Lock-in detection of Raman resonance (LIDORR) in the presence of overwhelming fluorescence

Efforts to sequester atmospheric carbon in soil require effective monitoring methods. Soil water content confounds the conventional application of infrared absorption. Raman spectroscopy contends well with water, but suffers from the overwhelming fluorescence typically encountered in the analysis of soil samples. Here we propose to combine an modulated two-colour illumination scheme with antiphase lock-in detection that will serve to suppress fluorescent backgrounds and uncover Raman signatures of organic substances captured in soils.

Intern: 
Ginger Wang Brown;Zahra Poursorkh;Mahsa Zarei
Faculty Supervisor: 
Edward R Grant
Province: 
British Columbia
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