same frequency band. Multicolor pixel operation is desirable for upcoming camera designs [3] H. G. LeDuc and P. K. Day are with the Jet Propulsion Laboratory, Pasadena, CA 91109 USA(e-mail: henry.g.leduc@jpl.nasa.gov; peter.k.day@jpl.nasa.gov).…”

Section: Introductionmentioning

confidence: 99%

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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Bolometric THz-to-IR converter for terahertz imaging

Kuznetsov

Паулиш

Gelfand

et al. 2011

Applied Physics Letters

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The quasi-optical bolometric converter of terahertz (THz) waves into infrared (IR) radiation is proposed and experimentally investigated. The converter includes an ultra-thin THz absorber (with a thickness 1/50 of the operating free-space wavelength) based on an artificial impedance surface with close to perfect resonant absorptivity at 0.3 THz and a high-performance IR emissive layer. Absorption of THz waves induces converter heating that yields enhancement of IR emission from the emissive layer. The experimental testing of the THz-to-IR converter demonstrates the applicability of a converter to THz imaging with spectral and polarization discrimination in real-time operation.

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A bolometer array for the spectral energy distribution (SPEED) camera

Cited by 3 publications

References 7 publications

Matrix Structure of Metamaterial Absorbers for Multispectral Terahertz Imaging

Matrix Structure of Metamaterial Absorbers for Multispectral Terahertz Imaging

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

Bolometric THz-to-IR converter for terahertz imaging

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