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Ultrafast Time-resolved Near-IR Stimulated Raman Measurements of Functional π-conjugate Systems
Published on: February 10, 2020
Time-resolved Raman spectroscopy for in situ planetary mineralogy
Jordana Blacksberg1, George R Rossman, Anthony Gleckler
1Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109, USA. jordana.blacksberg@jpl.nasa.gov
Applied Optics
|September 11, 2010
Summary
Time-resolved Raman spectroscopy overcomes fluorescence interference, enabling detailed mineral analysis on other planets. This technique provides crucial structural and compositional data for planetary exploration missions.
Area of Science:
- Planetary Science
- Spectroscopy
- Mineralogy
Background:
- In situ investigations are crucial for planetary mineralogy.
- Raman spectroscopy offers definitive mineralogical information.
- Fluorescence interference limits traditional Raman spectroscopy, especially for altered minerals.
Purpose of the Study:
- To develop and demonstrate a time-resolved Raman spectrometer for planetary mineralogy.
- To overcome fluorescence interference in mineral analysis.
- To enable in situ examination of diverse planetary bodies.
Main Methods:
- Development of a time-resolved Raman spectrometer using a streak camera and pulsed laser.
- Utilizing picosecond time resolution to separate Raman signals from fluorescence.
- Analysis of time-resolved Raman and fluorescence spectra from minerals.
Main Results:
- The time-resolved approach effectively mitigates fluorescence interference.
- High-quality Raman spectra were obtained from highly fluorescent, Mars-relevant minerals like clays, sulfates, and phosphates.
- Demonstrated the capability to observe the complete time evolution of Raman and fluorescence spectra.
Conclusions:
- Time-resolved Raman spectroscopy is a powerful tool for in situ planetary mineralogical studies.
- This technique enhances the analysis of complex mineral samples in extraterrestrial environments.
- It represents a next-generation instrument for planetary exploration, particularly for Mars and asteroids.
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