Ghost polarimetry with unpolarized pseudo-thermal light

Abstract

We present an experimental implementation of the ghost polarimetry concept in unpolarized light, which allows obtaining complete information on the spatial distribution of polarization properties of objects with linear dichroism. It is theoretically shown that it is possible to restore the spatial distribution of the azimuth and a value of anisotropy of such objects. The developed technique allows us to free up the object arm from all additional optical elements, including polarizers. The experimental results of measuring the dichroism parameters of a test four-sectional sample are presented, which demonstrate the efficiency of the method and confirm the correctness of the developed theoretical model.

Nonlocal quantum differentiation between polarization objects using entanglement

“…[19][20][21] Particular attention has been attracted by the possibility of nonlocal measurement configurations with the purpose of completely remote sample characterization, which has been already demonstrated in several configurations using classical and quantum correlations. [22][23][24][25][26] Recently, we have developed a theoretical model aiming at coincidence-based discrimination of polarization objects out of a predefined set, where the number of projective measurements for sample identification is significantly reduced and which can be performed remotely by employing polarization-entangled photon pairs. 27 This measurement approach can be implemented with the optical arrangement depicted in Fig.…”

Quantum Ghost Imaging Spectrometer

“…The main appeal of the scheme is thus in its capability of displacing cumbersome analysis apparatuses to more convenient locations when it comes to hardly accessible objects as well as frequency ranges. The analogue effect in the spectral domain has been termed quantum ghost spectroscopy and relied on a conceptually identical scheme. − Ghost techniques have demonstrated advantages for microscopy applications in terms of photon flux, , contrast, and metrological performance. , Besides the two main spatial and spectral axes, ghost schemes have been extended to other degrees of freedom, foremost time, and polarization. − …”

Metasurface-Assisted Quantum Ghost Discrimination of Polarization Objects

“…The object is characterized through multiple coincidence or correlation measurements [17] that can deliver a better signal-to-noise ratio compared to classical imaging systems, and also enable imaging with a very low number of photons [18,19]. However, there remains a fundamental limitation of traditional ghost polarimetry approaches due to a need for multiple reconfigurable elements such as rotating waveplates [20][21][22][23][24][25][26][27]. Yet, the unique capabilities of polarization control with metasurfaces towards potential singleshot ghost imaging configurations remains largely untapped, so far limited to the incorporation of metasurfaces for hologram generation [28].…”