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Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

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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).
There are three main types of inductively coupled plasma atomic emission spectroscopy  (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used....
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Updated: May 30, 2025

Probing C84-embedded Si Substrate Using Scanning Probe Microscopy and Molecular Dynamics
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Silicon computational spectrometer with 32-channel meta-structures.

Zeruihong She, Tianyue Zhang, Kai Wang

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    |January 31, 2025
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    Summary
    This summary is machine-generated.

    We developed a compact silicon spectrometer using meta-structures for high-resolution spectral analysis. This novel device achieves a spectral resolution of 50 picometers in the C-band.

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    Area of Science:

    • Photonics and Nanotechnology
    • Spectroscopy
    • Integrated Optics

    Background:

    • Traditional spectrometers are often bulky and expensive.
    • Miniaturization of spectroscopic devices is crucial for portable and integrated applications.
    • Meta-structures offer unprecedented control over light-matter interactions at the nanoscale.

    Purpose of the Study:

    • To develop a compact and high-resolution computational spectrometer.
    • To leverage meta-structures for advanced spectral analysis.
    • To demonstrate the feasibility of silicon-on-insulator (SOI) technology for integrated spectroscopy.

    Main Methods:

    • Fabrication of a 32-channel meta-structure array on a silicon-on-insulator platform.
    • Engineering each meta-structure channel with a unique transmission spectrum.
    • Utilizing the distinct spectral responses for computational spectral reconstruction.
    • Experimental characterization of the device's performance in the C-band.

    Main Results:

    • A compact spectrometer with a footprint of 1.15 µm × 24.5 µm per channel.
    • Demonstrated high spectral resolution of 50 picometers (pm).
    • Successful spectral reconstruction enabled by the meta-structure array.
    • Minimum feature size of 70 nm achieved in meta-structure fabrication.

    Conclusions:

    • The developed meta-structure-based spectrometer offers a compact and efficient solution for high-resolution spectral measurements.
    • Silicon-on-insulator technology is suitable for realizing advanced photonic devices like computational spectrometers.
    • This work paves the way for miniaturized spectroscopic systems in various fields.