Abstract
We design a sub-gigahertz Josephson parametric amplifier for the readout of nanoscale calorimeters which consist of normal-metal-superconductor heterostructures. We characterize the amplifier performance at two operating points, 605 and 655 MHz, corresponding to reproducible local frequency maxima with respect to the applied magnetic flux. At the 655 MHz operating point, the device displays its maximum small-signal gain of 32 dB and gain-bandwidth product of 2π 3.3 MHz. The gain remains above 20 dB for incident powers up to -119 dBm. The added noise of the amplifier, determined by the hot/cold source method, assumes a minimum value of 0.2 K.
| Original language | English |
|---|---|
| Article number | 085001 |
| Journal | Superconductor Science and Technology |
| Volume | 30 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 27 Jun 2017 |
| MoE publication type | A1 Journal article-refereed |
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Keywords
- Josephson junction
- parametric amplifier
- SQUID array
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Lumped-element Josephson parametric amplifier at 650MHz for nano-calorimeter readout. / Vesterinen, Visa; Saira, Olli-Pentti; Räisänen, Ilmo; Möttönen, Mikko; Grönberg, Leif; Pekola, Jukka; Hassel, Juha.
In: Superconductor Science and Technology, Vol. 30, No. 8, 085001, 27.06.2017.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - Lumped-element Josephson parametric amplifier at 650MHz for nano-calorimeter readout
AU - Vesterinen, Visa
AU - Saira, Olli-Pentti
AU - Räisänen, Ilmo
AU - Möttönen, Mikko
AU - Grönberg, Leif
AU - Pekola, Jukka
AU - Hassel, Juha
N1 - Project code: 102135
PY - 2017/6/27
Y1 - 2017/6/27
N2 - We design a sub-gigahertz Josephson parametric amplifier for the readout of nanoscale calorimeters which consist of normal-metal-superconductor heterostructures. We characterize the amplifier performance at two operating points, 605 and 655 MHz, corresponding to reproducible local frequency maxima with respect to the applied magnetic flux. At the 655 MHz operating point, the device displays its maximum small-signal gain of 32 dB and gain-bandwidth product of 2π 3.3 MHz. The gain remains above 20 dB for incident powers up to -119 dBm. The added noise of the amplifier, determined by the hot/cold source method, assumes a minimum value of 0.2 K.
AB - We design a sub-gigahertz Josephson parametric amplifier for the readout of nanoscale calorimeters which consist of normal-metal-superconductor heterostructures. We characterize the amplifier performance at two operating points, 605 and 655 MHz, corresponding to reproducible local frequency maxima with respect to the applied magnetic flux. At the 655 MHz operating point, the device displays its maximum small-signal gain of 32 dB and gain-bandwidth product of 2π 3.3 MHz. The gain remains above 20 dB for incident powers up to -119 dBm. The added noise of the amplifier, determined by the hot/cold source method, assumes a minimum value of 0.2 K.
KW - Josephson junction
KW - parametric amplifier
KW - SQUID array
UR - http://www.scopus.com/inward/record.url?scp=85029518641&partnerID=8YFLogxK
U2 - 10.1088/1361-6668/aa73ed
DO - 10.1088/1361-6668/aa73ed
M3 - Article
VL - 30
JO - Superconductor Science and Technology
JF - Superconductor Science and Technology
SN - 0953-2048
IS - 8
M1 - 085001
ER -