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Physical Measurement Laboratory

Patents

Searches Patent Title, Abstract, Body, Technology Type, and NIST Inventors
Displaying 51 - 75 of 151
Embodiments of spin-multiplexed near- and deep-UV metaholograms.

Low-loss Metasurface Optics For Deep UV

NIST Inventors
Henri Lezec and Wenqi Zhu
In this invention, we employ a novel approach to construct high-performance optical elements operating in the UV and deep-UV regime. Our technology is based on metasurfaces, where we design nanoantennas with sizes a fraction of the scale of the wavelength of UV light and arrange them over a planar

Photonic Resonator Analyzer And Characterizing A Photonic Resonator

NIST Inventors
Zeeshan Ahmed
We describe a method for distinguishing optical modes of a resonator based on the characterization of the temperature sensitivity of a mode’s resonance frequency and its dispersion characteristics. This method requires an interrogator (made up of a tunable laser, broadband light source, frequency
An empty petri dish with two optical fibers, illustrating one version of the researchers’ experiment. The left-hand fiber (usually shining infrared light, but depicted here as visible red light) is a temperature sensor. The top fiber shines green, red or blue light into the petri dish to adjust the signal that the temperature sensor measures.

PH Photothermal Spectrometer And Performing PH Photothermal Spectroscopy

NIST Inventors
Zeeshan Ahmed
A device that uses multiple wavelengths (colors) of light to probe the pH-dependent changes in absorbance of pH-sensitive dye by determining the difference in temperature rise due to differences in light absorbance at different colors. The absorbed light is thermalized, resulting in an increase in

Self-Referenced Ambient Radiation Thermometer

NIST Inventors
Howard W. Yoon
In this work, we describe the construction and characterization of an Ambient-Radiation Thermometer (ART) which can measure non-contact temperatures from -50 deg C to 150 deg C. To increase the long-term stability of the responsivity, optical components within the field-of-view of the detector and

Closed-loop Controlled Chemical Apparatus

NIST Inventors
Arvind Balijepalli , Curt A. Richter and Son T. Le
A closed-loop controlled chemical apparatus includes: a compound sensor including: an analyte sensor and that: produces, by the analyte sensor, a voltage signal; a reference sensor in electrical communication with the analyte sensor; a transistor including a gate terminal such that a drain current
Ultra-conformal microprint technology used to micropattern 3D surfaces that are geometrically too challenging for patterning with conventional microfabrication systems.

Ultra-Conformal Microprint and Ultra-Conformal Microprint Transferring

NIST Inventors
Gary Zabow
This invention is a new method of transferring (“transfer printing”) microstructures or micropatterns created on a first surface onto a second receiving surface, where the second surface may be highly uneven or curved or in some other way incompatible with the fabrication process requirements of the
Illustration a-d showing how the multidimensional printer works.

Multidimensional Printer

NIST Inventors
Glenn Holland and Andrei Kolmakov
In our invention, the electron or X-ray beam penetrates the liquid from the vacuum after passing through the ultra-thin separating membrane and crosslinks the polymer molecules in the liquid solution within the interaction volume. Additive layer-by-layer fabrication can be achieved via

Optical Refraction Barometer

NIST Inventors
Kevin O Douglass , Stephen Eckel , Jacob Edmond Ricker and Jay H. Hendricks
A new method for measuring refractivity-based pressure changes using a dual Fabry-Perot cavity utilizing a single laser with off-set sideband locking to the second cavity. The method thus far has shown sensitivity and resolution of 4 mPa.

Quantum Waveguide Infrared Photodetector

A novel quantum well infrared photodetector (QWIP) is proposed, which provides an unprecedented signal-to-noise ratio compared any other infrared detector. The key feature is the ability to inject light in the absorbing regions in the plane of the detector material layers, rather than surface normal

Quantum Waveguide Infrared Photodetector

A novel quantum well infrared photodetector (QWIP) is proposed, which provides an unprecedented signal-to-noise ratio compared any other infrared detector. The key feature is the ability to inject light in the absorbing regions in the plane of the detector material layers, rather than surface normal

