Abstract
| Original language | English |
|---|---|
| Article number | 276 |
| Journal | Scientific Reports |
| Volume | 2 |
| DOIs | |
| Publication status | Published - 2012 |
| MoE publication type | A1 Journal article-refereed |
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Keywords
- Applied physics
- electronic materials and devices
- quantum physics
- superconducting materials
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Josephson junction microwave amplifier in self-organized noise compression mode. / Lähteenmäki, P. (Corresponding Author); Vesterinen, Visa; Hassel, Juha; Seppä, Heikki; Hakonen, P.
In: Scientific Reports, Vol. 2, 276, 2012.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - Josephson junction microwave amplifier in self-organized noise compression mode
AU - Lähteenmäki, P.
AU - Vesterinen, Visa
AU - Hassel, Juha
AU - Seppä, Heikki
AU - Hakonen, P.
N1 - Project code: 72785
PY - 2012
Y1 - 2012
N2 - The fundamental noise limit of a phase-preserving amplifier at frequency is the standard quantum limit. In the microwave range, the best candidates have been amplifiers based on superconducting quantum interference devices (reaching the noise temperature at 700 MHz), and non-degenerate parametric amplifiers (reaching noise levels close to the quantum limit at 8 GHz). We introduce a new type of an amplifier based on the negative resistance of a selectively damped Josephson junction. Noise performance of our amplifier is limited by mixing of quantum noise from Josephson oscillation regime down to the signal frequency. Measurements yield nearly quantum-limited operation, at 2.8 GHz, owing to self-organization of the working point. Simulations describe the characteristics of our device well and indicate potential for wide bandwidth operation.
AB - The fundamental noise limit of a phase-preserving amplifier at frequency is the standard quantum limit. In the microwave range, the best candidates have been amplifiers based on superconducting quantum interference devices (reaching the noise temperature at 700 MHz), and non-degenerate parametric amplifiers (reaching noise levels close to the quantum limit at 8 GHz). We introduce a new type of an amplifier based on the negative resistance of a selectively damped Josephson junction. Noise performance of our amplifier is limited by mixing of quantum noise from Josephson oscillation regime down to the signal frequency. Measurements yield nearly quantum-limited operation, at 2.8 GHz, owing to self-organization of the working point. Simulations describe the characteristics of our device well and indicate potential for wide bandwidth operation.
KW - Applied physics
KW - electronic materials and devices
KW - quantum physics
KW - superconducting materials
U2 - 10.1038/srep00276
DO - 10.1038/srep00276
M3 - Article
VL - 2
JO - Scientific Reports
JF - Scientific Reports
SN - 2045-2322
M1 - 276
ER -