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Related Experiment Video

Updated: Jan 30, 2026

Split Point Analysis and Uncertainty Quantification of Thermal-Optical Organic/Elemental Carbon Measurements

Split Point Analysis and Uncertainty Quantification of Thermal-Optical Organic/Elemental Carbon Measurements

Published on: September 7, 2019

Uncertainty in linewidth quantification of overlapping Raman bands.

Christopher B Saltonstall¹, Thomas E Beechem², Jatin Amatya³

¹Department of Mechanical and Aerospace Engineering, University of Virginia, Charlottesville, Virginia 22904, USA.

The Review of Scientific Instruments

|February 3, 2019

Summary

This summary is machine-generated.

Quantifying spectral linewidths is challenging due to overlapping peaks. Relative peak intensity (RPI) significantly impacts linewidth accuracy in Raman spectroscopy, more than spectral resolution or signal to noise.

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Area of Science:

Spectroscopy
Materials Science
Physical Chemistry

Background:

Spectral linewidths are crucial for determining physical properties.
Overlapping spectral peaks introduce uncertainty in quantitative analysis.
Optimizing experimental conditions can minimize this uncertainty.

Purpose of the Study:

To investigate experimental factors influencing linewidth quantification uncertainty in Raman spectroscopy.
To compare the impact of spectral resolution, signal-to-noise ratio, and relative peak intensity (RPI) on linewidth accuracy.

Main Methods:

Acquisition of experimental Raman spectra from SiGe thin films.
Virtual simulation of Raman spectra under varied experimental conditions.
Analysis of the influence of spectral resolution, signal-to-noise, and RPI on linewidth measurements.

Main Results:

Relative peak intensity (RPI) was identified as the most critical parameter affecting linewidth quantification.
Spectral resolution and signal-to-noise ratio were found to be less impactful than RPI.
The findings highlight the trade-offs in experimental design for spectroscopic studies.

Conclusions:

Optimizing RPI is paramount for accurate spectroscopic linewidth determination.
The study provides guidance for experimental design in Raman and other spectroscopic techniques.
Understanding these factors enhances the reliability of quantitative spectral analysis.