Light polarization control during free-space propagation using coherence

Vidal, Itamar; Fonseca, E. J. S.; Hickmann, Jandir M.

doi:10.1103/physreva.84.033836

Cited by 23 publications

(13 citation statements)

References 28 publications

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“…Within the paraxial approximation, a tool for dealing with such partially coherent electromagnetic sources is the 2 × 2 beam coherence-polarization (BCP) matrix [22], which collects the second-order correlation functions among all the transverse components of the electric field across the source plane. In particular, this tool, as well as its counterpart in the space-frequency domain [23], allows the effects of the coherence on the polarization properties of a paraxially propagating field to be investigated [24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41]. Sources with periodic BCP matrices can be obtained, for instance, when partially coherent fields are diffracted by periodical structures, such as amplitude, phase or polarization gratings (PGs) [42][43][44].…”

Section: Introductionmentioning

confidence: 99%

Coherence–polarization properties of fields radiated from transversely periodic electromagnetic sources

Santarsiero

Sande

Piquero

et al. 2013

J. Opt.

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Planar electromagnetic sources characterized by a periodic variation of their beam coherence-polarization matrix are investigated, as far as the polarization features of the radiated fields are concerned, within the framework of the paraxial approximation. A propagation scheme based on plane-wave decomposition leads to a longitudinal periodicity of the polarization properties of the field, thus extending the Talbot effect to the case of partially coherent electromagnetic sources. The polarization features of beams radiated from sources of this type are illustrated by means of simple examples. In particular, it is shown that completely unpolarized sources with uniform intensity profiles can be easily realized, for which the propagated field becomes perfectly polarized across some transverse planes, and vice versa.

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Section: Introductionmentioning

confidence: 99%

Coherence–polarization properties of fields radiated from transversely periodic electromagnetic sources

Santarsiero

Sande

Piquero

et al. 2013

J. Opt.

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“…In past decades, there has been considerable interest in studying changes in the degree of polarization of electromagnetic beams on propagation in free space [18][19][20][21][22][23][24][25][26]. It has been shown that, in general, the degree of polarization varies with propagation even in free space [18,19].…”

Section: Introductionmentioning

confidence: 99%

Depolarization of Vector Light Beams on Propagation in Free Space

Petrov¹

2022

Photonics

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Nonparaxial propagation of the vector vortex light beams in free space was investigated theoretically. Propagation-induced polarization changes in vector light beams with different spatial intensity distributions were analyzed. It is shown that the hybrid vector Bessel modes with polarization-OAM (orbital angular momentum) entanglement are the exact solutions of the vector Helmholtz equation. Decomposition of arbitrary vector beams in the initial plane z = 0 into these polarization-invariant beams with phase and polarization singularities was used to analyze the evolution of the polarization of light within the framework of the 2 × 2 coherency matrix formalism. It is shown that the 2D degree of polarization decreases with distance if the incident vector beam is not the modal solution. The close relationship of the degree of polarization with the quantum-mechanical purity parameter is emphasized.

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“…The definitions for the degree of polarization [7] and electromagnetic degree of coherence [4], in some sense, are consistent. The changes of the degree of polarization and the polarization state of the partially coherent vector beams during propagation in free space can be viewed as direct evidence of the fact that coherence and polarization are interrelated [8][9][10]. Since the development of the unified theories for the optical coherence and polarization in time and frequency domains by Gori and Wolf, numerous efforts have been made on elucidating the fundamental properties and outline the potential applications of partially coherent vector beams, e.g., in free-space optical communications, remote sensing, optical imaging, and particle trapping .…”

Section: Introductionmentioning

confidence: 99%

Scattering of Partially Coherent Vector Beams by a Deterministic Medium Having Parity-Time Symmetry

et al. 2022

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We study the scattering properties of the partially coherent vector beams with the deterministic media having the classic symmetric and parity-time (PT) symmetric scattering potential functions. The closed-form expressions for the intensity and polarization matrix of the far-zone scattered field are obtained, under first-order Born approximation, when the partially coherent vector beams are taken to be radially polarized and the deterministic media are assumed as the four-point scatterers. We demonstrate both analytically and numerically that the far-zone scattered field becomes noncentrosymmetric and the directionality appears in the scattering pattern when the scattering potential function is switched from classic symmetry to PT symmetry. We show the effect of spatial coherence of the incident partially coherent vector beam on the directionality in scattering. We find that by turning the symmetry property of the spatial coherence function of the incident beam, i.e., into PT symmetry, the directionality in the far-zone scattering can be suppressed or enhanced, depending on the joint effect from the symmetry of the scattering potential and the symmetry of the spatial coherence. Our findings may be useful in the application of dynamic control of the directionality in light scattering.

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Light polarization control during free-space propagation using coherence

Cited by 23 publications

References 28 publications

Coherence–polarization properties of fields radiated from transversely periodic electromagnetic sources

Coherence–polarization properties of fields radiated from transversely periodic electromagnetic sources

Depolarization of Vector Light Beams on Propagation in Free Space

Scattering of Partially Coherent Vector Beams by a Deterministic Medium Having Parity-Time Symmetry

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