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Projects/Programs

Keyword

Organizational Unit

Frequency Comb Spectroscopy

Ongoing

Erbium mode-locked fiber lasers are a mature technology that provide a means to build robust optical frequency combs centered near 1550 nm. One research focus of our group is to extend the optical bandwidth of Er fiber-based combs into the near- to mid-infrared wavelength region of 1000 to 5000 nm

Frequency Conversion Interfaces for Photonic Quantum Systems

Ongoing

Our research on quantum frequency conversion follows two main tracks. First, we combine relatively mature frequency conversion technology based on periodically-poled lithium niobate waveguides with quantum light generated by single semiconductor quantum dots in proof-of-principle experiments that

Frequency Measurement and Analysis Service (FMAS)

Ongoing

Subscribers to the NIST service receive a complete frequency measurement system which includes everything needed to make precision frequency measurements that are traceable to NIST. An easy-to-read instruction manual makes installation a snap. Once the system is installed, it's easy to get started

Fundamental Constants in Nature

Ongoing

The Task Group on Fundamental Constants periodically publishes updated evaluations of the fundamental constants of physics and chemistry. These evaluations serve two purposes. First, they provide a self-consistent set of recommended values of the constants for all to use. Second, because they

Fundamental Physics: Electric Field Imaging with Neutrons

Completed

An effective magnetic field B eff arises from the relativistic transformation of an electric field E into the frame of reference moving at the neutron velocity v; B eff is proportional to v x E /c 2, hence is small due to the factor of the square of the speed of light in the denominator. This

Fundamental Physics: Experiments with a Precision Neutron Polarimeter

Ongoing

The NSR neutron polarimeter has limited two separate physical quantities, spin rotation due to parity non-conservation and long-range spin-dependent interactions. Firstly, we completed a successful run of an experiment to study the strong interaction using weak interaction properties of the neutron

Fundamental Physics: Magnetically Trapped Neutron Lifetime Experiment

Completed

A precise value for the neutron lifetime is required for several internal consistency tests of the SM including searches for right-handed currents and tests of the unitarity of the CKM mixing matrix. Measurements of neutron decay coefficients provide information on the vector and axial-vector

Fundamental Physics: Measurement of the Electron-Antineutrino Correlation in Neutron Decay (aCORN)

Completed

NIST in collaboration with Tulane University, Hamilton College, DePauw University, and Indiana University (the aCORN collaboration) carried out a measurement of the electron-antineutrino correlation “little a” in neutron beta-decay. Experiments of this type are designed to characterize final state

Fundamental Physics: Measurement of the Neutron Magnetic Dipole Moment Using Schwinger Scattering

Completed

Schwinger scattering is caused by the interaction between the neutron's magnetic dipole moment (MDM) and the atomic electric field inside a silicon crystal. The atomic electric field with a magnitude of 108 V/cm induces a tiny magnetic field in the rest frame of the moving neutron and thus a torque

Fundamental Physics: Neutron Lifetime Measurement Using a Cold Neutron Beam

Ongoing

In the beam technique, the lifetime is measured by counting the absolute number of protons within a fiducial volume while continuously monitoring the absolute neutron flux. We completed the first experiment in 2003, and the uncertainty in the result was dominated by systematic effects associated

Fundamental Physics: Precision Measurement of the Branching Ratio and Energy Spectrum of Radiative Neutron Decay

Completed

While inner-bremsstrahlung has been measured in nuclear beta decay and electron capture decays, it has only recently been observed in free neutron beta decay. In 2006, we reported the first observation of this radiative decay mode in the journal Nature. The experiment was completed at the NG-6

Fundamental Physics: A Precision Reactor Antineutrino Oscillation and Spectrum Measurement (PROSPECT)

Ongoing

Multiple improved global analyses of short baseline (O ~ 10-100 m) reactor antineutrino experiments carried out in 2011 suggested a significant deficit in the observed flux of antineutrinos compared to calculation. Similar anomalies had been observed in neutrino source experiments. It was suggested

Fundamental Physics: Search for Time Reversal Violation in Polarized Neutron Decay (emiT)

Completed

The stars and galaxies that make up our universe can only form if, during the initial moments after the Big Bang, there existed a slight dominance of matter over antimatter. It has been understood for some time that such an imbalance can only be explained if three conditions are met; a departure

GaN Nanowire Growth

Ongoing

Selective epitaxy: We have demonstrated that the diameter and placement of nanowires can be controlled by using silicon nitride (SiNx) masks on top of MBE-grown buffer layers (see figure). With electron beam lithography, several patterns with 3 mm die size that provide over 100,000 controlled

