H. G. LeDuc
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View article: Magnetic-Field and Temperature Limits of a Kinetic-Inductance Traveling-Wave Parametric Amplifier
Magnetic-Field and Temperature Limits of a Kinetic-Inductance Traveling-Wave Parametric Amplifier Open
Kinetic-inductance traveling-wave parametric amplifiers (KI-TWPAs) offer broadband near-quantum-limited amplification with high saturation power. Due to the high critical magnetic fields of high-kinetic-inductance materials, KI-TWPAs shoul…
View article: Lens based Kinetic Inductance Detectors with Distributed Dual Polarised Absorbers for Far Infra-red Space-based Astronomy
Lens based Kinetic Inductance Detectors with Distributed Dual Polarised Absorbers for Far Infra-red Space-based Astronomy Open
Future space-based far infra-red astronomical observations require background limited detector sensitivities and scalable focal plane array solutions to realise their vast potential in observation speed. In this work, a focal plane array o…
View article: A Millimeter-Wave Photometric Camera for Long-Range Imaging Through Optical Obscurants Using Kinetic Inductance Detectors
A Millimeter-Wave Photometric Camera for Long-Range Imaging Through Optical Obscurants Using Kinetic Inductance Detectors Open
Passive imaging through optical obscurants is a promising application for mm-wave sensing. We have thus developed the Superconducting Kinetic Inductance Passive Radiometer (SKIPR), a 150 GHz polarization-sensitive photometric camera optimi…
View article: A 25-micrometer Single-Photon-Sensitive Kinetic Inductance Detector
A 25-micrometer Single-Photon-Sensitive Kinetic Inductance Detector Open
We report measurements characterizing the performance of a kinetic inductance detector array designed for a wavelength of 25 microns and very low optical background level suitable for applications such as a far-infrared instrument on a cry…
View article: Metal-Mesh Linear Variable Filter for Far-Infrared Wavelengths
Metal-Mesh Linear Variable Filter for Far-Infrared Wavelengths Open
Future far-infrared (IR) observatories require compact and cost efficient optical linear variable bandpass filters (LVBFs) to define their instrument spectral bands. We have designed novel far-IR LVBFs that consist of metal-mesh bandpass f…
View article: A 4–8 GHz kinetic inductance traveling-wave parametric amplifier using four-wave mixing with near quantum-limited noise performance
A 4–8 GHz kinetic inductance traveling-wave parametric amplifier using four-wave mixing with near quantum-limited noise performance Open
Kinetic inductance traveling-wave parametric amplifiers (KI-TWPAs) have a wide instantaneous bandwidth with a near quantum-limited noise performance and a relatively high dynamic range. Because of this, they are suitable readout devices fo…
View article: Frequency-domain multiplexing of SNSPDs with tunable superconducting resonators
Frequency-domain multiplexing of SNSPDs with tunable superconducting resonators Open
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 NbTi…
View article: A Near Quantum Limited Sub-GHz TiN Kinetic Inductance Traveling Wave Parametric Amplifier Operating in a Frequency Translating Mode
A Near Quantum Limited Sub-GHz TiN Kinetic Inductance Traveling Wave Parametric Amplifier Operating in a Frequency Translating Mode Open
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 k…
View article: A 25-micron single photon sensitive kinetic inductance detector
A 25-micron single photon sensitive kinetic inductance detector Open
We report measurements characterizing the performance of a kinetic inductance detector array designed for a wavelength of 25 microns and very low optical background level suitable for applications such as a far-infrared instrument on a cry…
View article: A 4-8 GHz Kinetic Inductance Travelling-Wave Parametric Amplifier Using Four-Wave Mixing with Near Quantum-Limit Noise Performance
A 4-8 GHz Kinetic Inductance Travelling-Wave Parametric Amplifier Using Four-Wave Mixing with Near Quantum-Limit Noise Performance Open
Kinetic inductance traveling-wave parametric amplifiers (KI-TWPA) have a wide instantaneous bandwidth with near quantum-limited performance and a relatively high dynamic range. Because of this, they are suitable readout devices for cryogen…
View article: Significant noise improvement in a Kinetic Inductance Phonon-Mediated detector by use of a wideband parametric amplifier
Significant noise improvement in a Kinetic Inductance Phonon-Mediated detector by use of a wideband parametric amplifier Open
Microwave Kinetic Inductance Detectors (MKIDs) have been demonstrated as capable phonon sensors when coupled to crystalline substrates, and have been proposed as detectors for next-generation rare-event searches such as for the direct dete…
View article: Frequency-domain multiplexing of SNSPDs with tunable superconducting resonators
Frequency-domain multiplexing of SNSPDs with tunable superconducting resonators Open
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 NbTi…
View article: Parallel-Plate Capacitor Titanium Nitride Kinetic Inductance Detectors for Infrared Astronomy
Parallel-Plate Capacitor Titanium Nitride Kinetic Inductance Detectors for Infrared Astronomy Open
The Balloon Experiment for Galactic INfrared Science (BEGINS) is a concept for a sub-orbital observatory that will operate from $λ$ = 25-250 $μ$m to characterize dust in the vicinity of high-mass stars. The mission's sensitivity requiremen…
View article: Plasma-enhanced atomic layer deposition of titanium nitride for superconducting devices
Plasma-enhanced atomic layer deposition of titanium nitride for superconducting devices Open
This study presents a comprehensive investigation into the exceptional superconducting attributes of titanium nitride (TiN) achieved through plasma-enhanced atomic layer deposition (PEALD) on both planar and intricate three-dimensional (3D…
View article: Characterization of a Far-Infrared Kinetic Inductance Detector Prototype for PRIMA
