A5037335544- Superconducting and THz Device Technology
- Physics of Superconductivity and Magnetism
- Atomic and Subatomic Physics Research
- Photonic and Optical Devices
- Advanced MRI Techniques and Applications
- Quantum Information and Cryptography
- Gyrotron and Vacuum Electronics Research
- Quantum and electron transport phenomena
- Thermal Radiation and Cooling Technologies
- Mechanical and Optical Resonators
- Microwave Engineering and Waveguides
- Semiconductor Quantum Structures and Devices
- Magnetic Field Sensors Techniques
- Spacecraft and Cryogenic Technologies
- CCD and CMOS Imaging Sensors
- Radio Frequency Integrated Circuit Design
- Particle accelerators and beam dynamics
- Spacecraft Design and Technology
- Terahertz technology and applications
- GaN-based semiconductor devices and materials
- Superconducting Materials and Applications
- Radio Astronomy Observations and Technology
- Particle Detector Development and Performance
- Planetary Science and Exploration
- Advanced Semiconductor Detectors and Materials
Jet Propulsion Laboratory
2011-2025
California Institute of Technology
2008-2025
D-Wave Systems (Canada)
2015-2016
National Institute of Standards and Technology
2010
University of California, Santa Barbara
2010
University of Florida
2003-2004
Titanium nitride (TiNx) films are ideal for use in superconducting microresonator detectors because: a) the critical temperature varies with composition (0 < Tc 5 K); b) normal-state resistivity is large, \rho_n ~ 100 $\mu$Ohm cm, facilitating efficient photon absorption and providing a large kinetic inductance detector responsivity; c) TiN very hard mechanically robust. Resonators using reactively sputtered show remarkably low loss (Q_i > 10^7) have noise properties similar to resonators...
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 first iteration QUALIPHIDE (QUantum LImited PHotons In Dark Experiment). A metallic dish sources conversion photons from kinetic mixing onto horn antenna which is coupled to C-band inductance traveling wave parametric amplifier, providing for near quantum-limited noise performance. demonstrate probing...
If driven sufficiently strongly, superconducting microresonators exhibit nonlinear behavior including response bifurcation. This can arise from a variety of physical mechanisms heating effects, grain boundaries or weak links, vortex penetration, through the intrinsic nonlinearity kinetic inductance. Although used for photon detection are usually fairly hard in order to optimize their sensitivity, most experiments date have not explored detector performance beyond onset Here we present...
The energy resolution of a single photon counting Microwave Kinetic Inductance Detector (MKID) can be degraded by noise coming from the primary low temperature amplifier in detector's readout system. Until recently, quantum limited amplifiers have been incompatible with these detectors due to dynamic range, power, and bandwidth constraints. However, we show that kinetic inductance based traveling wave parametric used for this application reaches limit. total system scheme was equal ~2.1...
Large-scale arrays of Microwave Kinetic Inductance Detectors (MKIDs) are attractive candidates for use in imaging instruments next generation submillimeter-wave telescopes such as CCAT. We have designed and fabricated tightly packed ~250-pixel MKID using lumped-element resonators etched from a thin layer superconducting TiNx deposited on silicon substrate. The high pixel packing density our initial design resulted large microwave crosstalk due to electromagnetic coupling between the...
The nonlinear response associated with the current dependence of superconducting kinetic inductance was studied in capacitively shunted NbTiN microstrip transmission lines. It found that per unit length one line could be changed by up to 20% applying a dc current, corresponding single-pass time delay 0.7 ns. To investigate dissipation, Bragg reflectors were placed on either end section this type line, creating resonances over range frequencies. From change resonance linewidth and amplitude...
Kinetic inductance traveling-wave parametric amplifiers (KI-TWPAs) have a wide instantaneous bandwidth with near quantum-limited noise performance and relatively high dynamic range. Because of this, they are suitable readout devices for cryogenic detectors superconducting qubits variety applications in quantum sensing. This work discusses the design, fabrication, KI-TWPA based on four-wave mixing NbTiN microstrip transmission line. device amplifies signal band from 4 to 8 GHz without...
Passive imaging through optical obscurants is a promising application for mm-wave sensing. We have thus developed the Superconducting Kinetic Inductance Radiometer (SKIPR), 150 GHz polarization-sensitive photometric camera optimized terrestrial using focal plane array with 3,840 kinetic inductance detectors (KIDs). present full description of instrument design, particular emphasis on cryogenic system based Gifford-McMahon cryocooler two-stage Adiabatic Demagnetization Refrigerator and...
