Abstract:The recent discovery that linearly polarized light with a helical wavefront can exhibit vortex dichroism (also referred to as helical dichroism) has opened up new horizons in chiroptical spectroscopy with structured chiral light. Recent experiments have now pushed optical activity with vortex beams into the regime of nonlinear optics. Here the theory of two‐photon absorption (TPA) of focused optical vortices by chiral molecules: nonlinear vortex dichroism (NVD) is presented. It is discovered that highly distin… Show more
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