SIS Detectors for Terahertz Photon Counting System

Ezawa, H.; Matsuo, Hiroshi; Ukibe, Masahiro; Fujii, Go; Shiki, Shigetomo

doi:10.1007/s10909-015-1465-9

Cited by 7 publications

(5 citation statements)

References 15 publications

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“…Furthermore the idea suggested in Ref. [9] of applying the HBT interferometry to CMB photons has been taken seriously in [45,46]. According to these references it is not unconceivable that, in the future, bunched CMB photons could be identified and collected in the THz range.…”

Section: Counting Detectors For Single Cmb Photonsmentioning

confidence: 99%

“…It is not our purpose to review here the ideas related to photon counting THz interferometry (PCTI in the language of Ref. [46]) which is, in oversimplified terms, an advanced version of the HBT interferometry [46]. In what follows we shall instead focus the discussion on the definition of the various observables (i.e.…”

Section: Counting Detectors For Single Cmb Photonsmentioning

confidence: 99%

“…The considerations developed here suggest the interesting possibility that counting detectors for single CMB photons could provide the observational counterpart for the considerations developed in the previous sections. While it would naively seem totally hopeless to conceive and build this kind of detectors, a variety of cryogenic technologies are being developed [44][45][46] for CMB observation at THz (1 THz 10 GHz 3 = ) frequencies. Furthermore the idea suggested in [9] of applying the HBT interferometry to CMB photons has been taken seriously in [45,46].…”

Section: ( )mentioning

confidence: 99%

“…While it would naively seem totally hopeless to conceive and build this kind of detectors, a variety of cryogenic technologies are being developed [44][45][46] for CMB observation at THz (1 THz 10 GHz 3 = ) frequencies. Furthermore the idea suggested in [9] of applying the HBT interferometry to CMB photons has been taken seriously in [45,46]. According to these references it is not unconceivable that, in the future, bunched CMB photons could be identified and collected in the THz range.…”

Section: ( )mentioning

confidence: 99%

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Glauber theory and the quantum coherence of curvature inhomogeneities

Giovannini

2017

Class. Quantum Grav.

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The curvature inhomogeneities are systematically scrutinized in the framework of the Glauber approach. The amplified quantum fluctuations of the scalar and tensor modes of the geometry are shown to be first-order coherent while the interference of the corresponding intensities is larger than in the case of Bose-Einstein correlations. After showing that the degree of second-order coherence does not suffice to characterize unambiguously the curvature inhomogeneities, we argue that direct analyses of the degrees of third and fourthorder coherence are necessary to discriminate between different correlated states and to infer more reliably the statistical properties of the large-scale fluctuations. We speculate that the moments of the multiplicity distributions of the relic phonons might be observationally accessible thanks to new generations of instruments able to count the single photons of the Cosmic Microwave Background in the THz region.

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Section: Counting Detectors For Single Cmb Photonsmentioning

confidence: 99%

Section: Counting Detectors For Single Cmb Photonsmentioning

confidence: 99%

Section: ( )mentioning

confidence: 99%

Section: ( )mentioning

confidence: 99%

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Glauber theory and the quantum coherence of curvature inhomogeneities

Giovannini

2017

Class. Quantum Grav.

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“…Photon-assisted tunneling process of SIS junction is advantageous for its fast response. The development of the detectors is discussed in a separate paper [8]. Candidates include semiconductor or hot-electron direct detectors [9,10], whose sensitivities at terahertz frequencies are yet to be demonstrated.…”

Section: Terahertz Photon Counting Detectorsmentioning

confidence: 99%

Advantages of Photon Counting Detectors for Terahertz Astronomy

Matsuo

Ezawa

2016

J Low Temp Phys

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For astronomical observation at terahertz frequencies, a variety of cryogenic detector technologies are being developed to achieve background-limited observation from space, where a noise equivalent power (NEP) of less than 10 −18 W/Hz 0.5 is often required. When each photon signal is resolved in time, the requirements on NEP are reduced and 1 ns time resolution corresponds to an NEP of approximately 10 −17 W/Hz 0.5 at THz frequencies. Furthermore, fast photon counting detectors have a high dynamic range to observe bright terahertz sources such as stars and active galactic nuclei. Applications of photon counting detector are discussed for cosmic microwave background and photon counting terahertz interferometry.

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