GaN Nanowire Metrology and Applications

Ongoing

GaN Nanowire LEDs: Our selective epitaxy methods and dopant characterization techniques have enabled fabrication of arrays of nanowire LEDs with controlled location and spatial layout. This development is complemented by modeling of the carrier flow and recombination. These LEDs were combined to

Gas Flow and Properties: Standards and Models for Flow Metering Semiconductor Gases at Flows from 10 μL/min to 1 L/min

Ongoing

Today the control of process gases in semiconductor fabrication is highly empirical. The process is based on “recipes” for each step. The development of these recipes is a time-consuming process of trial and error, and each day in development can translate to many millions of dollars of lost

Gas properties for flow metering

Ongoing

NIST has two on-line databases that include accurate gas viscosity values: SEMIPROP - NIST Standard Reference Database 134 - for selected semiconductor process gases NIST Chemistry WebBook - for heat transfer fluids, components of air, components of natural gas [Note: as of February 2014, the NIST

viral vector illustration with RNA seen within the capsid

Gene Delivery Particle Analysis with High-Throughput Light Scattering Microscopy

Ongoing

This project aims to develop light-scattering microscopy methods for rapid, multi-attribute characterization of gene therapy particles at the single particle level. Emerging gene therapy treatments use gene delivery particles, such as viral vectors and non-viral carriers, to cure intractable

Hardware Accelerators for Neural Networks

Ongoing

One promising candidate for building a hardware accelerator comes from the field of spintronics, where information is carried by electronic spin rather than charge. Magnetic tunnel junctions are particularly suited because of their multifunctionality and compatibility with standard integrated

Hardware Accelerators for Statistical Computing

Ongoing

Finding good solutions to many hard problems, like combinatorial optimization and traveling salesman problems, counterintuitively requires making the estimated solution worse before making it better. This situation results from many hard problems having many “solutions” that cannot be improved

High Amplification Laser-pressure Optic (HALO)

Ongoing

We have assembled a high-accuracy laser power meter based on radiation pressure with multiple reflections of the laser on the sensing mirror. A custom electrostatic force balance supports a high-reflectivity sensing mirror upon which a high-power continuous wave laser beam is incident at ~ 45

High Resolution Atomic Spectroscopy

Ongoing

For many decades, the Atomic Spectroscopy Group at NIST has measured atomic data of vital use to astronomy and other fields using high resolution spectrometers that are found in few other places in the world. These include a 2-m path difference Fourier transfer (FT)spectrometer, a vacuum ultraviolet

Today, device performance needs to be evaluated to determine success of materials development. This project will advance metrology for magnetic materials and develop models to predict device performance.

High Speed Metrology for Magnetoelectronic Devices and Models

Ongoing

The U.S. Semiconductor industry is integrating ferromagnet-based microelectronic devices such as magnetic RAM (MRAM) into existing silicon-based technologies. MRAM has much shorter write times and higher write endurance than the embedded Flash currently used. These properties makes MRAM highly

Transmission line/interferometer configured for an electron spin resonance measurement of radiation induced free radical ensembles important for dosimetry measurements.

Highly Sensitive Microwave Interferometric Detection of Ensembles of Electron Spins

Ongoing

This project has developed a rather simple microwave interferometry detection circuit (Fig. 1a) which can be coupled to a variety of microstrip transmission line probes to sense small impedance changes associated with specific electron spins. The interferometry circuit is of the Mach-Zehnder type

High-Power Laser Applications

Ongoing

Measurement challenges Traditional measurements of laser power or energy involve absorbing the laser light and measuring the resulting temperature increase of the absorber. However, as the power and total energy delivered by these lasers increases, thermal management, absorber size, and response

