A5040198678- Photonic and Optical Devices
- Semiconductor Quantum Structures and Devices
- Quantum Information and Cryptography
- Semiconductor Lasers and Optical Devices
- Advanced Fiber Laser Technologies
- Mechanical and Optical Resonators
- Advanced Optical Sensing Technologies
- Spectroscopy and Laser Applications
- Neural Networks and Reservoir Computing
- Nanowire Synthesis and Applications
- Quantum Mechanics and Applications
- Advanced Semiconductor Detectors and Materials
- Spectroscopy and Quantum Chemical Studies
- Advanced Memory and Neural Computing
- Superconducting and THz Device Technology
- Quantum Dots Synthesis And Properties
- Advanced Fiber Optic Sensors
- Quantum optics and atomic interactions
- Solid State Laser Technologies
- Atomic and Subatomic Physics Research
- Photorefractive and Nonlinear Optics
- Quantum and electron transport phenomena
- Advanced Fluorescence Microscopy Techniques
- Near-Field Optical Microscopy
- Laser-Matter Interactions and Applications
National Institute of Standards and Technology
2015-2024
Physical Measurement Laboratory
2018-2024
National Institute of Standards
2014-2024
University of Colorado Boulder
2019-2023
Wright State University
2022
University of California, Santa Barbara
1992-2021
Lancaster University
2021
Massachusetts Institute of Technology
2021
Jet Propulsion Laboratory
2021
Universidade Federal de Campina Grande
2017
We present a loophole-free violation of local realism using entangled photon pairs. ensure that all relevant events in our Bell test are spacelike separated by placing the parties far enough apart and fast random number generators high-speed polarization measurements. A high-quality polarization-entangled source photons, combined with high-efficiency, low-noise, single-photon detectors, allows us to make measurements without requiring any fair-sampling assumptions. Using hypothesis test, we...
An experiment determined the trajectories of single photons through a two-slit interferometer.
Superconducting nanowire single-photon detectors (SNSPDs) are an enabling technology for myriad quantum-optics experiments that require high-efficiency detection, large count rates, and precise timing resolution. The system detection efficiencies (SDEs) fiber-coupled SNSPDs have fallen short of theoretical predictions near unity by at least 7%, with the discrepancy being attributed to scattering, material absorption, other SNSPD dynamics. We optimize design fabrication all-dielectric layered...
Photonic integration is an enabling technology for photonic quantum science, offering greater scalability, stability, and functionality than traditional bulk optics. Here, we describe a scalable, heterogeneous III-V/silicon platform to produce Si$_3$N$_4$ circuits incorporating GaAs-based nanophotonic devices containing self-assembled InAs/GaAs dots. We demonstrate pure singlephoton emission from individual dots in GaAs waveguides cavities - where strong control of spontaneous rate observed...
Conventional quantum key distribution (QKD) typically uses binary encoding based on photon polarization or time-bin degrees of freedom and achieves a capacity at most one bit per photon. Under photon-starved conditions the rate detection events is much lower than generation rate, because losses in long distance propagation relatively recovery times available single-photon detectors. Multi-bit arrival can be beneficial such situations. Recent security proofs indicate high-dimensional robust...
Get PDF Email Share with Facebook Tweet This Post on reddit LinkedIn Add to CiteULike Mendeley BibSonomy Citation Copy Text L. K. Shalm, E. Meyer-Scott, B. G. Christensen, P. Bierhorst, M. A. Wayne, J. Stevens, T. Gerrits, S. Glancy, D. R. Hamel, Allman, Coakley, Dyer, C. Hodge, Lita, V. Verma, Lambrocco, Tortorici, Migdall, Y. Zhang, Kumor, W. H. Farr, F. Marsili, Shaw, Stern, Abellán, Amaya, Pruneri, Jennewein, Mitchell, Kwiat, Bienfang, Mirin, Knill, and Nam, "A strong loophole-free test...
We present a 1024-element imaging array of superconducting nanowire single photon detectors (SNSPDs) using 32x32 row-column multiplexing architecture. Large arrays are desirable for applications such as imaging, spectroscopy, or particle detection.
We have created heralded coherent state superpositions (CSS), by subtracting up to three photons from a pulse of squeezed vacuum light. To produce such CSSs at sufficient rate, we used our high-efficiency photon-number-resolving transition edge sensor detect the subtracted photons. This is first experiment enabled and utilizing full capabilities this detector. The CSS produced three-photon subtraction had mean photon number 2.75 -0.24/+0.06 fidelity 0.59 -0.14/+0.04 with an ideal CSS....
We use molecular beam epitaxy to grown coherently strained InGaAs islands on (100) GaAs substrates. The show room-temperature photoluminescence at 1.3 μm with a full width half-maximum of only 28 meV. integrated intensity is comparable that quantum well. are formed by depositing 22 monolayers In0.3Ga0.7As alternating beams In, Ga, and As2. Atomic force microscopy measurements the ellipsoidal sections an average peak height 24 nm. intersection plane ellipse whose major axis along [011̄] has...