Characterization of a Far-Infrared Kinetic Inductance Detector Prototype for PRIMA Open
The PRobe far-Infrared Mission for Astrophysics (PRIMA) is under study as a potential far-IR space mission, featuring actively cooled optics, and both imaging and spectroscopic instrumentation. To fully take advantage of the low background…
View article: High-sensitivity Kinetic Inductance Detector Arrays for the Probe Far-Infrared Mission for Astrophysics
High-sensitivity Kinetic Inductance Detector Arrays for the Probe Far-Infrared Mission for Astrophysics Open
Far-infrared (far-IR) astrophysics missions featuring actively cooled telescopes will offer orders of magnitude observing speed improvement at wavelengths where galaxies and forming planetary systems emit most of their light. The PRobe far…
View article: Parallel Plate Capacitor Aluminum KIDs for Future Far-Infrared Space-Based Observatories
Parallel Plate Capacitor Aluminum KIDs for Future Far-Infrared Space-Based Observatories Open
Future space-based far-infrared astrophysical observatories will require exquis-itely sensitive detectors consistent with the low optical backgrounds. The PRobe far-Infrared Mission for Astrophysics (PRIMA) will deploy arrays of thousands …
View article: Demonstration of a Quantum Noise Limited Traveling-Wave Parametric Amplifier
Demonstration of a Quantum Noise Limited Traveling-Wave Parametric Amplifier Open
Recent progress in quantum computing and the development of novel detector technologies for astrophysics is driving the need for high-gain, broadband, and quantum-limited amplifiers. We present a purely traveling-wave parametric amplifier …
View article: Data for the article: "A quantum electromechanical interface for long-lived phonons"
Data for the article: "A quantum electromechanical interface for long-lived phonons" Open
The data used for generating the figures in the article: "A quantum electromechanical interface for long-lived phonons".
View article: Data for the article: "A quantum electromechanical interface for long-lived phonons"
Data for the article: "A quantum electromechanical interface for long-lived phonons" Open
The data used for generating the figures in the article: "A quantum electromechanical interface for long-lived phonons".
View article: Wideband Direct Detection Constraints on Hidden Photon Dark Matter with the QUALIPHIDE Experiment
Wideband Direct Detection Constraints on Hidden Photon Dark Matter with the QUALIPHIDE Experiment Open
We report direction detection constraints on the presence of hidden photon dark matter with masses between 20-30 ueV using a cryogenic emitter-receiver-amplifier spectroscopy setup designed as the first iteration of QUALIPHIDE (QUantum LIm…
View article: Strong kinetic-inductance Kerr nonlinearity with titanium nitride nanowires
Strong kinetic-inductance Kerr nonlinearity with titanium nitride nanowires Open
Thin films of disordered superconductors such as titanium nitride (TiN) exhibit large kinetic inductance (KI), high critical temperature, and large quality factors at the single-photon level. KI nonlinearity can be exploited as an alternat…
View article: Improving the dynamic range of single photon counting kinetic inductance detectors
Improving the dynamic range of single photon counting kinetic inductance detectors Open
We develop a simple coordinate transformation which can be employed to compensate for the nonlinearity introduced by a Microwave Kinetic Inductance Detector's (MKID) homodyne readout scheme. This coordinate system is compared to the canoni…
View article: Upgrading the field-imaging far-infrared line spectrometer for the Stratospheric Observatory for Infrared Astronomy (SOFIA) with KIDs: enabling large sample (extragalactic) surveys
Upgrading the field-imaging far-infrared line spectrometer for the Stratospheric Observatory for Infrared Astronomy (SOFIA) with KIDs: enabling large sample (extragalactic) surveys Open
We present the initial design, performance improvements and science opportunities for an upgrade to the Field-Imaging Far-Infrared Line Spectrometer (FIFI-LS). FIFI-LS efficiently measures fine structure cooling lines, delivering critical …
View article: A millimeter-wave kinetic inductance detector camera for long-range imaging through optical obscurants
A millimeter-wave kinetic inductance detector camera for long-range imaging through optical obscurants Open
Millimeter-wave imaging provides a promising option for long-range target detection through optical obscurants such as fog, which often occur in marine environments. Given this motivation, we are currently developing a 150 GHz polarization…
View article: Full-Array Noise Performance of Deployment-Grade SuperSpec mm-Wave On-Chip Spectrometers
Full-Array Noise Performance of Deployment-Grade SuperSpec mm-Wave On-Chip Spectrometers Open
View article: Extending KIDs to the Mid-IR for Future Space and Suborbital Observatories
Extending KIDs to the Mid-IR for Future Space and Suborbital Observatories Open
View article: Progress towards ultra sensitive KIDs for future far-infrared missions: a focus on recombination times
Progress towards ultra sensitive KIDs for future far-infrared missions: a focus on recombination times Open
Future generations of far-infrared (FIR) telescopes will need detectors with noise-equivalent powers on the order of 5x10-20 W/Hz1/2 in order to be photon background limited by astrophysical sources. One such mission …
View article: The design and characterization of a 300 channel, optimized full-band millimeter filterbank for science with SuperSpec
The design and characterization of a 300 channel, optimized full-band millimeter filterbank for science with SuperSpec Open
SuperSpec is an integrated, on-chip spectrometer for millimeter and sub-millimeter astronomy. We report the approach, design optimization, and partial characterization of a 300 channel filterbank covering the 185 to 315 GHz frequency band …
View article: Development of Aluminum LEKIDs for Balloon-Borne Far-IR Spectroscopy
Development of Aluminum LEKIDs for Balloon-Borne Far-IR Spectroscopy Open