Passive imaging through optical obscurants is a promising application for mm-wave sensing. We have thus developed the Superconducting Kinetic Inductance Radiometer (SKIPR), 150 GHz polarization-sensitive photometric camera optimized terrestrial using focal plane array with 3840 kinetic inductance detectors (KIDs). present full description of instrument design, particular emphasis on cryogenic system based Gifford–McMahon cryocooler two-stage adiabatic demagnetization refrigerator and...
Future submillimeter telescopes will demand arrays with 10<sub>6</sub> pixels to fill the focal plane. MAKO is a 350 μm camera being developed demonstrate use of superconducting microresonators meet high multiplexing factors required for scaling large-format while offering background-limited single-pixel sensitivity. Candidate pixel designs must simultaneously many requirements. To achieve desired noise equivalent powers it efficiently absorb radiation, feature responsivity, and exhibit...
We report measurements characterizing the performance of a kinetic inductance detector array designed for wavelength 25 microns and very low optical background level suitable applications such as far-infrared instrument on cryogenically cooled space telescope. In pulse-counting mode operation at flux, detectors can resolve individual 25-micron photons. an integrating mode, remain photon noise limited over more than 6 orders magnitude in absorbed power from 70 zW to 200 fW, with limiting...
Submillimeter cameras now have up to 10<sup>4</sup> pixels (SCUBA 2). The proposed CCAT 25-meter submillimeter telescope will feature a 1 degree field-of-view. Populating the focal plane at 350 microns would require more than 10<sup>6</sup> photon-noise limited pixels. To ultimately achieve this scaling, simple detectors and high-density multiplexing are essential. We addressing long-term challenge through development of frequency-multiplexed superconducting microresonator detector arrays....
We are developing of arrays membrane isolated resonator-bolometers, each with a kinetic inductance device (KID) to measure the temperature membrane. The KIDs fabricated out high superconductor YBCO allow operation at relatively temperatures. bolometers designed offer higher sensitivity than sensors operating 300 K, but they require less expensive and lighter weight cooling even more sensitive conventional superconducting detectors lower bolometer applicable as focal planes in infrared...
We report on the characterization of Si<sub>x</sub>N<sub>y</sub> (Si-N) optical absorbers and support beams for transition-edge sensors (TESs). The measured are suitable to meet ultra-sensitive noise equivalent power (NEP≤10<sup>-19</sup>W/√Hz) effective response time (τ) requirements (τ≤100ms) space-borne far-infrared( IR)/submillimeter(sub-mm) spectrometers, such as Background Limited far-Infrared/Sub-mm Spectrograph (BLISS) SpicA FAR-infrared Instrument (SAFARI) SPace...
Recent progress in quantum computing and the development of novel detector technologies for astrophysics is driving need high-gain, broadband, quantum-limited amplifiers. We present a purely traveling-wave parametric amplifier (TWPA) using an inverted NbTiN microstrip amorphous Silicon dielectric. Through dispersion engineering, we are able to obtain $50~\Omega$ impedance matching suppress undesired processes while phase three-wave-mixing amplification across large range frequencies. The...
Superconducting microresonators have been successfully utilized as detection elements for a wide variety of applications. With multiplexing factors exceeding 1000 detectors per transmission line, they are the most scalable low-temperature detector technology demonstrated to date. For high-throughput applications, fewer can be coupled single wire but utilize larger per-detector bandwidth. all existing designs, fluctuations in fabrication tolerances result non-uniform shift resonance frequency...
We report measurements characterizing the performance of a kinetic inductance detector array designed for wavelength 25 microns and very low optical background level suitable applications such as far-infrared instrument on cryogenically cooled space telescope. In pulse counting mode operation at flux, detectors can resolve individual 25-micron photons. an integrating mode, remain photon noise limited over more than six orders magnitude in absorbed power from 70 zW to 200 fW, with limiting...
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 kinetic inductance superconducting transmission line. The device described here utilizes compactly meandered TiN microstrip line to achieve length needed signals. It is operated in frequency translating mode where amplified signal tone terminated at output amplifier,...
We measured the noise equivalent power (NEP) of an ultra-sensitive membrane-isolated transition-edge sensor (TES) designed for SpicA FAR Infrared instrument (SAFARI) along with several Johnson Thermometry Devices (JTDs) simultaneously in a “dark” experimental setup. Our goal was to characterize dark <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex Notation="TeX">${\rm P}_{\rm D}$</tex></formula> present our setup and...