A Ghost Communication Scheme Based on 2nd Order Polarization Correlations

The polarization state (PS) of polarized light is typically quantified by a Stokes vector on the Poincaré sphere [1]. Completely unpolarized light can be understood as a rapidly altering Stokes vector, with an instantaneous polarization state [2,3], that can be characterized by a polarization time which is in the femtosecond regime and can be measured by a photomultiplier (PMT) detecting two-photon absorption (TPA). Recently, ghost imaging has been extended to new ghost modality domains, in particular ghost spectroscopy and ghost polarimetry (GP) [3] by exploiting correlations in the spectral and polarization domain, respectively. In GP a hidden polarization state has been successfully recovered by exploiting polarization correlations.