Related Experiment Video
Updated: Jun 8, 2026
13:38
Laser-Induced Fluorescence Emission (L.I.F.E.) as Novel Non-Invasive Tool for In-Situ Measurements of Biomarkers in Cryospheric Habitats
Published on: October 26, 2019
Photolysis-laser-induced fluorescence diagnostic for GaCI
Applied Optics
|September 22, 2010
Summary
A new optical diagnostic technique for Gallium Chloride (GaCl) was developed. This method uses laser-induced fluorescence for precise spatial measurements of GaCl, unaffected by precursors.
Area of Science:
- Analytical Chemistry
- Spectroscopy
- Materials Science
Background:
- Gallium Chloride (GaCl) is a key compound in semiconductor manufacturing.
- Accurate spatial measurement of GaCl is crucial for process control.
- Existing diagnostic methods have limitations in specificity and spatial resolution.
Purpose of the Study:
- To develop a spatially resolved optical diagnostic for GaCl.
- To establish a method specific to GaCl, independent of its precursors.
- To characterize the photophysics of the diagnostic technique.
Main Methods:
- Utilized 248-nm excimer laser radiation for GaCl photolysis.
- Excited fluorescence in resulting gallium atoms.
- Measured gallium fluorescence at multiple wavelengths (245-417 nm).
Main Results:
- Achieved spatially resolved optical diagnostic for GaCl.
- Demonstrated specificity to GaCl, unaffected by GaCl3 precursor.
- Observed linear relationship between GaCl fluorescence, partial pressure, and laser energy.
- Contrasted photophysics with 193 nm dissociative excitation studies.
Conclusions:
- The developed technique provides a specific and spatially resolved method for GaCl detection.
- The diagnostic's linearity allows for quantitative measurements.
- This method offers an advancement over previous techniques for GaCl analysis.
