| CPC G01N 21/65 (2013.01) [G01N 2201/06113 (2013.01); G01N 2201/0633 (2013.01)] | 6 Claims |
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1. A method of obtaining polarized orbital angular momentum using structure vortex vector light such as Laguerre Gaussian beams with linear, circular, radial, and azimuthal polarization for Raman spectra detection, the method comprising the steps of:
emitting a polarized vector vortex laser light from a laser source;
passing the polarized vector vortex laser light through a narrow band filter to produce filtered light at the excitation wavelength; passing the filtered light through a wave plates (quarter wave plates, half-wave plates) to generate polarized light;
passing the polarized light through a q-plate with a q of ½ or 1 (or through vortex retarders or spiral plates) to generate a various polarized structure vortex vector light;
directing the polarized vector vortex light to contact a sample, thereby producing a Raman signal; and collecting the Raman signal back into a spectrometer, thereby obtaining a Raman spectrum of the sample.
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