Open Access
SIS Quasiparticle Junctions As Microwave Photon Detectors
P. L. Richards,T. M. Shen,R. E. Harris,F. L. Lloyd +3 more
- Vol. 80, pp 17360
Reads0
Chats0
TLDR
In this article, the strong nonlinearity of the quasiparticle tunneling current in superconductor-insulator-superconductor junctions near the full gap voltage 2 Delta/e can be used for direct detection of microwave signals.Abstract:
: The strong nonlinearity of the quasiparticle tunneling current in superconductor-insulator-superconductor junctions near the full gap voltage 2 Delta/e can be used for direct detection of microwave signals Measurements at 36 GHz yielded a current responsivity of 3,5000 A/W, which is within a factor of 2 of the quantum limited value e/h-bar omega The measured NEP of 26 + or - 08 x 10 to the -16th power W/sq-rt Hz is the lowest value reported to date and can probably be improved significantly The experimental results are compared with both the standard classical analysis and photon assisted tunneling theory (Author)read more
Citations
More filters
Journal ArticleDOI
Superconductive devices for millimeter wave detection, mixing, and amplification
P. L. Richards,Tek-Ming Shen +1 more
TL;DR: In this paper, it was shown that a quasi-particle tunnel junction can be operated as a microwave photon detector with quantum efficiency close to unity or as a heterodyne mixer with conversion gain and with mixer noise temperature comparable with the quantum noise limit.
Journal Article
Terahertz Pioneers
TL;DR: This month the authors travel to Japan to speak with Dr. Hiromasa Ito, a longterm affiliate of the Research Institute of Electrical Communication, Tohoku University, Sendai, and a former Team Leader in Terahertz Photonics at Japan's premier science research institution, RIKEN.
Journal ArticleDOI
Computer simulations of the performance of quasiparticle heterodyne mixers
T.-M. Shen,P. Richards +1 more
TL;DR: In this article, the authors describe detailed computer simulations of SIS and SIN quasiparticle mixers and give predictions for conversion efficiency and noise for both devices as a function of operating frequency, bias voltage, RF source conductance and local oscillator power.
Journal ArticleDOI
Terahertz Pioneer: Paul L. Richards
TL;DR: Richards' own force of will, innate talents, and strong desire to take the path less trodden, placed him in a position to have such a profound and widespread impact on Terahertz science and the instrument and device technologies that are so commonly employed today throughout our field.
Book ChapterDOI
Superconducting Tunnel Junctions in High Frequency Radiation Detectors
TL;DR: In this paper, it is emphasized that it is the total system noise temperature that is the important entity and not only the square law video detector, but also other properties have also to be considered, such as the low pump power that is needed and maintenance of high power, high frequency local oscillators.