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Related Concept Videos

Atomic Absorption Spectroscopy: Interference01:25

Atomic Absorption Spectroscopy: Interference

Interference leads to systematic error in atomic absorption (AA) measurements by enhancing or diminishing the analytical signal or the background. These interferences can be grouped into three main categories: spectral interference, chemical interference, and physical interference.
Spectral interference occurs when signals from other elements or molecules overlap with the analyte signal, falsely elevating or masking the analyte's absorbance. This interference can be corrected using Zeeman,...
Atomic Emission Spectroscopy: Interference01:30

Atomic Emission Spectroscopy: Interference

In atomic emission spectroscopy (AES), high-temperature atomizers excite a broad range of elements and molecules that generate complex emissions from sources such as oxides, hydroxides, and flame combustion products in the flame or plasma. Several strategies can be employed to minimize spectral interferences caused by overlapping emission lines or bands. These include increasing instrument resolution, choosing alternative emission lines, optimally placing the detector in low-background regions,...
Atomic Force Microscopy01:08

Atomic Force Microscopy

Atomic force microscopy (AFM) is a type of scanning probe microscopy that can analyze topographic details of various specimens like ceramics, glass, polymers, and biological samples. AFM offers over 1000 times more resolution than the optical imaging system. Images generated from AFM are three-dimensional surface profiles, offering an advantage over the flat, two-dimensional images from other imaging techniques.
The AFM Probe
The probe is regarded as the heart of any AFM setup and comprises the...
Atomic Absorption Spectroscopy: Instrumentation01:22

Atomic Absorption Spectroscopy: Instrumentation

An atomic absorption spectrophotometer (AAS) comprises several components: a radiation source, an atomizer, a monochromator, and a detector. The radiation source can be a hollow-cathode lamp (HCL) or an electrodeless-discharge lamp (EDL), both of which provide a narrow emission line of the required wavelength. However, some instruments use continuum sources and high-resolution monochromators to achieve a narrow range of radiation.
The atomizer used in AAS can be either a flame atomizer or an...
Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers.  Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
Interference and Diffraction02:18

Interference and Diffraction

Interference is a characteristic phenomenon exhibited by waves. When two electromagnetic waves interact with their peaks and troughs coinciding, a resulting wave with enhanced amplitude is produced. This is known as constructive interference. In this case, the two waves interacting are in phase with each other.

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Related Experiment Video

Updated: May 7, 2026

Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
10:39

Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating

Published on: October 11, 2016

Enhanced atom interferometer readout through the application of phase shear.

Alex Sugarbaker1, Susannah M Dickerson, Jason M Hogan

  • 1Department of Physics, Stanford University, Stanford, California 94305, USA.

Physical Review Letters
|October 1, 2013
PubMed
Summary

We developed a new method to measure atom interferometer phase and contrast from a single image. This technique improves precision measurements, demonstrated by a 10 mdeg atomic fountain gyrocompass.

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Area of Science:

  • Atomic physics
  • Quantum optics
  • Precision measurement

Background:

  • Atom interferometers are powerful tools for precision measurements.
  • Determining phase and contrast typically requires multiple measurements or complex setups.
  • Single-shot measurement capabilities are crucial for advancing atom interferometry.

Purpose of the Study:

  • To present a novel method for single-shot phase and contrast determination in atom interferometers.
  • To demonstrate the broad applicability of this method for precision measurements.
  • To implement and validate the technique in a real-world atomic fountain experiment.

Main Methods:

  • Applying a phase shear across an atom ensemble to create a spatially varying fringe pattern.
  • Direct imaging of the fringe pattern at each output port of the atom interferometer.
  • Implementing the method in a 10 m 87Rb atomic fountain setup.

Main Results:

  • Successfully determined the phase and contrast from a single interferogram.
  • Achieved a precision of 10 mdeg in an atom-interferometric gyrocompass.
  • Validated the method's effectiveness in a challenging experimental environment.

Conclusions:

  • The presented method enables efficient single-shot phase and contrast measurement in atom interferometers.
  • This technique significantly enhances the capabilities for precision measurements using atomic systems.
  • The demonstrated gyrocompass performance highlights the practical utility of this advancement.