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Related Concept Videos

Atomic Emission Spectroscopy: Lab01:29

Atomic Emission Spectroscopy: Lab

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...
Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

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

Updated: Jun 19, 2026

Fabrication and Characterization of Thickness Mode Piezoelectric Devices for Atomization and Acoustofluidics
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Fabrication and Characterization of Thickness Mode Piezoelectric Devices for Atomization and Acoustofluidics

Published on: August 5, 2020

Lasing emission from an evaporating layered microdroplet.

M Essien, R L Armstrong, J B Gillespie

    Optics Letters
    |October 6, 2009
    PubMed
    Summary

    Researchers observed lasing emission from a single evaporating droplet. This droplet, with a glass core and dye-doped liquid shell, exhibited enhanced lasing at smaller shell thicknesses.

    Area of Science:

    • Optics and Photonics
    • Materials Science
    • Physical Chemistry

    Background:

    • Micrometer-sized droplets can exhibit optical resonances.
    • Evaporation dynamics can influence droplet properties.
    • Rhodamine 6G is a common laser dye.

    Purpose of the Study:

    • To investigate lasing emission from evaporating, layered, micrometer-sized droplets.
    • To explore the effect of shell thickness on droplet lasing.
    • To identify potential mechanisms for enhanced lasing.

    Main Methods:

    • Fabrication of a layered droplet with a glass core and Rhodamine 6G dye-doped shell.
    • Optical pumping using a frequency-doubled Nd:YAG pulsed laser (532 nm).
    • Spectroscopic analysis of lasing emission as a function of shell thickness during evaporation.

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    Published on: September 4, 2010

    Main Results:

    • First observation of lasing emission from a single, evaporating, layered droplet.
    • Lasing observed for shell thicknesses from ~14.5 to ~0.4 microm.
    • Dramatic increase in lasing peaks and intensity, with a >40-nm blue shift at the smallest shell thickness.

    Conclusions:

    • Evaporation significantly alters droplet morphology and optical properties.
    • Thinning of the liquid shell enhances lasing intensity and shifts spectral bandwidth.
    • Novel enhancement mechanisms are proposed to explain the observed phenomena.