Alternating molecular beam epitaxy is used to form InGaAs quantum dots by utilising the two-dimensional three-dimensional Stranski-Krastanow growth transition. The are embedded in a separate confinement heterostructure laser diodes. Lasing observed from excited states room temperature down 80 K. Pronounced state-filling dot lasers at temperature. As decreased, becomes less pronounced, which compensates for bandgap increase and leads whose lasing wavelength very weakly dependent on
In atomically thin two-dimensional semiconductors such as transition metal dichalcogenides (TMDs), controlling the density and type of defects promises to be an effective approach for engineering light-matter interactions. We demonstrate that electron-beam irradiation is a simple tool selectively introducing defect-bound exciton states associated with chalcogen vacancies in TMDs. Our first-principles calculations time-resolved spectroscopy measurements monolayer ${\mathrm{WSe}}_{2}$ reveal...
We present experimental coherent two-dimensional Fourier-transform spectra of Wannier exciton resonances in semiconductor quantum wells generated by a pulse sequence that isolates two-quantum coherences. By measuring the real part signals, we determine are dominated coherences due to mean-field many-body interactions, rather than bound biexcitons. Simulations performed using dynamics controlled truncation agree with experiments.
Quantum teleportation is an essential quantum operation by which we can transfer unknown state to a remote location with the help of entanglement and classical communication. Since first experimental demonstrations using photonic qubits continuous variables, distance over free space channels has continued increase reached >100 km. On other hand, optical fiber been challenging, mainly because multi-fold photon detection that inevitably accompanies experiments very inefficient due relatively...
We demonstrate high-efficiency superconducting nanowire single-photon detectors (SNSPDs) fabricated from MoSi thin-films. measure a maximum system detection efficiency (SDE) of 87 +- 0.5 % at 1542 nm temperature 0.7 K, with jitter 76 ps, count rate approaching 10 MHz, and polarization dependence as low 3.4 The SDE curves show saturation the internal similar to WSi-based SNSPDs temperatures high 2.3 K. that cryogenic temperatures, achieve efficiencies comparable nearly factor two reduction in jitter.
To realize functionality similar to that of their biological inspirations, advanced neuromorphic systems require massive interconnectivity, extreme energy efficiency, and complex signaling mechanisms. The authors propose an integrated optoelectronic platform combining superconducting electronics with photonic signaling, enable computing beyond the scale human brain.
Many photonic quantum information processing applications would benefit from a high brightness, fiber-coupled source of triggered single photons.Here, we present photonic-crystal waveguide (PCWG) singlephoton relying on evanescent coupling the light field tapered outcoupler to an optical fiber.A two-step approach is taken where performance recorded first independent device containing on-chip reflector.Reflection measurements establish that chip-to-fiber efficiency exceeds 80%.The detailed...
We developed superconducting nanowire single-photon detectors based on tungsten silicide, which show saturated internal detection efficiency up to a wavelength of 10 μm. These are promising for applications in the mid-infrared requiring sub-nanosecond timing, ultra-high gain stability, low dark counts, and high efficiency, such as chemical sensing, LIDAR, matter searches, exoplanet spectroscopy.
For photon-counting applications at ultraviolet wavelengths, there are currently no detectors that combine high efficiency (> 50%), sub-nanosecond timing resolution, and sub-Hz dark count rates. Superconducting nanowire single-photon (SNSPDs) have seen success over the past decade for in near-infrared, but little work has been done to optimize SNSPDs wavelengths below 400 nm. Here, we describe design, fabrication, characterization of UV operating between 250 370 The active areas up 56 μm...
Single self-assembled InAs/GaAs quantum dots are a promising solid-state technology, with which vacuum Rabi splitting, single-photon-level nonlinearities, and bright, pure, indistinguishable single-photon generation having been demonstrated. For such achievements, nanofabrication is used to create structures in the dot preferentially interacts strongly-confined optical modes. An open question extent may also have an adverse influence, through creation of traps surface states that could...
We report high-fidelity state readout of a trapped ion qubit using trap-integrated photon detector. determine the hyperfine single $^{9}{\mathrm{Be}}^{+}$ held in surface-electrode rf trap by counting state-dependent fluorescence photons with superconducting nanowire single-photon detector fabricated into structure. The average fidelity is 0.9991(1), mean duration $46\text{ }\text{ }\ensuremath{\mu}\mathrm{s}$, and limited polarization impurity laser beam off-resonant optical pumping....
Single-photon detectors based on superconducting thin films have become a viable class of technologies for widespread usage in quantum optics. In this tutorial paper we introduce the key performance metrics required them information processing and related fields. We review latest records achieved by such devices, study technical details regarding recent improvements nanowire transition-edge sensors, present representative applications cutting-edge research areas that benefit from these advances.