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Related Concept Videos

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).
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Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
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Computational spectrometer with multi-channel cascaded silicon add-drop micro-ring resonators.

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    We developed a compact computational spectrometer using silicon micro-ring resonators for portable spectral analysis. This device achieves high resolution and broadband spectrum reconstruction on a small chip.

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    Area of Science:

    • Photonics
    • Integrated optics
    • Spectroscopy

    Background:

    • Miniaturized spectrometers are crucial for portable spectral analysis.
    • Computational spectrometers offer a promising solution for device miniaturization.
    • Silicon-on-insulator (SOI) technology enables complex integrated photonic devices.

    Purpose of the Study:

    • To design and implement an integrated computational spectrometer on an SOI substrate.
    • To achieve high spectral resolution and broadband capabilities in a compact footprint.
    • To explore the potential of micro-ring resonators for advanced spectral analysis.

    Main Methods:

    • Utilized a 5-stage binary tree architecture with cascaded silicon add-drop micro-ring resonators (MRRs).
    • Incorporated 31 signal branches, each with 4 MRRs, and one reference channel.
    • Designed MRRs with arbitrary coupling coefficients, cavity perimeters, and center distances for 62 filter channels.

    Main Results:

    • Achieved a chip footprint of 1.5 mm².
    • Demonstrated a spectral resolution of 0.11 nm in the C-band.
    • Successfully performed broadband spectrum reconstruction with a bandwidth exceeding 10 nm.

    Conclusions:

    • The integrated computational spectrometer is a viable solution for portable spectral analysis.
    • The MRR-based design offers high performance in a compact form factor.
    • This technology paves the way for advanced miniaturized spectral sensing applications.