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Related Concept Videos

Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

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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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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.
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Tandem Mass Spectrometry01:21

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Tandem mass spectrometry is a technique that uses multiple mass analyzers in series to obtain a higher selectivity and reduce chemical noise during analyte detection. Instruments with multiple analyzers separated by an interaction cell enable secondary fragmentation and selected study of the fragment ions.Secondary fragmentations occur in the interaction cell and can be induced by various factors. Fragmentation induced by collision with inert gases, such as N2, Ar, He, etc., is called...
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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).
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Atomic Emission Spectroscopy: Lab01:29

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AES is a powerful analytical technique, especially effective when used with plasma sources, producing abundant spectra in characteristic emission lines. The Inductively Coupled Plasma (ICP), in particular, yields superior quantitative analytical data due to its high stability, low noise, low background, and minimal interferences under optimal experimental conditions. However, newer air-operated microwave sources are emerging as promising alternatives that could be more cost-effective than...
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Mass Analyzers: Overview01:13

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The mass analyzer is a crucial component of the mass spectrometer. In the ionization chamber, the vaporized sample is bombarded with a high-energy electron beam to generate a radical cation and further fragment into neutral molecules, radicals, and cations. A series of negatively charged accelerator plates accelerate the cations into the mass analyzer. The mass analyzer separates ions according to their mass-to-charge (m/z) ratios and then directs them to the detector. The common types of mass...
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High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis
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Miniaturized chaos-assisted Spectrometer.

Yujia Zhang1, Chaojun Xu1, Zhenyu Zhao1

  • 1State Key Laboratory of Photonics and Communications, School of Information and Electronic Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.

Light, Science & Applications
|September 18, 2025
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Summary
This summary is machine-generated.

This study introduces optical chaos into computational spectrometers, enhancing performance. The novel approach achieves high-resolution spectrum analysis in an ultra-compact, low-power device.

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Area of Science:

  • Optics and Photonics
  • Spectroscopy
  • Computational Imaging

Background:

  • Computational spectrometers integrate computational techniques for on-chip or in-situ analysis.
  • Existing systems face limitations in spectral response, impacting resolution, bandwidth, and footprint.
  • There's a need for advanced methods to optimize optical properties in compact spectrometer designs.

Purpose of the Study:

  • To introduce optical chaos via cavity deformation for improved spectrum manipulation.
  • To address limitations in resolution, bandwidth, and footprint of current computational spectrometers.
  • To leverage high spatial and spectral complexities for enhanced spectrometer performance.

Main Methods:

  • Utilized cavity deformation to induce optical chaos for spectrum manipulation.
  • Employed a single chaotic cavity to generate diverse spectral responses.
  • Focused on achieving high channel decorrelation and optimal spectral reconstruction.

Main Results:

  • Achieved channel decorrelation of 10 pm and optimal reconstruction over 100 nm bandwidth.
  • Demonstrated an ultra-compact footprint of 20 × 22 μm².
  • Reported ultra-low power consumption of 16.5 mW.

Conclusions:

  • The developed chaotic cavity approach significantly enhances on-chip spectrometer performance.
  • This method offers state-of-the-art resolution-bandwidth-footprint metrics.
  • The technique has the potential to transform the computational spectrometer ecosystem.