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Wide-Range Bolometer with Transition Edge Sensor RF Readout


8/5/2014 at 11:00AM


8/5/2014 at 12:00PM


Stinson-Remick 100


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Alexei Orlov

Alexei Orlov

VIEW FULL PROFILE Email: aorlov@nd.edu
Phone: 574-631-8079
Website: http://www.nd.edu/~aorlov/
Office: 227 Stinson Remick Hall


College of Engineering Research Professor
Research Interests: My topics of research are experimental studies of nanostructures and nanodevices with main focus on experimental single electronics and nanomagnetics. This include single-electron devices used for sensors, memories and logic, quantum-dot cellular automata (electronic and ...
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To improve both scalability and noise filtering, a thin-film Transition Edge Sensor (TES) is suggested to embed into a high-Q planar GHz range resonator, while the resonator is weakly-coupled to a 50 Ohm readout transmission line. Such a TES element appears as a hot electron micro bolometer coupled to a THz range antenna with the resonator loaded at the same time. A weak signal coupled to the antenna heats the TES, thus reducing the Q-factor of the resonator and leading to a power increment in the readout line. The essential power-to-power conversion gain up to 10 and above is estimated. To prove the basic concept, we fabricated and tested a few submicron sized devices from Nb for operation temperatures starting at 5 K down to 1 K. The DC and RF characterization of the new device is made at a resonator frequency of about 5.8 GHz. A low-noise HEMT amplifier is used in our TES experiments without the need for a SQUID sensor. The optical sensitivity to a black-body radiation within the frequency band 600-700 GHz is measured as 2.7×10 14 W/Hz^(1/2) at Tc ≈ 5 K and ambient temperature ≈ 1.4 K. The extrapolation towards a lower transition temperature and smaller absorber sizes is promising to achieve NEP in the range of 10(19) W/Hz^(1/2).

Seminar Speaker:

Sergey V. Shitov

Sergey V. Shitov

Russian Academy of Sciences

Sergey V. Shitov received his Diploma degree in physics from Moscow State University, Moscow, USSR, in 1982. His research is focused on nonlinear superconductor devices for electronic applications: Ph.D thesis (1992) on practicable quantum-noise-limited SIS heterodyne mixers and receiver devices. He received Ph.D and Dr.Sci. degrees in physics and mathematics from the Institute of Radio-engineering and Electronics, Russian Academy of Sciences (IRE RAS), in 1992 and 2003, respectively. From 1992– 2004 he was a member of the Laboratory of Superconducting Devices for Signal Detection and Processing at IRE RAS, developing the Superconducting Integrated Receiver comprising a SIS mixer and a FFO Josephson oscillator along with a SQUID RF amplifier. From 2004–2009 he was on leave to the National Astronomical Observatory of Japan developing the ALMA Band-10 receiver system. His present research at IRE RAS includes superconducting ultra-low-noise, ultra-low-temperature detectors for radio astronomy and superconducting metamaterials at the National University of Science and Technology MISIS. He has authored over 100 technical papers.