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Your search keyword '"Leduc, Henry G."' showing total 13 results
Start Over Author "Leduc, Henry G." Journal applied physics letters
13 results on '"Leduc, Henry G."'

2. Frequency-domain multiplexing of SNSPDs with tunable superconducting resonators.

Author

Sypkens, Sasha, Minutolo, Lorenzo, Patel, Sahil, Knehr, Emanuel, Walter, Alexander B., Leduc, Henry G., Narváez, Lautaro, Chamberlin, Ralph, Jamison-Hooks, Tracee, Shaw, Matthew D., Day, Peter K., and Korzh, Boris

Subjects
SUPERCONDUCTING resonators, MULTIPLEXING, GRAPHICS processing units, SOFTWARE radio, REMOTE sensing, CRYSTAL oscillators
Abstract

This work culminates in a demonstration of an alternative frequency-domain multiplexing (FDM) scheme for superconducting nanowire single-photon detectors (SNSPDs) using the kinetic inductance parametric up-converter (KPUP) made out of NbTiN. There are multiple multiplexing architectures for SNSPDs that are already in use, but FDM could prove superior in applications where the operational bias currents are very low, especially for mid-infrared and far-infrared SNSPDs. Previous FDM schemes integrated the SNSPD within the resonator, while, in this work, we use an external resonator, which gives more flexibility to optimize the SNSPD architecture. The KPUP is a DC-biased superconducting λ /2 resonator that is sensitive to current perturbations. When coupled to an SNSPD, the KPUP can be used to read out current pulses on a few μA scale. The KPUP is made out of NbTiN, which has a large kinetic inductance and a high operating temperature. Meanwhile, the SNSPD is made from WSi, which is a popular material for broadband SNSPDs. A software-defined radio platform and a graphics processing unit are used to read out the KPUP and SNSPD array. Frequency-domain multiplexed SNSPDs have applications in astronomy, remote sensing, exoplanet science, dark matter detection, and quantum sensing. [ABSTRACT FROM AUTHOR]

Published
2024
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3. Wide-band parametric amplifier readout and resolution of optical microwave kinetic inductance detectors

Author

Zobrist, Nicholas, primary, Eom, Byeong Ho, additional, Day, Peter, additional, Mazin, Benjamin A., additional, Meeker, Seth R., additional, Bumble, Bruce, additional, LeDuc, Henry G., additional, Coiffard, Grégoire, additional, Szypryt, Paul, additional, Fruitwala, Neelay, additional, Lipartito, Isabel, additional, and Bockstiegel, Clint, additional

Published
2019
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4. Titanium nitride films for ultrasensitive microresonator detectors

Author

Leduc, Henry G., primary, Bumble, Bruce, additional, Day, Peter K., additional, Eom, Byeong Ho, additional, Gao, Jiansong, additional, Golwala, Sunil, additional, Mazin, Benjamin A., additional, McHugh, Sean, additional, Merrill, Andrew, additional, Moore, David C., additional, Noroozian, Omid, additional, Turner, Anthony D., additional, and Zmuidzinas, Jonas, additional

Published
2010
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13. Experimental evidence for a surface distribution of two-level systems in superconducting lithographed microwave resonators.

Author

Jiansong Gao, Daal, Miguel, Vayonakis, Anastasios, Kumar, Shwetank, Zmuidzinas, Jonas, Sadoulet, Bernard, Mazin, Benjamin A., Day, Peter K., and Leduc, Henry G.

Subjects
SUPERCONDUCTORS, LITHOGRAPHY, RESONATORS, NIOBIUM, TRANSITION metals, WAVEGUIDES
Abstract

We present measurements of the temperature-dependent frequency shift of five niobium superconducting coplanar waveguide microresonators with center strip widths ranging from 3 to 50 μm, taken at temperatures in the range of 100–800 mK, far below the 9.2 K transition temperature of niobium. These data agree well with the two-level system (TLS) theory. Fits to this theory provide information on the number of TLSs that interact with each resonator geometry. The geometrical scaling indicates a surface distribution of TLSs and the data are consistent with a TLS surface layer thickness of the order of a few nanometers, as might be expected for a native oxide layer. [ABSTRACT FROM AUTHOR]

Published
2008
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