Related Experiment Video
Updated: Jun 9, 2026
11:20
Investigation of Early Plasma Evolution Induced by Ultrashort Laser Pulses
Published on: July 2, 2012
Time-resolved emission studies of ArF-laser-produced microplasmas
Applied Optics
|August 31, 2010
Summary
ArF-laser-produced microplasmas in various gases show similar temperatures and electron densities. This occurs despite differences in breakdown thresholds and energy deposition, indicating a consistent plasma environment.
Area of Science:
- Physics
- Chemistry
- Laser-Plasma Interactions
Background:
- Microplasmas generated by ArF excimer lasers are crucial for various applications.
- Understanding the fundamental properties of these microplasmas is essential for optimizing their use.
Purpose of the Study:
- To investigate the characteristics of ArF-laser-produced microplasmas in different gaseous environments (CO, CO2, methanol, chloroform).
- To determine electron densities and temperatures during plasma decay.
- To assess the thermodynamic equilibrium status of these microplasmas.
Main Methods:
- Time-resolved emission spectroscopy to monitor plasma decay.
- Stark broadening analysis of atomic spectral lines (H, C, O, Cl) to determine electron densities.
- Relative population measurements of ionic and neutral species to determine ionization and excitation temperatures.
Main Results:
- Electron densities in the range of 10^17 cm^-3 to 10^18 cm^-3 were measured.
- Plasma temperatures were found to be between 15,000 K and 20,000 K.
- Despite variations in breakdown thresholds and energy input, the microplasma environment remained remarkably consistent across all studied gases.
Conclusions:
- ArF-laser-produced microplasmas exhibit similar physical conditions (temperature, electron density) regardless of the initial gas composition.
- The observed consistency suggests a universal behavior in the decay dynamics of these laser-induced plasmas.
- Further research can build upon these findings for controlled plasma generation and application development.
Related Concept Videos
01:20Atomic Emission Spectroscopy: Overview
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...
01:29Atomic Fluorescence Spectroscopy
Atomic fluorescence spectroscopy (AFS) is an analytical technique that involves the electronic transitions of atoms in a flame, furnace, or plasma being excited by electromagnetic (EM) radiation. When these atoms absorb energy, they become excited and subsequently release energy as they return to their original state. This emitted light, or "fluorescence," is observed at a right angle to the incident beam. Both absorption and emission processes transpire at distinct wavelengths, which are...
01:26Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation
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.
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.
01:22Atomic 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.
01:29Atomic 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...