Far-infrared band-pass grid filters

MacDonald, Michael E.; Grossman, Erich N.

doi:10.1117/12.262759

Cited by 2 publications

(4 citation statements)

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“…In order to select a frequency band of interest, a bandpass filter with a central frequency of about 300 GHz and Figure 4. Measured characteristics of the mesh filter, experimental points and fitting curves, based on the Laurent approximation [9] for a quartz substrate. The main transmission peak corresponds to the resonance length of crosses.…”

Section: Experiments Results and Analysismentioning

confidence: 99%

“…The CEB was tested in a He 3 sorption cryostat with a base temperature of 280 mK. In order to select a frequency band of interest, a bandpass filter with a central frequency of about 300 GHz and [9] for a quartz substrate. The main transmission peak corresponds to the resonance length of crosses.…”

Section: Experiments Results and Analysismentioning

confidence: 99%

“…Figure 4. Measured characteristics of the mesh filter, experimental points and fitting curves, based on the Laurent approximation[9] for a quartz substrate. The main transmission peak corresponds to the resonance length of crosses.…”

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confidence: 99%

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Optical response of a titanium-based cold-electron bolometer

Otto

Tarasov

Grimes

et al. 2013

Supercond. Sci. Technol.

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We present experimental results on the testing of cold-electron bolometer (CEB) detectors comprised of a thin Ti film absorber and two SIN junctions integrated with a planar antenna. The CEB performance was tested in a He 3 sorption cryostat HELIOX-AC-V at bath temperatures of 280-305 mK. The optical response was measured using the hot/cold load method by flipping a Cu reflector opposite a blackbody surface inside a 3 K shield and using a thermal source with variable temperature. In the first experiment, the detector chip was mounted in an optical sample-holder whose aperture was switched towards or away from a blackbody source changing the incident radiation temperature from 3 K to 270 mK. As a result, we measured the optical response to a 3 K/270 mK radiation temperature change. The measured voltage response value for the detector integrated in a double-dipole antenna was V out = 120 µV. This corresponds to a noise equivalent power of NEP = V n /(dV/dP) = 3.5 × 10 −17 W Hz −1/2 , where dV/dP is the voltage to power response obtained from the incoming power estimation based on the Planck formula.

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Section: Experiments Results and Analysismentioning

confidence: 99%

Section: Experiments Results and Analysismentioning

confidence: 99%

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Optical response of a titanium-based cold-electron bolometer

Otto

Tarasov

Grimes

et al. 2013

Supercond. Sci. Technol.

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“…The resonant frequency of the substrate-supported grids are shifted downward from the free-space value [9], as shown in Figs. 3 and 4.…”

Section: Filter Fabrication and Characterizationmentioning

confidence: 92%

Spectral transmittance of lossy printed resonant-grid terahertz bandpass filters

MacDonald

Alexanian

York

et al. 2000

IEEE Trans. Microwave Theory Techn.

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In this paper, we present terahertz bandpass filters composed of resonant arrays of crossed slots in lossy metal films deposited on dielectric membranes. The filters exhibit insertion loss as low as 1.9 dB at room temperature and 1.2 dB at 77 K at a center frequency of 2.2 THz. It is found that the dielectric substrate introduces a downward shift in frequency not predicted by standard mean dielectric-constant approximations. This shift is proportional to the permittivity and thickness of the substrate, and is accurately modeled for polyester, fused quartz and silicon substrates using a finite-difference time-domain (FDTD) model. It is also found that the insertion loss and-factors of the filters vary with the product of the thickness and conductivity of the metal film for lead and gold films, even in cases when the thickness is several skin depths at the center frequency. The FDTD theory presented here accounts for some of the conductor losses.

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Far-infrared band-pass grid filters

Cited by 2 publications

References 0 publications

Optical response of a titanium-based cold-electron bolometer

Optical response of a titanium-based cold-electron bolometer

Spectral transmittance of lossy printed resonant-grid terahertz bandpass filters

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