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Related Concept Videos

Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle01:19

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Inductively coupled plasma (ICP) is the most widely used plasma source in atomic emission spectroscopy (AES), also known as Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES). The ICP source, or torch, consists of three concentric quartz tubes with argon gas flowing through them. A spark from a Tesla coil initiates the ionization of argon, generating a high-temperature plasma.
The ions and electrons produced interact with the fluctuating magnetic field created by a water-cooled...
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Atomic Emission Spectroscopy: Overview01:20

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Atomic emission spectroscopy (AES) is an analytical technique used to determine the elemental composition of a sample by analyzing the light emitted from excited atoms. In AES, atoms in a sample are excited to higher energy levels by thermal energy from high-temperature sources, such as plasma, arcs, or sparks. When these excited atoms return to lower energy states, they emit light at specific wavelengths characteristic of each element. The resulting atomic emission spectrum, which consists of...
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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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Atomic Emission Spectroscopy: Instrumentation01:22

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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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Related Experiment Video

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Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
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CEP-stable tunable THz-emission originating from laser-waveform-controlled sub-cycle plasma-electron bursts.

T Balčiūnas, D Lorenc, M Ivanov

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    Summary

    We demonstrate tunable terahertz (THz) emission from plasma using two-color laser fields. This breakthrough allows continuous tuning of THz emission frequency into the mid-infrared range.

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    Area of Science:

    • Plasma Physics
    • Quantum Optics
    • Terahertz (THz) Science and Technology

    Background:

    • Terahertz (THz) emission is crucial for various scientific and technological applications.
    • Controlling THz emission frequency traditionally presents significant challenges.
    • Previous methods often lack tunability or require complex setups.

    Purpose of the Study:

    • To investigate tunable THz emission from plasma driven by incommensurate-frequency two-color laser fields.
    • To develop and validate a semi-classical model for THz emission.
    • To achieve continuous tuning of THz emission into the mid-infrared (mid-IR) spectral range.

    Main Methods:

    • A semi-classical transient electron current model was derived from quantum mechanical principles.
    • Experimental generation of two-color laser pulses using a CEP-locked laser and optical parametric amplifier.
    • Utilizing incommensurate laser frequencies to drive plasma and generate THz emission.

    Main Results:

    • Successfully generated CEP-stable THz emission with continuously tunable frequency.
    • Demonstrated tunability into the mid-IR range by adjusting the incommensurate laser frequencies.
    • Experimental results show strong agreement with the developed semi-classical transient electron current model.

    Conclusions:

    • The study establishes a novel method for tunable THz-emission generation in plasma.
    • The semi-classical model accurately describes the observed THz emission characteristics.
    • This work paves the way for advanced THz sources with controllable spectral properties.