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Physics Portal - Overview

Physics research at NIST includes everything from improving the safety of medical radiation procedures to developing future "quantum information" technologies that generate unbreakable codes. NIST provides the measurements, standards, and technical expertise scientists and industries need to push the limits of the fundamental properties of nature.

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Programs and Projects
NIST Standard Reference Simulation Website

The Standard Reference Simulation Website is an ongoing project whose aim is to provide well-documented simulation results for a variety of … more

Photovoltaic Carrier Dynamics Measured by Time-Resolved Terahertz Spectroscopy

Far-infrared (or THz, 25 to 300 micron wavelength) femtosecond laser methods are employed to measure photovoltaic (PV) materials spectra and … more

Terahertz Bi-Directional Reflection Function Measurements for Homeland Security

Far-infrared (Terahertz or THz, 25 to 300 micron wavelength) femtosecond laser methods are employed to generate high power broadband pulses for … more

Hydrogen Generation in Di-Iron Hydrogenase Mimics

Discovery of novel materials to facilitate hydrogen gas production has prompted new avenues of research towards developing hydrogen as an … more

Far-infrared Spectroscopy of Biomolecules

Far-infrared (or terahertz/THz, ca. 25 to 300 micron wavelength) femtosecond pulsed laser and Fourier-transform infrared methods are employed to … more

Test and Evaluation Protocols for ANSI/IEEE N42 Standards

The purpose of these test and evaluation protocols is to provide additional information to the published ANSI/IEEE N42 series for homeland … more

Instruments
Ultrafast Terahertz Spectroscopy and Imaging

Three independent femtosecond laser systems are used for generating ultrafast pulses in the mid-IR (and Terahertz(THz) spectral regions through … more

Primary optical watt radiometer (POWR) facility

POWR is a cryogenic electrical substitution radiometer that serves as the Nation's optical power reference. more

Lunar spectro-radiometer

Design of the lunar irradiance instrument is based on commercially available spectrographs. These spectrographs can be stable and sub-components … more

Infrared reference integrating sphere (IRIS)

An integrating-sphere system has been designed and constructed for the measurement of multiple optical properties in the infrared spectral range. … more

Synchrotron Ultraviolet Radiation Facility SURF III

The Synchrotron Ultraviolet Radiation Facility SURF III is operated by the National Institute of Standards and Technology NIST as a stable light … more

Bidirectional optical scattering facility

Goniometric optical scatter instrument (GOSI) The bidirectional reflectance distribution function (BRDF) quantifies the angular distribution of … more

Software
Electron holography

An electron hologram is a fringe modulated image containing the amplitude and phase information of an electron transparent object. The HolograFREE … more

SCATMECH

SCATMECH is an object-oriented C++ class library developed to distribute models for light scattering applications. Included in the library are … more

Modeled integrated scattering tool (MIST)

The MIST program has been developed to provide users with a general application to model an integrated scattering system. The program performs an … more

NIST's Integrated colony enumerator (NICE)

Enumeration of bacterial colonies on an agar plate is simple in concept, but automated colony counting is difficult due to variations in colony … more

Noncollinear phase matching in uniaxial and biaxial crystals

Although significant work has been done to characterize collinear phase matching and to present many of its applications, noncollinear phase … more

FPGA-based multicoincidence recipe and software

The Data Acquisition Platform project allows one to build their own data acquisition instruments that collect and, if necessary, statistically … more

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