Raman spectroscopy with simultaneous measurement of two orthogonally polarized Raman spectra

Abstract

A Raman microscope was modified to allow the independent acquisition of two orthogonally polarized components of a Raman spectrum in a single measurement. Preliminary performance was demonstrated by simultaneously measuring the intensity of both polarized components of the silicon Raman band at 520 cm −1 as a silicon wafer was rotated through 360 • under a polarized laser Raman probe. Polarizationresolved Raman spectra of a complex molecular crystal are also presented, illustrating the increase in spectral information available with the modified system.

Dual‐polarization Raman spectral imaging to extract overlapping molecular fingerprints of living cells

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Early dental caries detection using a fibre-optic coupled polarization-resolved Raman spectroscopic system

“…A third option to improve signal to noise involves re-configuring a conventional single-channel fibre-optic coupled Raman spectroscopic system to collect the two orthogonal components of the polarized Raman spectra simultaneously by using two separate portions on a 2-dimensional (2D) detector to detect each polarization component. This approach was previously reported by Thomson et al [16] in a study to modify a commercial confocal Raman microscope in which a polarization beamsplitter is used to resolve the orthogonal components of Raman spectra. The two spectra were then recorded simultaneously on different locations of the detector.…”