Single Quantum Emitter Single Photon Source And Producing A Single Photon Stream

NIST Inventors
Marcelo Davanco
A single quantum emitter single photon source produces a single photon stream and includes: a single-mode excitation waveguide that receives a pump light, propagates pump light as resonant excitation light, and produces evanescent excitation light; a separation gap between single-mode excitation
An automated comparison measurement between two PJVS systems using an analog nanovoltmeter

Josephson Voltage Standard

NIST Inventors
Samuel P. Benz , Paul Dresselhaus , Alain Rufenacht , Nathan Flowers-Jacobs and Anna Fox
It was determined that a device having simultaneous voltage reference signals would be useful for many measurement and calibration activities. A JVS advantageously having multiple output leads would meet this criterion, and provide such voltage references without the need for multiple systems
This circuit measures the timing jitter, or variation, in the arrival time of a repetitive electrical signal of interest, such as from the output of a single-photon detector under short-pulse illumination. An ultra-low jitter clock that is synchronous with the repetition rate of the input signal is slowly swept in time (by some external means of phase delay) with respect to the input signal.

Temporal Jitter Analyzer And Analyzing Temporal Jitter

NIST Inventors
Joshua Bienfang
This is a simple method to measure the jitter, or temporal variation, of a repeated event. The method is based on simple electronic circuitry and can achieve measurement resolution on the order of hundreds of femtoseconds.

Smart Temperature Sensor That Works Without Touch

NIST Inventors
Howard W. Yoon
This invention introduces a temperature detector that stabilizes radiation measurements using an isothermal reference. It ensures high accuracy by self-referencing ambient radiation, reducing errors caused by environmental fluctuations. The detector is designed to work without direct contact, making

Fluxonic Processor And Processing Photonic Synapse Events

NIST Inventors
Jeff Shainline
A fluxonic processor includes processes photonic synapse events and includes a transmitter that receives neuron signal and produces output photons; a neuron that receives a dendrite signal and produces the neuron signal from the dendrite signal; a dendrite that receives a synapse signal, and

Ultra-Fast, Energy-Efficient Processor for Smarter Computing

NIST Inventors
Jeff Shainline
This invention introduces a fluxonic processor, which operates using superconducting circuits to process information efficiently. It leverages synaptic and dendritic signal processing, mimicking neural networks for advanced computing. The processor is designed to handle complex computations with

Ultrafast Electro-optic Laser

NIST Inventors
Scott Papp , Scott Diddams and David Carlson
An ultrafast electro-optic laser makes a stabilized comb and includes: a comb generator that produces a frequency comb; a dielectric resonant oscillator; a phase modulator in communication with the dielectric resonant oscillator; an intensity modulator in communication with the phase modulator; an
The matrix decomposition system block.

Quasi-Systolic Processor and Quasi-Systolic Array

NIST Inventors
Matthew Daniels , Mark D. Stiles and Advait Madhavan
The invention is a computer architecture that efficiently calculates a weight matrix update for an AI model, especially ones designed to be implemented in hardware neural networks. Our architecture uses an approximation algorithm to do this calculation with less memory overhead. The architecture

Photoacoustic Photon Meter And Process For Measuring Photon Fluence

NIST Inventors
Kimberly A. Briggman , Chris Yung , Jeeseong C. Hwang and John H. Lehman
A photoacoustic photon meter includes: a photoacoustic generative array including carbon nanotubes disposed in a photoacoustic generating pattern, such that the carbon nanotubes: receive photons comprising optical energy, and produce thermal energy from the optical energy; and a superstratum

Absolute Mass Balance

NIST Inventors
Leon Chao and Jon R. Pratt
An absolute mass balance determines an absolute mass of an object and includes: a dual diameter wheel including: a balance fulcrum; and a balance beam disposed on the balance fulcrum and including: a main mass arm and a counter mass arm; a main mass receiver that receives the object; a main magnet

Non-Vacuum, Non-Contact Spinner Wafer Chuck

NIST Inventors
Glenn Holland
A non-vacuum, non-contact spinner wafer chuck including: a basal member including; a fastener receiver that receives a fastener; a chuck collar including: an inner collar wall; and an outer collar wall; and an engagement surface that: receives and engages a wafer; a wafer engagement cam including
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