Intermediate Frequency Bandwidth of a Hot-Electron Mixer: Comparison with Bolometric Models (2007)
Semenov, Alexei, Richter, Heiko, Pavlov, Sergey, Hübers, Heinz-Wilhelm, Il'in, Konstantin, Siegel, Michael, ...
The gain bandwidth of a superconducting NbN hot-electron mixer quasioptically coupled to radiation was evaluated in different operation conditions and compared to presently known bolometric mixer...
An energy-resolving superconducting nanowire photon counter (2007)
Semenov, Alexey, Haas, Philipp, Günther, Burghardt, Hübers, Heinz-Wilhelm, Il'in, Konstantin, Siegel, Michael, ...
We report on the energy-resolving capability of a superconducting NbN nanowire photon counter, which is read out by a superconducting quantum interference device. For counters operated at 6.5 K, a...
Spectral Sensistivity and Spectral Resolution of Superconducting Single-Photon Detectors (2007)
Haas, Philipp Moritz, Semenov, Alexei, Hübers, Heinz-Wilhelm, Beyer, Jörn, Kirste, Alexander, Schurig, Thomas, ...
Single photon detectors based on meanders from 5-nm thin B1 niobium nitride nanostrips show moderate spectral resolution along with the spectral cut-off of the quantum efficiency occurring in the...
Energy resolution and sensitivity of a superconducting quantum detector (2007)
Semenov, Alexey, Haas, Philipp, Il'in, Konstantin, Hübers, Heinz-Wilhelm, Siegel, Michael, Engel, Andreas, ...
Single-photon detectors from thin niobium nitride nanostrips show moderate energy resolution along with the cut-off of the quantum efficiency in the near-infrared spectral range. To describe the...
Engel, Andreas, Semenov, Alexey, Hübers, Heinz-Wilhelm, Il'in, Konstantin, Siegel, Michael
Superconducting thin films and micro- and nanostructured superconducting elements have enormous potential for applications in electronics and as highly sensitive detectors. We present recent studies...
Energieauflösung und spektrale Empfindlichkeit supraleitender Einzelphotonenzähler (2006)
Haas, Philipp Moritz, Semenov, Alexei, Hübers, Heinz-Wilhelm, Beyer, Jörn, Kirste, Alexander, Schurig, Thomas, ...
Hochempfindliche, ultraschnelle NbN-Einzelphotonenzähler, basierend auf der kurzzeitigen bias-stromunterstützten Ausbildung eines normal leitenden Bereichs (Hot-Spot) durch Photonenabsorption in...
Semenov, Alexey, Hübers, Heinz-Wilhelm, Il'in, Konstantin, Siegel, Michael
Auf dem elektronischen Nichtgleichgewicht basierende Detektoren sind wegen ihrer hohen Empfindlichkeit und Schnelligkeit bereits wichtiger Bestandteil vieler Anwendungen in Astronomie und...
Superconducting-normal metal bi-layers for antenna structures of hot-elektron detector (2006)
Stockhausen, Axel, Neuhaus, Manfred, Stassen, Alexander, Il'in, Konstantin, Siegel, Michael, Semenov, Alexey, ...
We have developed a quasi-optical version of a superconducting hot-electron detector (HED) suitable for application in the THz frequency range based on a sub-micron bridge made from ultra-thin...
NbN ultra-thin film Hot-Electron Detector for THZ application: Fabrication issues (2006)
Il'in, Konstantin, Stockhausen, Axel, Neuhaus, Manfred, Wermund, Hans-Jürgen, Siegel, Michael, Semenov, Alexey, ...
Superconducting Hot-Electron Detector (HED) is one of promising devices for a wide range of THz applications: astronomy, spectroscopy, imaging, and security. Actually HED is a rectangular strip of...
Evidence of non-bolometric mixing in the bandwidth of a hot-electron bolometer (2006)
Semenov, Alexey, Il'in, Konstantin, Siegel, Michael, Smirnov, Andrey, Pavlov, Sergey, Richter, Heiko, ...
The gain bandwidth of a superconducting NbN hot-electron mixer was measured at local oscillator (LO) frequencies 2.5 THz, 0.6 THz and 0.3 THz and compared to presently known bolometric mixer models....
Fluctuation effects in superconducting nanostrips (2006)
Engel, Andreas, Semenov, Alexey, Hübers, Heinz-Wilhelm, Il'in, Konstantin, Siegel, Michael
Superconducting fluctuations in long and narrow strips made from ultrathin NbN films, have been investigated. For large bias currents close to the critical current fluctuations led to localized,...
Noise Bolometer for Terahertz Waves (2006)
Semenov, Alexey, Richter, Heiko, Hübers, Heinz-Wilhelm, Il'in, Konstantin, Siegel, Michael
An advantage of superconducting detectors is a much lower noise in comparison to their semiconductor counterparts. We have studied the magnitude and spectrum of electric noise in thin superconducting...
Passive Terahertz Wave Imaging with a Single Bolometer and with a Bolometer Array (2006)
Semenov, Alexey, Richter, Heiko, Hübers, Heinz-WIlhelm, Zakosarenko, Vjatcheslav, May, Torsten, Anders, Susanne, ...
Detection of concealed threats like guns, knifes or explosives is of prime importance at airports and other public places. Passive millimetre wave (mmW) imagers operating at frequencies up to almost...
Semenov, Alexey, Richter, Heiko, Hübers, Heinz-Wilhelm, Zakosarenko, Vjatcheslav, May, Torsten, Anders, Susanne, ...
Detection of concealed threats is of prime importance for public security. In short range applications, passive imagers operating at millimeter wavelengths have been demonstrated to fulfill this...
Superconducting noise bolometer for terahertz radiation (2005)
Semenov, Alexey, Richter, Heiko, Hübers, Heinz-Wilhelm, Il'in, Konstantin, Siegel, Michael
We present a superconducting noise bolometer that is a bolometric detector sensing radiation via radiation-induced changes of its own microwave noise. The detector represents a nano-strip made from a...