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Advanced communications
-Open Radio Access Network (Open-RAN)
-Quantum communications
-Spectrum sharing
-Wireless (RF)
Bioscience
-Bioeconomy
--Biological data
-Bioimaging
-Bioinformatics
-Biomanufacturing
-Biomaterials
-Biometrology
-Biosecurity
--Biosurveillance
--Genomic cybersecurity
--Nucleic acid sequence screening
-Cell measurements
-Engineering / synthetic biology
--Biofabrication
--Cell-free systems
--Genome engineering
--Protein engineering
-Gene delivery systems
-Genome editing
-Genomics
-Glycomics
-Metabolomics
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-Proteomics
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Buildings and Construction
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-Building damage and repair
-Building economics
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-Energy efficiency
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-Indoor air quality
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Chemistry
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Electronics
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-Flexible electronics
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-Optoelectronics
-Organic electronics
-Semiconductors
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Energy
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-Fuels
Environment
-Air / water / soil quality
-Climate Measurements
-Environmental health
-Greenhouse gas measurements
-Marine science
-Sustainability
Fire
-Fire detection
-Fire dynamics and science
-Fire fighting
-Fire modeling
-Fire risk reduction
-Materials flammability
-Structural fire resistance
-Wildland urban interface fire
Forensic Science
-Digital evidence
-Drugs and toxicology
-Firearms and toolmarks
-Forensic biometrics
-Forensic genetics
-Trace evidence
Health
-Biopharmaceuticals
-Cell and gene therapy
-Clinical diagnostics
--Cancer
--Medical imaging
-Food and nutrition
-Human microbiome
-Precision medicine
-Regenerative medicine and advanced therapy
--Flow cytometry
Information technology
-Artificial intelligence
--AI measurement and evaluation
--Applied AI
--Fundamental AI
--Hardware for AI
--Machine learning
--Trustworthy and responsible AI
-Biometrics
-Cloud computing and virtualization
-Complex systems
-Computational science
-Conformance testing
-Cyber-physical systems
--Smart cities
-Cybersecurity
--Cryptography
--Cybersecurity education and workforce development
--Cybersecurity measurement
--Identity and access management
--Privacy engineering
--Risk management
--Securing emerging technologies
--Trustworthy networks
--Trustworthy platforms
-Data and informatics
--Human language technology
--Information retrieval
--Natural language processing
-Federal information processing standards (FIPS)
-Health IT
-Internet of Things (IoT)
-Interoperability testing
-Location based services
-Mobile
-Networking
--Mobile and wireless networking
--Network management and monitoring
--Network modeling and analysis
--Network security and robustness
--Network test and measurement
--Next generation networks
--Protocol design and standardization
--Software defined and virtual networks
-Privacy
-Software research
--Software testing
-Usability and human factors
--Accessibility
-Video analytics
-Virtual / augmented reality
-Visualization research
-Voting systems
Infrastructure
Manufacturing
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-Factory communications
-Factory operations planning and control
-Interoperability in manufacturing
-Machining
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-Manufacturing quality assurance
-Manufacturing systems design and analysis
-Monitoring, diagnostics and prognostics
-Process improvement
-Process measurement and control
-Product data
-Robotics in manufacturing
--Agility and adaptability
--Collaborative robots
--Dexterous grasping
--Manipulation
--Mobility and industrial autonomous vehicles
--Navigation / actuation / control
--Sensing and perception
-Supply chain
-Sustainable manufacturing
-Systems engineering
-Systems integration
-Technology commercialization
Materials
-Ceramics
-Composites
-Concrete / cement
-Materials characterization
--Composition and structure
--Mechanical properties
--Thermal properties
-Metals
-Modeling and computational material science
-Polymers
-Superconductors
Mathematics and statistics
-Experiment design
-Image and signal processing
-Modeling and simulation research
-Numerical methods and software
-Statistical analysis
-Uncertainty quantification
Metrology
-Amount of substance
-Dimensional metrology
-Electrical / electromagnetic metrology
-Flow metrology and rheology
-Force metrology
-Humidity metrology
-Ionizing radiation metrology
-Mass metrology
-Metric
-Optical / photometry / laser metrology
-Pressure and vacuum metrology
-Thermometry metrology
-Time and frequency metrology
-Weights and measures
Nanotechnology
-Nanobiotechnology
-Nanochemistry
-Nanoelectronics
-Nanofabrication / manufacturing
--Lithography
--Self-assembly
-Nanofluidics
-Nanomagnetics
-Nanomaterials
-Nanomechanics
-Nanometrology
-Nanophotonics
-Nanophysics
-Nanoplasmonics
Neutron research
Performance excellence
-Assessment tools and services
-Baldrige award
-Baldrige examiners
-Baldrige Framework and Criteria
-Best practices
-Leadership development
Physics
-Atomic / molecular / quantum
-Biological physics
-Condensed matter
-Electron physics
-Magnetics
-Nuclear physics
-Optical physics and communications
-Quantum information science
-Radiation
-Spectroscopy
-Thermodynamics
-Time and frequency
Public safety
-Chemical / Biological / Radiological / Nuclear / Explosives (CBRNE)
-First responder preparedness
-Law enforcement
-Public safety communications research
-Response robots
Resilience
-Community resilience
--Recovery
--Resilience metrics
-Disaster and failure studies
-Earthquake risk reduction
-Resilience economics
-Resilient materials
-Windstorm impact reduction
Standards
-Accreditation
-Calibration services
-Conformity assessment
-Documentary standards
-Frameworks
-Quality assurance
-Reference data
-Reference instruments
-Reference materials
-Standards education
Technology transfer
Transportation
-Aerospace
-Automotive