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Related Concept Videos

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

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Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
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Atomic spectroscopy is a vital tool in elemental analysis, both qualitatively and quantitatively. It can be broadly divided into optical spectroscopy, mass spectroscopy, and X-ray spectroscopy methods. The optical spectroscopic methods are atomic absorption spectroscopy (AAS), atomic emission spectroscopy (AES), and atomic fluorescence spectroscopy (AFS). The first step in all three methods is atomization, where the solid, liquid, or solution-phase samples are converted into gas-phase atoms and...
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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.
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Atomic Emission Spectroscopy: Overview01:20

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Updated: Nov 23, 2025

Generation and Coherent Control of Pulsed Quantum Frequency Combs
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Spectral characterization of photon-pair sources via classical sum-frequency generation.

Fumihiro Kaneda, Jo Oikawa, Masahiro Yabuno

    Optics Express
    |December 31, 2020
    PubMed
    Summary

    We developed a new method for precisely measuring and optimizing frequency-entangled photon pairs. This technique improves spectral characterization for quantum information applications.

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    Area of Science:

    • Quantum Optics
    • Photonics
    • Quantum Information Science

    Background:

    • Tailoring spectral properties of photon pairs is crucial for quantum information and measurement.
    • High-resolution spectral measurement is key to engineering photon properties for quantum applications.

    Purpose of the Study:

    • To demonstrate spectral measurements and optimization of frequency-entangled photon pairs.
    • To utilize frequency-resolved sum-frequency generation (SFG) as a tool for spectral characterization.

    Main Methods:

    • Employed frequency-resolved sum-frequency generation (SFG), the reverse process of spontaneous parametric downconversion (SPDC).
    • Captured joint phase-matching spectra of nonlinear crystals with high resolution (40 pm) and signal-to-noise ratio (> 40 dB).
    • Applied the technique to collinear degenerate sources, overcoming limitations of previous methods like stimulated difference frequency generation (DFG).

    Main Results:

    • Achieved significantly improved spectral resolution and signal-to-noise ratio compared to traditional coincidence measurements.
    • Demonstrated the applicability of the SFG-based method to collinear degenerate SPDC sources.
    • Showcased the utility of the measured phase-matching function for optimizing pump spectra to enhance photon spectral indistinguishability.

    Conclusions:

    • The developed precise spectral characterization technique offers a significant advancement for SPDC sources.
    • This method is valuable for tailoring photon pair properties for diverse optical quantum applications.
    • The technique provides a powerful tool for researchers in quantum optics and information science.