A Near Quantum Limited Sub-GHz TiN Kinetic Inductance Traveling Wave Parametric Amplifier Operating in a Frequency Translating Mode

• URL: http://arxiv.org/abs/2406.00530v1
• Date: Sat, 1 Jun 2024 18:45:14 GMT
• Title: A Near Quantum Limited Sub-GHz TiN Kinetic Inductance Traveling Wave Parametric Amplifier Operating in a Frequency Translating Mode
• Authors: Farzad Faramarzi, Sasha Sypkens, Ryan Stephenson, Byeong H. Eom, Henry Leduc, Saptarshi Chaudhuri, Peter Day,
• Abstract summary: kinetic-inductance traveling-wave parametric amplifier (KI-TWPA) for sub-GHz frequencies. Use of TiN as the nonlinear element allows for a reduction of the required pump power by roughly an order of magnitude relative to NbTiN. amplifier has the potential to enable high-sensitivity and high-speed measurements in a wide range of applications.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We present the design and experimental characterization of a kinetic-inductance traveling-wave parametric amplifier (KI-TWPA) for sub-GHz frequencies. KI-TWPAs amplify signals through nonlinear mixing processes supported by the nonlinear kinetic inductance of a superconducting transmission line. The device described here utilizes a compactly meandered TiN microstrip transmission line to achieve the length needed to amplify sub-GHz signals. It is operated in a frequency translating mode where the amplified signal tone is terminated at the output of the amplifier, and the idler tone at approximately 2.5~GHz is brought out of the cryostat. By varying the pump frequency, a gain of up to 22 dB was achieved in a tunable range from about 450 to 850~MHz. Use of TiN as the nonlinear element allows for a reduction of the required pump power by roughly an order of magnitude relative to NbTiN, which has been used for previous KI-TWPA implementations. This amplifier has the potential to enable high-sensitivity and high-speed measurements in a wide range of applications, such as quantum computing, astrophysics, and dark matter detection.

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